Agilent Technologies 6834B User Manual

User’s Guide  
AC Power Solutions  
Agilent Models 6814B, 6834B, and 6843A  
For instruments with Serial Numbers:  
Agilent 6814B: 3601A-00101 through 00270  
US36010101-up  
Agilent 6834B: 3601A-00101 through 00140  
US36010101-up  
Agilent 6843A: 3540A-00101 through 00140  
US35400101-up  
Agilent Part No. 5962-0887  
Microfiche No 5962-0888  
Printed in U.S.A.  
December, 1998  
Update April 2000  
Safety Summary  
The following general safety precautions must be observed during all phases of operation of this instrument.  
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety  
standards of design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability  
for the customer’s failure to comply with these requirements.  
WARNING: LETHAL VOLTAGES  
Ac sources can supply 425 V peak at their output. DEATH on contact may result if the output terminals or circuits  
connected to the output are touched when power is applied.  
GENERAL  
This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of  
this product may be impaired if it is used in a manner not specified in the operation instructions.  
Any LEDs used in this product are Class 1 LEDs as per IEC 825-1.  
ENVIRONMENTAL CONDITONS  
This instrument is intended for indoor use in an installation category III, pollution degree 2 environment. It is  
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the  
specifications tables for the ac mains voltage requirements and ambient operating temperature range.  
BEFORE APPLYING POWER  
Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety  
precautions are taken. Note the instrument’s external markings described under "Safety Symbols".  
GROUND THE INSTRUMENT  
To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The  
instrument must be connected to the ac power mains through a grounded power cable, with the ground wire firmly  
connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective  
(grounding) conductor or disconnection of the protective earth terminal will cause a potential shock hazard that  
could result in personal injury.  
ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l’appareil.  
Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.  
FUSES  
Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be  
used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.  
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE  
Do not operate the instrument in the presence of flammable gases or fumes.  
DO NOT REMOVE THE INSTRUMENT COVER  
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be  
made only by qualified service personnel.  
DO NOT EXCEED INPUT RATINGS  
Operation at line voltages or frequencies in excess of those stated on the line rating label may cause leakage  
currents in excess of 5.0 mA peak.  
Instruments that appear damaged or defective should be made inoperative and secured against unintended  
operation until they can be repaired by qualified service personnel.  
3
SAFETY SYMBOLS  
Direct current  
Alternating current  
Both direct and alternating current  
Three-phase alternating current  
Earth (ground) terminal  
Protective earth (ground) terminal  
Frame or chassis terminal  
Terminal is at earth potential. Used for measurement and control circuits designed to be  
operated with one terminal at earth potential.  
Terminal for Neutral conductor on permanently installed equipment  
Terminal for Line conductor on permanently installed equipment  
On (supply)  
Off (supply)  
Standby (supply). Units with this symbol are not completely disconnected from ac mains when  
this switch is off. To completely disconnect the unit from ac mains, either disconnect the power  
cord or have a qualified electrician install an external switch.  
In position of a bi-stable push control  
Out position of a bi-stable push control  
Caution, risk of electric shock  
Caution, hot surface  
Caution (refer to accompanying documents)  
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like,  
which, if not correctly performed or adhered to, could result in personal injury. Do not proceed  
beyond a WARNING sign until the indicated conditions are fully understood and met.  
WARNING  
Caution  
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like,  
which, if not correctly performed or adhered to, could result in damage to or destruction of part  
or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions  
are fully understood and met.  
4
Declaration Page  
DECLARATION OF CONFORMITY  
according to ISO/IEC Guide 22 and EN 45014  
Manufacturer’s Name:  
Manufacturer’s Address:  
Agilent Technologies, Inc.  
140 Green Pond Road  
Rockaway, New Jersey 07866  
U.S.A.  
declares that the Product  
Product Name:  
a) AC Power Source/Analyzer  
b) Harmonic/Flicker Test System  
Model Number(s):  
a) Agilent 6814A, 6814B, 6834A, 6834B  
b) Agilent 6843A  
conforms to the following Product Specifications:  
Safety:  
EMC:  
IEC 1010-1:1990+A1(1992) / EN 61010-1:1993  
CISPR 11:1990 / EN 55011:1991 - Group 1 Class A  
IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD  
IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m  
IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines  
1 kV Power Lines  
Supplementary Information:  
The product herewith complies with the requirements of the Low Voltage Directive  
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.  
New Jersey  
Location  
January 1997  
Date  
__  
__  
Bruce Krueger / Quality Manager  
European Contact: Your local Agilent Sales and Service Office or Agilent GmbH,  
Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:+49-7031-14-3143)  
5
Acoustic Noise Information  
Herstellerbescheinigung  
Diese Information steht im Zusammenhang mit den Anforderungen der  
Maschinenläminformationsverordnung vom 18 Januar 1991.  
* Schalldruckpegel Lp <70 dB(A)  
* Am Arbeitsplatz  
* Normaler Betrieb  
* Nach EN 27779 (Typprüfung).  
Manufacturer’s Declaration  
This statement is provided to comply with the requirements of the German Sound Emission Directive,  
from 18 January 1991.  
* Sound Pressure Lp <70 dB(A)  
* At Operator Position  
* Normal Operation  
* According to EN 27779 (Type Test).  
Printing History  
The edition and current revision of this manual are indicated below. Reprints of this manual containing  
minor corrections and updates may have the same printing date. Revised editions are identified by a new  
printing date. A revised edition incorporates all new or corrected material since the previous printing  
date.  
Changes to the manual occurring between revisions are covered by change sheets shipped with the  
manual. In some cases, the manual change applies only to specific instruments. Instructions provided on  
the change sheet will indicate if a particular change applies only to certain instruments.  
This document contains proprietary information protected by copyright. All rights are reserved. No part  
of this document may be photocopied, reproduced, or translated into another language without the prior  
consent of Agilent Technologies. The information contained in this document is subject to change  
without notice.  
Copyright 1996, 1998 Agilent Technologies, Inc.  
Edition 1 _________January, 1996  
Edition 2 ________December, 1998  
Update ________April, 2000  
6
Table of Contents  
Warranty Information  
Safety Summary  
Declaration Page  
Acoustic Noise Information  
Printing History  
Table of Contents  
2
3
5
6
6
7
1. GENERAL INFORMATION  
Document Orientation  
Safety Considerations  
Options, Accessories, and User Replaceable Parts  
Description  
9
9
10  
10  
10  
11  
12  
12  
12  
13  
Capabilities  
Front Panel/Remote Operation  
Output Characteristic  
Ranges  
Output VA Capability  
2. INSTALLATION  
Inspection  
15  
15  
15  
15  
15  
15  
16  
16  
16  
16  
17  
17  
18  
19  
19  
20  
21  
21  
21  
21  
22  
22  
23  
Damage  
Packaging Material  
Items Supplied  
Cleaning  
Location  
Bench Operation  
Rack Mounting  
Input Connections  
Input Source and Line Fuse  
Installing the Power Cord  
Output Connections  
Wire Considerations  
Voltage Drops  
Remote Sense Connections  
OVP Considerations  
Output Rating  
Trigger Connections  
Digital Connections  
Controller Connections  
GPIB Connector  
RS-232 Interface  
3. TURN-ON CHECKOUT  
Introduction  
25  
25  
25  
26  
26  
29  
29  
29  
Preliminary Checkout  
Using the Keypad  
Checkout Procedure  
In Case of Trouble  
Error Messages  
Line Fuse  
7
4. FRONT PANEL OPERATION  
Introduction  
31  
31  
31  
33  
34  
34  
35  
35  
36  
38  
39  
40  
41  
41  
42  
43  
43  
44  
47  
50  
52  
53  
53  
54  
Front Panel Description  
System Keys  
Function Keys  
Immediate Action Keys  
Scrolling Keys  
Meter Display Keys  
Output Control Keys  
Protection and Status Control Keys  
Trigger and List Control Keys  
Entry Keys  
Examples of Front Panel Programming  
1 - Setting the Output Voltage Amplitude  
Procedure for Three-Phase AC Sources  
2 - Setting the Output Frequency  
3 - Setting a Protection Feature  
4 - Using Transient Voltage Modes  
5 - Trigger Delays and Phase Synchronization  
6 - Using Slew Rates to Generate Waveforms  
7 - Measuring Peak Inrush Current  
8 - Setting the GPIB Address and RS-232 Parameters  
9 - Saving and Recalling Operating States  
10 - Switching Between Single- and Three-phase Operation (Agilent 6834B only)  
A. SPECIFICATIONS  
Specifications  
55  
55  
Supplemental Characteristics  
56  
B. VERIFICATION AND CALIBRATION  
Introduction  
59  
59  
59  
60  
60  
60  
61  
61  
62  
63  
63  
63  
64  
65  
66  
66  
66  
67  
67  
67  
Equipment Required  
Test Setup  
Performing the Verification Tests  
Turn-On Checkout Procedure  
Voltage Programming and Measurement Accuracy  
RMS Current Readback Accuracy  
Performing the Calibration Procedure  
Front Panel Calibration Menu  
Front Panel Calibration  
Enable Calibration Mode  
Calibrating and Entering Voltage Calibration Values  
Calibrating and Entering Current Calibration Values  
Calibrating the Output Impedance (Agilent 6843A only)  
Saving the Calibration Constants  
Changing the Calibration Password  
Calibration Error Messages  
Calibration Over the GPIB  
Agilent Calibration Program Listing  
C. ERROR MESSAGES  
71  
71  
Error Number List  
INDEX  
75  
8
1
General Information  
Document Orientation  
This manual describes the operation of the Agilent Technologies 6814B/6834B/6843A AC Power  
Solutions. These units will be referred to as "ac sources" throughout this manual. Operation of the  
Agilent 6843A is described for normal mode operation only. The following documents are shipped with  
your ac source:  
a Quick-Start Guide, to help you quickly get started using the ac source  
a User’s Guide, containing detailed installation, checkout, and front panel information  
a Programming Guide, containing detailed GPIB programming information  
a Quick Reference Card, designed as a memory jogger for the experienced user  
Regulatory Test Solution User’s Guides are shipped with Agilent 6843A units only  
You will find information on the following tasks in these guides. Refer to the table of contents of each  
guide for a complete list of the topics.  
Topic  
Accessories and options  
Calibrating the ac source  
Front panel keys  
Front panel programming examples  
Line voltage connections  
Line voltage ratings  
Operator replaceable parts  
Operator troubleshooting  
Operating characteristics  
Performance specifications  
Quick operating checkout  
Rack mounting  
Location  
Chapter 1 - this guide  
Appendix B - this guide  
Chapter 4 - this guide  
Chapter 4 - this guide  
Chapter 2 - this guide  
Appendix A - this guide  
Chapter 1 - this guide  
Chapter 3 - this guide  
Appendix A - this guide  
Appendix A - this guide  
Chapter 3 - this guide  
Chapter 2 - this guide  
Chapter 2 - this guide  
Chapter 3 - Programming Guide  
Chapter 4 - Programming Guide  
Chapter 3 - this guide  
Chapter 2 - this guide  
Chapter 2 - this guide  
Chapter 2 - this guide  
Chapter 2 - this guide  
Chapter 2 - this guide  
RS-232 operation  
SCPI programming examples  
SCPI programming commands  
Turn-on/checkout  
Wiring - discrete fault indicator (DFI)  
- GPIB controller  
- load or loads  
- voltage sensing (local and remote)  
- remote inhibit (RI)  
9
1 - General Information  
Safety Considerations  
This ac source is a Safety Class 1 instrument, which means it has a protective earth terminal. That  
terminal must be connected to earth ground through a power source equipped with a ground receptacle.  
Refer to the Safety Summary page at the beginning of this guide for general safety information. Before  
installation or operation, check the ac source and review this guide for safety warnings and instructions.  
Safety warnings for specific procedures are located at appropriate places in the guide.  
Options, Accessories, and User Replaceable Parts  
Table 1-1. Options  
Option  
400  
Description  
Input power 360-440 Vac, three-phase, 47-63 Hz  
1CM  
2- Rack mount kit (Agilent 5062-3977)  
Support rails (Agilent 5064-0001) are required (rails are not included in rack mount kit).  
Table 1-2. Accessories  
Item  
Agilent Part Number  
Fuse replacement kits  
30AM for 180-235 Vac, 3-phase line  
5060-3513  
GPIB cables  
10833D  
10833A  
10833B  
0.5 meters (1.6 ft)  
1.0 meter (3.3 ft)  
2.0 meters (6.6 ft)  
10833C  
5063-2310  
3.0 meters (13.2 ft)  
Heavy duty slide mount kit  
Table 1-3. User Replaceable Parts List  
Description  
Agilent Part No.  
See “Options”  
See “Accessories”  
1252-3698  
Rack mount kit  
Slide mount kit  
7-terminal sense connector plug  
Sense connector cover  
4040-2268  
4-terminal digital connector plug  
1252-1488  
AC input safety cover (with strain relief and brushing)  
Screw (4), ac input safety cover (6-32 x 1.5in)  
Screw (8), ac input barrier block (8-32 x 5/16in)  
AC output safety cover  
5001-9837  
2360-0405  
N/A  
5001-9811  
Screw (2), ac output safety cover (6-32 x .3in)  
Screw (8), ac output barrier block (10-32 x .37in)  
Fuse safety cover  
2460-0012  
N/A  
5001-9810  
Screw (2), fuse safety cover (6-32 x .3in)  
User’s Guide (this manual)  
2460-0012  
5962-0887  
Programming Guide  
5962-0889  
Quick Start Guide  
5962-0883  
Quick Reference Card  
5962-0885  
Appropriate Agilent Regulatory Test Solution Software  
Agilent 14761A, 14762A, 14763A  
10  
General Information - 1  
Description  
The ac source combines three instruments in one unit as shown in the following figure. The function  
generator produces waveforms with programmable amplitude, frequency, and shape. The power  
amplifier amplifies the function generator signal to produce the ac power for your application. The  
measurement functions range from a simple readback of rms voltage and current, to sophisticated  
capabilities such as waveform analysis.  
shunt  
SOURCE  
DAC  
MEASUREMENT  
BLOCK  
BIPOLAR  
WAVEFORM  
GENERATOR  
AMPLIFIER  
POWERMETER  
FFT ANALYZER  
Figure 1-1. AC Source Functional Elements  
The following model ac power sources are described in this User’s Guide:  
Model  
Description  
Agilent 6814B  
Agilent 6834B  
3000 VA single –phase operation  
1500 VA/ phase for three-phase operation  
(4500 VA for single-phase operation)  
4500 VA single-phase operation  
Agilent 6843A  
Capabilities  
Programmable ac voltage, dc voltage, frequency, phase, and current limit.  
Sine, square, clipped sine, and user-definable waveforms.  
Voltage and frequency slew control.  
Synthesized waveform generation for high resolution and accuracy in frequency, low waveform  
distortion, and glitch-free phase transitions.  
Step and pulse output transients for generating surge, sag, dropout, and other line disturbance  
simulations.  
Nonvolatile list programming for generating complex output transients or test sequences.  
Three-phase/single-phase output capability (Agilent 6834B only)  
Extensive measurement capability:  
Ac rms, dc, ac+dc voltage and current and peak current.  
Real, reactive, and apparent power.  
Harmonic analysis of voltage and current waveforms gives amplitude, phase, and total  
harmonic distortion results up to the 50th harmonic.  
Triggered acquisition of digitized voltage and current with extensive post-acquisition  
calculations.  
11  
1 - General Information  
Additional total power and neutral current measurements in the three-phase model.  
All measurements made with 16-bit resolution.  
Trigger In and Trigger Out for synchronizing transient events or measurements with external  
signals.  
Front panel control with 14-character vacuum fluorescent display, keypad, and rotary pulse  
generators for voltage and frequency settings.  
Built-in GPIB and RS-232 interface programming with SCPI command language.  
Nonvolatile state and waveform storage and recall.  
Over-voltage, over-power, over-current, over-temperature, and RI/DFI protection features.  
Built-in output and sense disconnect relays.  
Extensive selftest, status reporting, and software calibration.  
Front Panel/Remote Operation  
The front panel has both rotary (RPG) and keypad controls for setting the output voltage and frequency.  
The panel display provides digital readouts of a number of output measurements. Annunciators display  
the operating status of the ac source. System keys let you perform system functions such as setting the  
GPIB address and recalling operating states. Front panel Function keys access the ac source function  
menus. Front panel Entry keys let you select and enter parameter values. Refer to Chapter 4 for a  
complete description of the front panel controls.  
Remotely programming is accomplished from either the GPIB bus or from an RS-232 serial port. GPIB  
and RS-232 programming uses SCPI commands (Standard Commands for Programmable Instruments)  
that make the ac source programs compatible with those of other instruments. AC source status registers  
permit remote monitoring of a wide variety of ac source operating conditions  
NOTE:  
Refer to the ac source Programming Guide for further information about remotely  
programming the ac source. If you are using the Agilent 6843A, refer to the appropriate  
Regulatory Test Solution User’s Guide for information about regulatory testing.  
Output Characteristic  
Ranges  
The ac source’s output characteristic is shown in the following figure. The output voltage of the ac  
source may be adjusted to any value within the range of the unit. On three-phase units, each phase can be  
adjusted independently of the other two.  
Rated output VA and conversion efficiency is greatest when the output voltage is set near maximum. For  
this reason, the ac source is designed to operate on one of two ranges: 150 volts full-scale, or 300 volts  
full-scale. You should choose the range that allows you to operate nearest the full-scale output capability  
of the selected range.  
12  
General Information - 1  
Vrms  
300 V  
150 V  
See Figure 1-3  
Irms  
10A (6834B 3phase)  
30A (6834B 1phase)  
20A (6814B)  
0
5A  
15A  
10A  
16A  
32A (6843A)  
Figure 1-2. AC Source Output Characteristic (in real-time mode)  
Output VA Capability  
The output capability of each output phase is limited by VA (volts-amps) rather than power (watts). The  
amount of VA available to a load can be determined by examining figure 1-3, the output power curve.  
This curve rates the available VA versus output voltage. Full VA is available only at a full-scale voltage.  
Full current is available at voltages between 50% and 100% of the output voltage range. Appendix A  
documents the ac source’s specifications and supplemental characteristics.  
NOTE:  
The load on the ac source may draw full VA at any power factor between 0 and 1, and  
may draw maximum current with a crest factor of 4 (3 for Agilent 6843A). If the load  
draws current in excess of the maximum rated rms or peak current, the voltage amplitude  
will be clipped to prevent excessive internal power dissipation.  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
OUTPUT VOLTAGE, PERCENT OF RANGE  
Figure 1-3. AC Source VA Capabilities  
13  
2
Installation  
Inspection  
Damage  
When you receive your ac source, inspect it for any obvious damage that may have occurred during  
shipment. If there is damage, notify the shipping carrier and the nearest Agilent Sales and Support Office  
immediately. The list of Agilent Sales and Support Offices is at the back of this guide. Warranty  
information is printed in the front of this guide.  
Packaging Material  
Until you have checked out the ac source, save the shipping carton and packing materials in case the unit  
has to be returned. If you return the ac source for service, attach a tag identifying the model number and  
the owner. Also include a brief description of the problem.  
Items Supplied  
Check that the following items are included with your ac source. Some items are installed in the unit.  
Power Cord  
A power cord appropriate for your location. The cord may or may not be terminated in  
a power plug (see "Options" in Chapter 1). If the cord is not included, contact your  
nearest Agilent Sales and Support Offices (refer to the list at the back of this guide).  
Sense/Digital connector a 4-terminal digital plug that connects to the back of the unit.  
a 7-terminal sense plug that connects to the back of the unit.  
Safety covers  
Manuals  
Ac input cover with strain relief  
Ac output cover  
Fuse cover  
User’s Guide  
Programming Guide  
Quick Start Guide  
Quick Reference Card  
Regulatory Test Solutions Guides (supplied with Agilent 6843A units)  
Change page  
If applicable, change sheets may be included with this guide. If there are change sheets,  
make the indicated corrections in this guide.  
Cleaning  
Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to  
clean internally.  
WARNING:  
To prevent electric shock, unplug the unit before cleaning.  
15  
2 - Installation  
Location  
Refer to the Safety Summary page at the beginning of this manual for safety-related information about  
environmental conditions.  
WARNING: Agilent 6814B units weigh 79.5 kg (175 lbs.)  
Agilent 6834B/ 6843A units weigh 87.7 kg (193 lbs.)  
Obtain adequate help when moving the unit or mounting the unit in the rack.  
Bench Operation  
The outline diagram in figure 2-1 gives the dimensions of your ac source. The feet may be removed for  
rack mounting. Your ac source must be installed in a location that allows sufficient space at the sides and  
back of the unit for adequate air circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do  
not block the fan exhaust at the rear of the unit.  
Rack Mounting  
The ac source can be mounted in a standard 19-inch rack panel or cabinet. Rack mounting kits are  
available as Option 1CM or 1CP. Installation instructions are included with each rack mounting kit  
CAUTION:  
Agilent 6814B/ 6834B/ 6843A units require instrument support rails for non-stationary  
installations. These are normally ordered with the cabinet and are not included with the  
rack mounting kits.  
TOP  
574.7mm  
22.6"  
425.5mm  
16.75"  
REAR  
262.6mm  
10.3"  
266.7mm  
10.5"  
19.1mm  
0.8"  
12.7mm  
0.5"  
SIDE  
Figure 2-1. Outline Diagram  
16  
Installation - 2  
Input Connections  
Input Source and Line Fuse  
The ac source requires a 3-phase power service that provides 7350 VA (6000 W) maximum. The power  
service should have a current rating greater than or equal to the ac source’s circuit breaker rating. The ac  
source has a delta input (no neutral connection) and will accept power from either delta (triangle) or wye  
(star) services.  
CAUTION:  
Two input voltage ranges are available (see "AC Input Ratings" in appendix A). The ac  
source will be damaged if it is operated at an input voltage that is outside of its  
configured input range.  
In order to maintain phase current balancing, the power service should be a dedicated line with only  
Agilent 6814B/6834B/6843A ac sources drawing current from it. A disconnect box located near the ac  
source is recommended for all installations and is mandatory for direct-wired installations.  
Installing the Power Cord  
WARNING: Installation of the power cord must be done by a qualified and licensed electrician  
and must be in accordance with local electrical codes.  
The power cords supplied with the ac source do not include a power plug. Terminating connectors and a  
ground lug are attached to one end of the cord. See Figure 2-2 while performing the following  
procedure.  
1.  
Check the line fuses as follows:  
a.  
b.  
c.  
Examine the FUSES label on the rear panel.  
Remove the safety cover in front of the fuse caps.  
Unscrew the line fuse caps from the rear panel and verify that all fuses are as  
specified on the label. Reinstall the fuses.  
d.  
Reinstall the safety cover in front of the fuse caps.  
2.  
3.  
4.  
Remove the ac input cover from the back of the unit.  
Open the line clamp on the ac input cover and insert the line cord through the opening.  
Position the power cord so that the clamp is near the end of the outside insulating sheath  
on the power cord. Tighten the screws to secure the clamp.  
5.  
Secure the three ac lines to the ac power strip as follows:  
Phase 1 to L1 (black).  
Phase 2 to L2 (red).  
Phase 3 to L3 (orange).  
6.  
7.  
Secure the ground wire (green) to the chassis earth ground terminal.  
Slip the safety cover over the ac input terminal strip and secure the cover with the four  
screws.  
8.  
If required, wire the appropriate power plug to the other end of the power cord. For user-  
made cables, strip back the sheath 10 cm (4 in).  
17  
2 - Installation  
2
CAUTION  
7
LINE RATING  
WARNING  
WARNING  
F 1  
F 2  
F 3  
L 2  
L 3  
L 1  
3
1
6
4
5
10cm (4 in.)  
Figure 2-2. Connecting the Power Cord  
Output Connections  
The power output terminal block has a termination for each of the output phases (φ1, φ2, φ3 ) and a  
floating neutral line (COM) for the phase return connections. A separate earth ground terminal () is  
located near the output terminals.  
Figure 2-3. Output Connections  
18  
Installation - 2  
NOTE:  
To minimize the possibility of instability on the output, keep load leads as short as  
possible bundle or twist the leads tightly together to minimize inductance  
Wire Considerations  
Current Ratings  
Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat  
when carrying the maximum short-circuit current of the ac source. If there is more  
than one load, then any pair of load wires must be capable of safely carrying the  
full-rated current of the ac source.  
Table 2-1 lists the characteristics of AWG (American Wire Gage) copper wire.  
Table 2-1. Ampacity and Resistance of Stranded Copper Conductors  
AWG No.  
Ampacity1  
Resistance2  
AWG No.  
Ampacity1  
Resistance2  
(/m)  
(/m)  
14  
12  
10  
8
25  
30  
40  
60  
0.0103  
0.0065  
0.0041  
0.0025  
6
4
80  
0.0016  
105  
140  
195  
0.0010  
2
0.00064  
0.00040  
1/0  
NOTES:  
1. Ampacity is based on 30°C ambient temperature with conductor rated at 60°C. For ambient  
temperature other than 30°C, multiply the above ampacities by the following constants:  
Constant  
Temp. (°C)  
21-25  
Temp. (°C)  
41-45  
Temp. (°C)  
0.71  
1.08  
26-30  
1.00  
46-50  
0.58  
31-35  
0.91  
51-55  
0.41  
36-40  
0.82  
2. Resistance is nominal at 75 °C wire temperature.  
Voltage Drops  
The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the  
wires. In general, if the wires are heavy enough to carry the maximum short circuit current without  
overheating, excessive voltage drops will not be a problem. The voltage drops across the load wires  
should be limited to less than 2% of the output voltage.  
Refer to Table 2-1 if you need to calculate the voltage drop for some commonly used AWG copper wire.  
19  
2 - Installation  
Remote Sense Connections  
Under normal operation, the ac source senses the output voltage at the output terminals on the back of the  
unit. External sense terminals are available on the back of the unit that allow the output voltages to be  
sensed at the load, compensating for impedance losses in the load wiring. As shown in the following  
figure:  
Connect the phase 1 (φ1) through phase 2 (φ) sense terminals to the side of the load that connects  
to the corresponding output terminal.  
Connect the Neutral (COM) sense terminal connector to the neutral side of the load.  
Twist and shield all signal wires to and from the sense connectors.  
The sense leads are part of the ac source’s feedback path and must be kept at a low resistance in order to  
maintain optimal performance. Connect the sense leads carefully so that they do not become open-  
circuited. If the sense leads are left unconnected or become open during operation, the ac source will  
regulate at the output terminals, resulting in a 3% to 5% increase in output over the programmed value.  
Set the ALC command to EXT (external) to enable remote sensing. The ALC command is located under  
the Voltage key as explained in Chapter 4. Set the ALC command to INT (internal) to disable remote  
sensing.  
COM φ 3  
φ 2  
φ1  
NOTE: Phase 2 and phase 3 connections are  
not available on 6814B/6843A units.  
Connector and connections are  
rotated 180 degrees for 6843A.  
φ1 LOAD  
φ1  
φ 2  
φ 2 LOAD  
φ 3 LOAD  
φ 3  
COM  
Figure 2-4. Remote Sense Connections  
20  
Installation - 2  
OVP Considerations  
The overvoltage protection circuit senses voltage near the output terminals, not at the load. Therefore the  
signal sensed by the OVP circuit can be significantly higher than the actual voltage at the load. When  
using remote sensing, you must program the OVP trip voltage high enough to compensate for the voltage  
drop between the output terminals and the load.  
Output Rating  
In remote sense applications, the voltage drop in the load leads subtracts from the available load voltage  
(see "Remote Sensing Capability" in appendix A). As the ac source increases its output to overcome this  
voltage drop, the sum of the programmed voltage and the load-lead drop may exceed the ac source’s  
maximum voltage rating. This will not damage the unit, but may trip the OV protection circuit, which  
senses the voltage at the output terminals.  
Trigger Connections  
The BNC trigger connectors on the rear panel let you apply trigger signals to the ac source as well as  
generate trigger signals from the ac source. The electrical characteristics of the trigger connectors are  
described in appendix A. More information on programming external triggers is found in Chapter 4 of  
the ac source Programming Guide.  
Trigger IN  
Allows negative-going external trigger signals to trigger the ac source.  
Trigger OUT  
Generates a negative-going pulse when the selected transient output has occurred.  
Digital Connections  
This connector, which is on the rear panel, is for connecting the fault and the inhibit signals. The fault  
(FLT) signal is also referred to as the DFI signal in the front panel and SCPI commands. The inhibit  
(INH) signal is also referred to as the RI signal in the front panel and SCPI commands.  
The connector accepts wires sizes from AWG 22 to AWG 12. Disconnect the mating plug to make your  
wire connections. The electrical characteristics of the digital connectors are described in appendix A.  
More information on programming the digital connectors is found in Chapter 4 of the ac source  
Programming Guide.  
NOTE:  
It is good engineering practice to twist and shield all signal wires to and from the digital  
connectors  
The following examples show how you can connect the FLT/INH circuits of the ac source.  
In example A, the INH input connects to a switch that shorts pin + to pin whenever it is necessary to  
disable output of the unit. This activates the remote inhibit (RI) circuit, which turns off the ac output. The  
front panel Prot annunciator comes on and the RI bit is set in the Questionable Status Event register. To  
re-enable the unit, first open the connection between pins + and and then clear the protection circuit.  
This can be done either from the front panel or over the GPIB /RS-232.  
21  
2 - Installation  
In example B, the FLT output of one unit is connected to the INH input of another unit. A fault condition  
in one of the units will disable all of them without intervention either by the controller or external  
circuitry. The controller can be made aware of the fault via a service request (SRQ) generated by the  
Questionable Status summary bit.  
INH  
FLT  
NOTE: Diagram is correct for 6814B/6834B.  
Connector and connections are rotated 180  
degrees for 6843A  
-
+
+
-
. . . .  
-
-
+
+
FLT Output  
INH  
FLT  
+
+
-
-
INH Input  
-
. . . .  
+
+
-
+
-
+
-
INH Common  
INH Input  
INH Input  
Switch  
(Normally  
Open)  
FLT Output  
B) FLT Example with Multiple Units  
A) INH Example with One Unit  
Figure 2-5. FLT/INH Examples  
Controller Connections  
The ac source connects to a controller either through a GPIB or an RS-232 connector.  
GPIB Connector  
Each ac source has its own GPIB bus address. AC sources may be connected to the bus in series  
configuration, star configuration, or a combination of the two. You may connect from 1 to 15 ac sources  
to a controller GPIB interface.  
NOTE:  
The ac source is shipped from the factory with its GPIB address set to 5. This address  
can be changed as described in Chapter 4 of this guide.  
22  
Installation - 2  
RS-232 Interface  
The ac source provides an RS-232 programming interface, which is activated by commands located under  
the front panel Address key. When the RS-232 interface is selected, the GPIB interface is disabled.  
NOTE:  
Sending or receiving data over the RS-232 interface when not configured for REMOTE  
operation can cause unpredictable results. Always make sure the ac source is configured  
for remote operation when using the RS-232 interface.  
Interface Commands  
All SCPI commands are available through RS-232 programming. The SYSTem:LOCal,  
SYSTem:REMote, and SYSTem:RWLock commands are only available through the RS-232 interface.  
SYSTem:LOCal  
keys  
Places the ac source in local mode during RS-232 operation. The front panel  
are functional.  
SYSTem:REMote  
SYSTem:RWLock  
Places the ac source in remote mode during RS-232 operation. All front panel  
keys except the Local key are disabled.  
Places the ac source in remote mode during RS-232 operation. All front panel  
keys including the Local key are disabled.  
RS-232 Data Format  
constant 11-bit data format  
one start bit  
seven data bits plus a parity bit (even or odd parity), or eight data bits without parity  
(parity bit is "0")  
two stop bits  
You can specify one of the following baud rates: 300 600 1200 2400 4800 9600  
NOTE:  
The ac source always uses one start bit and two stop bits regardless of the baud rate. The  
number of start and stop bits is not programmable.  
RS-232 Connector  
The RS-232 connector is a DB-9, male connector. You can connect the ac source to any computer or  
terminal with a properly configured DB-25 connector. You can use a standard Agilent 24542G or  
24542H interface cable.  
Table 2-2. RS-232 Connector  
Pin  
1
2
3
4
5
6
7
Input/Output  
Output  
Description  
1 2 3 4 5  
Reserved for service use  
Receive Data (RxD)  
Transmit Data (TxD)  
Data Terminal Ready (DTR)  
Signal ground  
Input  
Output  
Output  
Common  
Input  
Data Set Ready (DSR)  
no connection  
6 7 8 9  
8
no connection  
9
Output  
Reserved for service use  
23  
2 - Installation  
Hardware Handshake  
The RS-232 interface uses the DTR (data terminal ready) line as a holdoff signal to the bus controller.  
When DTR is true, the bus controller may send data to the ac source. When DTR goes false, the bus  
controller must stop sending data within 10 characters, and must not send any more data until DTR goes  
true again. The ac source sets DTR false under two conditions.  
1.  
When the input buffer is full (approximately 100 characters have been received), it will set DTR  
false. When enough characters have been removed to make space in the input buffer, DTR will  
be set to true, unless condition 2 (see below) prevents this.  
2.  
When the ac source wants to "talk", which means that it has processed a query, and has seen a  
<newline> message terminator, it will set DTR false. This implies that once a query has been  
sent to the power source, the bus controller should read the response before attempting to send  
more data. It also means that a <newline> must terminate the command string. After the response  
has been output, the ac source will set DTR true again, unless condition #1 prevents this.  
The ac source monitors the DSR (data set ready) line to determine when the bus controller is ready to  
accept data. It checks this line before each character is sent, and the output is suspended if DSR is false.  
When DSR goes true, transmission will resume. The ac source will leave DTR false while output is  
suspended. A form of deadlock exists until the bus controller asserts DSR true to allow the ac source to  
complete the transmission.  
Control-C is the equivalent to the GPIB device clear command. It clears the operation in progress and  
discards any pending output. For the control-C character to be recognized by the power source while it  
holds DTR false, the bus controller must first set DSR false.  
Null modem RS-232 interface cables swap the DTR and DSR lines as shown in the following figure. For  
other bus controllers or languages, you must determine what form of hardware handshake is used. You  
may have to build a customized cable to connect the holdoff lines as necessary. If your bus controller  
does not use hardware handshaking, tie the DSR input to the ac source to a signal that is always true.  
This implies that your bus controller must always be ready to accept data. You may want to set the baud  
rate to either 2400 or 4800 baud to ensure that this is true.  
bus controller  
ac source  
TxD (3)  
RxD (2)  
DTR (4)  
TxD (3)  
RxD (2)  
*DTR (4)  
*DSR (6)  
DSR (6)  
Ground (5)  
Ground (5)  
Figure 2-7. Null Modem Interface Lines  
Response Data Terminator  
All RS-232 response data sent by the ac source is terminated by the ASCII character pair <carriage  
return><newline>. This differs from GPIB response data which is terminated by the single character  
<newline>.  
24  
3
Turn-On Checkout  
Introduction  
Successful tests in this chapter provide a high degree of confidence that the ac source is operating  
properly. For verification tests, see appendix B. Complete performance tests are given in the Service  
Guide.  
NOTE:  
This chapter provides a preliminary introduction to the ac source front panel. See  
Chapter 4 for more details.  
Preliminary Checkout  
WARNING: LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH  
on contact may result if the output terminals or circuits connected to the output are  
touched when power is applied.  
1.  
2.  
3.  
If you have not already done so, connect the power cord to the ac source and plug it in.  
Turn the front panel power switch to ON (1).  
The ac source undergoes a self-test when you turn it on. The following items appear on the  
display:  
a. A brief pattern that lights all display segments, followed by the model number and the  
software revision number.  
b. The display then goes into the meter mode with the Dis annunciator on, and all others off.  
"Meter mode" means that the VOLTS digits indicate the output voltage and the FREQ digits  
indicate the output frequency. The voltage will be at or near zero and the frequency will be at 60  
Hertz.  
NOTE:  
If the ac source detects an error during self-test, the Err annunciator on the display will  
be lit. Pressing the Shift and Error keys will show the error number. Go to "In Case of  
Trouble" at the end of this chapter.  
4.  
5.  
6.  
Check that the ac source fan is on. You should be able to hear the fan and feel the air coming  
from the unit.  
Press Output on/off once. The Dis annunciator will go off and the CV annunciator will go on.  
If the programmed voltage is less than 20% of the voltage range, the Unr annunciator may go on.  
Turn the unit off.  
25  
3 - Turn-On Checkout  
Using the Keypad  
(shift)  
Some of the front panel keys perform two functions, one labeled in black and  
the other in blue. You access the blue function by first pressing the blue  
shift key. Release the key after you press it. The Shift annunciator will be on,  
indicating that you have access to any key’s shifted function.  
And  
and  
These keys let you scroll up and down through the choices in the presently  
selected function menu. All menu lists are circular; you can return to the  
starting position by continuously pressing either key.  
These keys let you select the previous or the next parameter for a specific  
command. If the command has a numeric range, these keys increment or  
decrement the existing value.  
É
The backspace key is an erase key. If you make a mistake entering a digit and  
have not yet pressed Enter, you can delete the digit by pressing -. Delete  
more digits by repeatedly pressing this key.  
Enter  
Executes the entered value or parameter of the presently accessed command.  
Until you press this key, the parameters you enter with the other keys are  
displayed but not entered into the ac source. After pressing Enter, the ac  
source returns to Meter mode in most cases. In Harmonic or List mode, the ac  
source displays the next point in the list.  
Checkout Procedure  
WARNING: LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH  
on contact may result if the output terminals or circuits connected to the output are  
touched when power is applied.  
The output test requires that you connect light bulbs to the output of the unit and apply a  
potentially hazardous voltage of 120 Vac. Properly shield all connections and wires.  
The test in this section checks for output voltage and current on the ac source by having you connect light  
bulbs to the output of the unit. The following equipment is recommended for performing this output  
checkout procedure:  
1 - 100 W light bulb for Agilent 6814B/6843A; 3 - 100 W light bulbs for Agilent 6834B  
1 - light bulb socket for Agilent 6814B/6843A; 3 - sockets for Agilent 6834B  
wires for connecting socket to the unit  
NOTE:  
When the ac source is turned on as shipped from the factory, it asserts the *RST state.  
You can subsequently program the unit to turn on according to the state stored in *RCL  
location 0, as explained in Chapter 4. The following procedures assume that the unit  
turns on in the *RST state.  
26  
Turn-On Checkout - 3  
Make sure that the unit is turned off, and make the following connections to the output. If you are  
verifying a single phase source, you only need to connect one bulb.  
Figure 3-1.Verification Connections  
Procedure  
Display  
Explanation  
1.  
2.  
Turn the unit on.  
Meter mode  
Meter mode is active and the Dis annunciator should be  
on.  
VOLT 0.00  
Display indicates the default settings.  
If you are verifying a three phase source, all phase  
annunciators should be on.  
Press the Voltage key.  
3.  
4.  
VOLT 0.00  
VOLT 120  
Single phase units use only phase 1.  
Press Phase Select  
until only φ1 is lit.  
Programs the output on phase 1 to 120 Vrms. After the  
value is entered, the display returns to Meter mode,  
which indicates that no voltage is applied to the output.  
Press 1, 2, 0, Enter  
5.  
120 V 60 Hz  
Turns the output on and applies 120 volts to the phase 1  
light bulb. The Dis annunciator should be off and CV  
should be on.  
Press Output On/Off  
If you are verifying three phase sources, repeat steps 2 through 4 for phase 2 and phase 3. All three  
light bulbs should be lit when this action is complete.  
Continue with step 6 of you are verifying three phase sources. Otherwise skip to step #10.  
6.  
7.  
VOLT 120  
VOLT 120  
Press the Voltage key.  
Press Phase Select  
until all phase  
annunciators are lit  
8.  
VOLT 0  
Turns off all light bulbs connected to the three-phase  
source.  
Press 0, Enter  
9.  
VOLT 120  
PROT:CLEAR  
Turns on all light bulbs connected to the three-phase  
source.  
Press Voltage 1, 2, 0,  
Enter  
10.  
Display accesses the protection menu list.  
Press Protect  
27  
3 - Turn-On Checkout  
Procedure  
Display  
Explanation  
11.  
12.  
Press  or ô and scroll  
to the VOLT:PROT item  
VOLT:PROT 500  
Display shows the overvoltage protection trip voltage  
for your unit. The overvoltage protection voltage is  
programmed in peak, not rms volts.  
VOLT:PROT 160  
0 V 60 Hz  
Programs the OVP to 160 Vpeak, the rms value of  
which is less than the previously set rms voltage.  
Press 1, 6, 0, Enter  
Because the peak OVP voltage entered was less than the  
rms output voltage, the OVP circuit tripped. The output  
dropped to zero, CV turned off, and Prot turned on.  
13.  
VOLT:PROT 320  
Programs the OVP to a peak value that is greater than  
the rms output voltage value.  
Note: You cannot clear an OVP trip until you have first  
removed the cause of the condition.  
Press Protect, scroll to  
the VOLT:PROT item,  
and press 3, 2, 0, Enter  
14.  
15.  
16.  
120 V 60 Hz  
CURR:LEV 5  
CURR:LEV .5  
Executes the PROT:CLEAR command, restoring the  
output. Prot turns off and CV turns on.  
Press Protect, and  
Enter  
Indicates the default output current limit setting.  
Press Shift, and  
Current  
Press . 5 Enter  
Sets the current limit to .5 amperes. The CC  
annunciator is on, indicating that the unit is in current  
limit mode and the light bulbs are dimmer because the  
output voltage has dropped in its attempt to limit output  
current.  
17.  
CURR:PROT ON  
You have enabled the overcurrent protection circuit.  
The circuit then tripped because of the output short. The  
CC annunciator turns off and the OCP and Prot  
annunciators come on. The output current is near zero.  
Press Protect, scroll to  
the CURR:PROT item,  
and press ° to select ON.  
Then press Enter.  
18.  
19.  
0.5 V 60 Hz  
The output is off and the Dis annunciator turns on.  
Press Output On/Off  
CURR:PROT OFF  
You have disabled the overcurrent protection circuit.  
The Prot annunciator turns off.  
Press Protect, scroll to  
the CURR:PROT item,  
press ° to select OFF,  
then press Enter.  
20.  
Turn the unit off.  
The next time the unit turns on it will be restored to the  
*RST or factory default state  
28  
Turn-On Checkout - 3  
In Case of Trouble  
Error Messages  
Ac source failure may occur during power-on selftest or during operation. In either case, the display may  
show an error message that indicates the reason for the failure.  
Selftest Errors  
Pressing the Shift and Error keys will show the error number. Selftest error messages appear as:  
ERROR <n>, where "n" is a number listed in the following table. If this occurs, turn the power off and  
then back on to see if the error persists. If the error message persists, the ac source requires service.  
Table 3-1. Power-On Selftest Errors  
Error No.  
Error 0  
Failed Test  
No error  
Error 1  
Non-volatile RAM RD0 section checksum failed  
Non-volatile RAM CONFIG section checksum failed  
Non-volatile RAM CAL section checksum failed  
Non-volatile RAM WAVEFORM section checksum failed  
Non-volatile RAM STATE section checksum failed  
Non-volatile RAM LIST section checksum failed  
RAM selftest  
Error 2  
Error 3  
Error 4  
Error 5  
Error 6  
Error 10  
Error 11 to 18  
DAC selftest 1 to 8  
Runtime Error Messages  
Under unusual operating conditions, the front panel display may show OVLD. This indicates that the  
output voltage or current is beyond the range of the meter readback circuit. If the front panel display  
indicates -- -- -- -- -- -- , a GPIB measurement is in progress. Appendix C lists other error messages that  
may appear at runtime.  
Line Fuse  
If the ac source appears "dead" with a blank display and the fan not running, first check your power  
source to be certain line voltage is being supplied to the ac source. If the power source is normal, the ac  
source line fuse may be defective. If the ac source has a defective fuse, replace it only once. If it fails  
again, investigate the reason for the failure. Proceed as follows:  
1.  
Turn off the front panel power switch and remove the input power (unplug the power cord or  
open the safety disconnect).  
2.  
3.  
4.  
5.  
Remove the fuse cover from the rear panel.  
Unscrew the fuse caps and remove the fuses.  
If any fuses are defective, replace all three with fuses of the same type (see Chapter 1).  
Turn on the ac source and check the operation. If it is normal. replace the fuse cover.  
Maintenance Note: It is recommended that new fuses be installed every four years.  
29  
4
Front panel Operation  
Introduction  
Here is what you will find in this chapter:  
a complete description of the front panel controls  
front panel programming examples that describe:  
how to program the output voltage and frequency  
how to measure the output  
how to program the output pulses and lists  
how to trigger output changes  
Front Panel Description  
Figure 4-1. Front Panel, Overall View  
31  
4 - Front Panel Operation  
14-character vacuum fluorescent display for showing programmed commands  
and measured values.  
j Display  
Annunciators light to indicate operating modes and status conditions:  
k Annunciators  
φ1, φ2, φ3 Phase 1, 2, or 3 is being controlled or metered.  
CV  
CC  
The ac source output is in constant-voltage mode.  
The ac source output is in constant-current mode.  
Unr The ac source output is in an unregulated state.  
Dis The ac source output is disabled (off).  
Tran The ac source output is initialized to output a transient.  
OCP The overcurrent protection state is enabled.  
Prot One of the ac source’s output protection features is activated.  
Cal  
The ac source is in calibration mode.  
Shift The Shift key is pressed to access an alternate key function.  
Rmt The selected interface (GPIB or RS-232) is in a remote state.  
Addr The interface is addressed to talk or to listen.  
Err There is a message in the SCPI error queue.  
SRQ The interface is requesting service from the controller.  
Meter Front panel measurement functions are: ac only, dc only, or ac+dc  
AC+DC  
Output The ac source output coupling is: ac only, or ac+dc  
AC+DC  
The rotary pulse generators let you set the output voltage and frequency when the  
ac source is in local mode. Their response is rate sensitive.  
l Voltage/  
Frequency  
Turning a control rapidly provides coarse control of the value.  
Turning a control slowly provides fine control of the value.  
This turns the ac source on or off.  
n Line  
The system keys let you:  
o System Keys  
Return to Local mode (front panel control)  
Set the ac source GPIB address  
Set the RS-232 interface communication baud rate and parity bit  
Display SCPI error codes and clear the error queue  
Save and recall up to 4 instrument operating configurations  
Function access command menus that let you:  
Program output voltage, current limit, frequency, and output waveforms  
Turn the output on and off  
p Function Keys  
Select metering functions  
Send immediate triggers from the front panel  
Program transient output functions  
Set and clear protection functions  
Select output phases  
Select the coupling for output and meter functions  
Monitor instrument status  
Entry keys let you:  
q Entry Keys  
Enter programming values  
Increment or decrement programming values  
Calibrate the ac source  
32  
Front Panel Operation - 4  
System Keys  
Refer to the examples later in this chapter for more details on the use of these keys.  
SYSTEM  
Local  
Error  
Address  
Save  
Recall  
Figure 4-2. System Keys  
Shift  
This is the blue, unlabeled key, which is also shown as  
Pressing this key accesses the alternate or shifted function of a key (such as  
ERROR ). Release the key after you press it. When the Shift annunciator is lit,  
the shifted keys are active.  
in this guide.  
Local  
Press to change the ac source’s selected interface from remote operation to local  
(front panel) operation. Pressing the key will have no effect if the interface state  
is already Local, Local-with-Lockout, or Remote-with-Lockout.  
Address  
Press to access the system address menu. This menu lets you configure the ac  
source’s interface and other system parameters. Address Menu entries are stored  
in non-volatile memory.  
Display  
ADDRESS <value>  
Command Function  
Sets the GPIB Address  
INTF <char>  
Selects an interface (GPIB or RS232)  
BAUDRATE<value> Selects baud rate (300, 600, 1200, 2400, 4800, 9600)  
PARITY <char>  
LANG <char>  
Message parity (NONE, EVEN, ODD, MARK, SPACE)  
Selects language (SCPI or E9012)  
NOUTPUTS <char>  
Select number of output phases on Agilent 6834B only (1 or 3)  
value = a numeric value  
char = a character string parameter  
Use  
Use  
and  
and  
to scroll through the command list.  
to scroll through the parameter list.  
Recall  
Shift  
Press to place the ac source into a previously stored state. You can recall up to  
16 (0 through 15) previously stored states.  
Error  
Save  
Press to display the system error codes stored in the SCPI error queue. This  
action also clears the queue. If there is no error in the queue, 0 is displayed.  
Shift  
Press to store an existing ac source state in non-volatile memory. The parameters  
saved are listed under *SAV in the ac source Programming Guide. You can  
save up to 16 states (0 through 15).  
33  
4 - Front Panel Operation  
Function Keys  
Refer to the examples later in this chapter for more details on the use of these keys.  
FUNCTION  
Current  
Harmonic  
Meter  
Index  
Voltage  
Phase  
Freq  
Output  
Input  
Index  
Status  
Shape  
Phase  
Protect  
Select  
List  
Trigger  
Output  
on/off  
Trigger  
Control  
Pulse  
Figure 4-3. Function Keys  
Immediate Action Keys  
Immediate action keys immediately execute their corresponding function when pressed. Other function  
keys have commands underneath them that are accessed when the key is pressed.  
Output  
On/Off  
This key toggles the output of the ac source between the on and off states. It  
immediately executes its function as soon as you press it. When off, the ac  
source output is disabled and the Dis annunciator is on.  
Phase  
Select  
This key only applies to three-phase ac sources. It selects the phase to which  
function commands will be sent, as well as the phase that will be monitored by  
the Meter and Harmonic functions. At power-on, all phases are selected or  
coupled, indicating that commands will be sent to all phases. The presently  
selected phase is indicated by a phase annunciator. Pressing Phase Select  
immediately selects a different phase. Phase selection is circular; you can return  
to the starting position by continuously pressing Phase Select.  
Annunciator On Phase Selected  
φ1, φ2, φ3  
All phases selected (phases coupled= ALL)1  
Phase #1 selected (phases coupled= NONE)  
Phase #2 selected (phases coupled= NONE)  
Phase #3 selected (phases coupled= NONE)  
φ1  
φ2  
φ3  
1 Does not apply to Meter or Harmonic functions.  
When the Meter and Harmonic functions are active, Phase Select only rotates  
through 1, 2, and 3. This is because the Meter and Harmonic functions cannot  
display multiple phase readings simultaneously. Therefore, it is not possible to  
select all phases with these functions.  
Shift  
Trigger  
Sends an immediate trigger to the ac source  
34  
Front Panel Operation - 4  
Scrolling Keys  
Scrolling keys let you move through the commands in the presently selected function menu.  
These scroll keys let you move through the choices in a command list.  
Press  
to bring up the next command in the list. Press  
to go back  
to the previous command in the list. Function menus are circular; you can  
return to the starting position by continuously pressing either key. The  
following example shows the commands in the Input function menu:  
Shift  
Shift  
Index  
Index  
These shifted scroll keys apply only to the Harmonic and List functions.  
Press these keys to step through integers 0 through 50 when specifying the  
desired harmonic number, or 0 through 99 when specifying the desired list  
point. Hold down these keys to rapidly access any harmonic or list point.  
¯
°
These Entry keys let you scroll through choices in a parameter list that apply  
to a specific command. Parameter lists are circular; you can return to the  
starting position by continuously pressing either key. If the command has a  
numeric range, these keys increment or decrement the existing value.  
Meter Display Keys  
Metering keys control the metering functions of the ac source.  
Meter  
Press this key to access the meter menu list.  
Display  
Measurement  
<reading>V <reading>Hz  
<reading>V <reading>A  
<reading>A <reading>Hz  
<reading>V <reading>W  
<reading> CREST F  
<reading>A PK REP  
<reading>A PK NR  
<reading> VA  
rms voltage and frequency (the default)  
rms voltage and rms current  
rms current and frequency (the default)  
rms voltage and power  
current crest factor  
peak current, repetitive  
peak current, nonrepetitive1  
apparent power  
<reading> VAR  
reactive power  
<reading>W TOTAL  
<reading> PFACTOR  
<reading>A NEUTRAL  
total power of all phases2  
power factor  
neutral rms current2  
Input  
Press this key to specify the following metering functions.  
Display  
INP:COUP <char>  
WINDOW <char>  
Command Function  
Choose meter coupling (AC, DC or ACDC)  
Select harmonic measurement window meter  
(KBESSEL, RECT)  
Notes:  
1Displays the highest peak current since it was last cleared. The value is cleared when  
Enter  
Clear Entry  
you scroll into this selection or press  
or  
2This selection only valid for Agilent 6834B  
reading = the returned measurement  
char = a character string parameter  
and  
and  
scroll through the command list.  
scroll through the parameter list.  
35  
4 - Front Panel Operation  
Shift  
Harmonic  
Press this key to access the harmonic menu list  
Display  
Measurement  
current harmonic magnitude  
current harmonic phase  
voltage harmonic magnitude  
voltage harmonic phase  
neutral current harmonic magnitude  
neutral current harmonic phase  
current total % harmonic distortion  
voltage total % harmonic distortion  
<reading>A I:MAG: <index>  
<reading>° I:PHASE: <index>  
<reading>V V:MAG: <index>  
<reading>° V:PHASE: <index>  
<reading> N:MAG: <index>  
<reading>° N:PHASE: <index>  
<reading>° CURR:THD  
<reading>° VOLT:THD  
Output Control Keys  
Output control keys control the output functions of the ac source.  
Voltage  
Press this key to access the voltage menu list.  
Display  
Command Function  
VOLT <value>  
Set immediate rms output voltage (φ)  
VOLT:T<value>  
VOLT:M <char>  
RANGE <char>  
SLEW <value>  
SLEW:T<value>  
SLEW:M <char>  
ALC <char>  
Set triggered rms output voltage (φ)  
Select the voltage mode (φ) (FIXED, STEP, PULSE or LIST)  
Select the voltage range (φ) (150 or 300)  
Set immediate voltage slew rate in volts/second (φ)  
Set triggered voltage slew rate in volts/second (φ)  
Select the voltage slew mode (φ) (FIXED, STEP, PULSE or LIST)  
Select the voltage sense source (INT or EXT)  
Shift  
Freq  
Current  
Press this key to access the current menu list.  
Display Command Function  
CURR:LEV <value> Set immediate rms output current limit  
Press this key to access the frequency menu list.  
Display  
Command Function  
Set immediate output frequency  
Set triggered output frequency  
Select the frequency mode (FIXED, STEP, PULSE or LIST)  
Set immediate frequency slew rate in volts/second  
Set triggered frequency slew rate in volts/second  
Select the frequency slew mode (FIXED, STEP, PULSE or LIST)  
FREQ <value>  
FREQ:T<value>  
FREQ:M <char>  
SLEW <value>  
SLEW:T<value>  
SLEW:M <char>  
Notes:  
φ = phase selectable on Agilent 6834B  
reading = the returned measurement  
index = a numeric value that represents the harmonic number from 0 to 50  
char = a character string parameter  
and  
and  
scroll through the command list.  
scroll through the parameter list.  
Index  
Index  
and  
specify the desired harmonic.  
36  
Front Panel Operation - 4  
Shift  
Phase  
Press this key to access the phase menu list.  
Display  
Command Function  
PHASE <value>  
Set immediate output phase (φ)  
PHASE:T <value>  
PHASE:M <char>  
Set triggered output phase (φ)  
Select the phase mode (φ) (FIXED, STEP, PULSE or LIST)  
Shape  
Press this key to access the shape menu list.  
Display  
SHAPE <char>  
Command Function  
Select the immediate output wave shape 1 (SINE, SQUARE,  
or CSINE) CSIN = clipped sine wave  
SHAPE:T <char>  
Select the triggered output wave shape (SINE, SQUARE, or  
CSINE) CSIN = clipped sine wave  
SHAPE:M <char>  
CLIP <value>  
Select the shape mode (FIXED, STEP, PULSE or LIST)  
Set the clipping level of the CSIN wave shape. This  
specifies the point where clipping starts as a percentage of  
the peak amplitude or percentage of THD.  
Pulse  
Press this key to access the pulse menu list.  
Display  
Command Function  
Set the pulse width  
Set the number of output pulses  
Set the pulse duty cycle as a percentage of the pulse period  
Set the pulse period  
WIDTH <value>  
COUNT <value>  
DCYCLE <value>  
PER <value>  
HOLD <char>  
Set the parameter that will be held constant as the other  
parameters change (WIDTH or DCYCLE)  
Shift  
Output  
Press this key to access the output menu list.  
Display  
*RST  
Command Function  
Execute *RST command to place the ac source in the  
factory-default state  
TTLT:SOUR <char>  
Select Trigger Out source coupling (BOT, EOT or LIST)  
BOT = beginning of transient  
EOT = end of transient  
LIST = TTLT trigger (see Programming Guide)  
TTLT:STATE <value> Set Trigger Out state (ON or OFF)  
PON:STATE <char>  
RI <char>  
DFI <char>  
Select power-on state command (RST or RCL0)  
Sets remote inhibit mode (LATCHING, LIVE, or OFF)  
Sets discrete fault indicator state (ON or OFF)  
Select the DFI source (QUES, OPER, ESB, RQS, or OFF)  
(see Chapter 4 of Programming Guide)  
DFI:SOUR <char>  
Notes:  
1 User defined waveshapes will also appear in this list when created.  
φ = phase selectable on Agilent 6834B  
value = a numeric value  
char = a character string parameter  
and  
and  
scroll through the command list.  
scroll through the parameter list.  
37  
4 - Front Panel Operation  
Protection and Status Control Keys  
The Protect and Status keys control the protection functions and status registers of the ac source. Refer to  
Chapter 4 of the Programming guide for more information on the status registers.  
Protect  
Press this key to access the protection menu list.  
Display  
PROT:CLEAR  
Command Function  
Clear the status registers of all activated protection signals.  
The fault causing a signal must be corrected or removed  
before the register can be cleared.  
CURR:PROT <char>  
VOLT:PROT <value>  
DELAY <value>  
Set overcurrent protection function (ON or OFF).  
Set the overvoltage protection level1  
Set the time delay for activating a protection fault after  
programming the output  
Shift  
Status  
Press this key to access the status menu list. Note that in the following list, commands  
ending in ? clear the registers when they are read. For this reason the registers are read  
Enter  
only after you press  
, not when you scroll to the command  
Display  
*CLS  
STATUS:PRESET  
*ESR? <value>  
*STB <value>  
Command Function  
Executes the clear status (*CLS) command  
Execute the STATus:PRESet command  
Return Event Status register value  
Return Status Byte register value  
OPER:EVEN? <value> Return STAT:OPER:EVENT? value  
OPER:COND <value> Return STAT:OPER:COND? value  
QUES:EVEN? <value> Return STAT:QUES:EVENT? value  
QUES:COND <value>  
Return STAT:QUES:COND? value  
Notes:  
1Programmed in peak volts. (Other voltage parameters are programmed in rms volts)  
value = a numeric value  
char = a character string parameter  
and  
and  
scroll through the command list.  
scroll through the parameter list.  
38  
Front Panel Operation - 4  
Trigger and List Control Keys  
The Trigger Control key controls output transient triggers. The List key controls the generation of output  
lists. A list can contain up to 100 points, each of which can specify an output change (or transient). Refer  
to Chapter 4 of the Programming Guide for more information about programming triggers and lists.  
Trigger  
Control  
Press this key to access the trigger control menu list.  
Display  
INIT:IMMED  
INIT:CONT <char>  
TRIG:SOUR <char>  
Command Function  
Initiate the transient trigger sequence immediately.  
Set continuous trigger initiation (ON or OFF).  
Select transient trigger source (BUS, EXT, TTLT or  
IMM).  
DELAY <value>  
ABORT  
Set trigger delay in seconds.  
Abort all trigger sequences.  
SYNC:SOUR <char>  
SYNC:PHASE <value>  
Select trigger sync source (PHASE or IMM).  
Set synchronous phase reference angle in degrees.  
Shift  
List  
Press this key to access the list commands  
Display  
COUNT <value>  
Command Function  
Specifies the number of times a list repeats.  
List of output dwell times.  
DWEL:<index> <value>  
FREQ:<index> <value>  
FSLW:<index> <value>  
PHASE:<index> <value>  
SHAP:<index> <char>  
List of output frequencies.  
List of output frequency slew rates  
List of output voltage phase angles (φ)  
List of output waveform shapes.1  
(SINE, SQUARE or CSIN) CSIN = clipped sine wave  
Response of list to triggers (ONCE or AUTO).  
List of Trigger Out pulses (0=no pulse; 1=pulse).  
List of ac output voltages (φ)  
STEP<char>  
TTLT:<index> <value>  
VOLT:<index> <value>  
VSLW:<index> <value>  
List of output voltage slew rates (φ)  
Notes:  
1User-defined waveshapes will also appear in this list when created.  
φ = phase selectable on Agilent 6834B  
value = a numeric value  
char = a character string parameter  
index = a numeric value that represents a list point from 0 to 99  
and  
and  
scroll through the command list.  
scroll through the parameter list.  
Index  
Index  
and  
scroll through the desired list points. EOL is displayed when the  
automatically  
truncates or clears the list at the  
end of the list is reached. When a value is edited, pressing  
advances to the next list point. Pressing  
presently displayed list point.  
Enter  
Clear Entry  
39  
4 - Front Panel Operation  
Entry Keys  
Refer to the examples later in this chapter for more details on the use of these keys.  
ENTRY  
Calibration  
7
4
8
5
2
9
6
Enter  
1
3
E
Clear Entry  
-
.
0
Figure 4-4. Entry Keys  
These keys let you scroll through choices in a parameter list that apply to a  
specific command. Parameter lists are circular; you can return to the starting  
position by continuously pressing either key. If the command has a numeric  
range, these keys increment or decrement the existing value.  
0
.
9
0
9
.
through  
are used for entering numeric values.  
is the decimal  
point. For example, to enter 33.6 press: 3 3 . 6 Enter.  
-
The backspace key deletes the last digit entered from the keypad. This key lets  
you correct one or more wrong digits before they are entered.  
Enter  
This key executes the entered value or parameter of the presently accessed  
command. Until you press this key, the parameters you enter with the other  
Entry keys are displayed but not entered into the ac source. Before pressing  
Enter  
you can change or abort anything previously entered into the display.  
After Enter is pressed, the ac source returns to Meter mode in most cases. In  
Harmonic or List mode, the ac source displays the next point in the list.  
E
Shift  
This key specifies an exponential power of 10. For example, the value for  
100µs can be entered as either . 0 0 0 1 , or as 1 E 4  
Shift  
Shift  
This key is the minus sign.  
This key aborts a keypad entry by clearing the value. This key is convenient for  
correcting a wrong value or aborting a value entry. The display then returns to  
Clear Entry  
Clear Entry  
the previously set function. When editing a list, pressing  
truncates  
or clears the list at the presently displayed list point.  
Shift  
This key accesses the calibration menu (Refer to Appendix B to calibrate your  
ac source).  
Calibration  
40  
Front Panel Operation - 4  
Examples of Front Panel Programming  
You will find these examples on the following pages:  
1
2
3
4
5
6
7
8
9
10  
Setting the output voltage amplitude  
Setting the output frequency  
Setting the overcurrent protection feature  
Generating step, pulse, and list transients  
Programming trigger delays and phase synchronization  
Programming slew rates  
Measuring peak inrush current  
Setting the GPIB address or RS-232 parameters  
Saving and recalling operating states  
Switching between single- and three- phase operation (Agilent 6834B only)  
The examples in the ac source Programming Guide are similar to the ones in this section, except that they  
use SCPI commands.  
1 - Setting the Output Voltage Amplitude  
NOTE:  
The maximum voltage that the ac source can output is limited by the peak value of the  
waveform, which is 425 Vpeak. Since the output is programmed in units of rms volts, the  
maximum value that can be programmed is dependent on the peak-to-rms ratio of the  
selected waveform. For a sinewave, the maximum ac voltage that can be programmed is  
300 Vrms. For other waveforms the maximum may be different.  
Procedure for Single-Phase AC Sources  
When you turn on the ac source, the default output shape is a 60 Hz sinewave at 0 Vrms. There is no  
output from the ac source because the default output state is OFF, as indicated by the Dis annunciator.  
Set the output to 120 V rms as follows:  
Action  
Display  
You can set the voltage in any of three ways:  
1.  
VOLT 120  
VOLT 127  
On the Function keypad, press Voltage. On the Entry keypad, press 1 2 0 Enter.  
This is the easiest way to enter an accurate value.  
2.  
On the Function keypad, press Voltage. On the Entry keypad, press ¯ or ° to  
increment or decrement the existing value. This technique is useful when you are  
making minor changes to an existing value.  
3
Rotate the front panel Voltage knob to obtain 120 V. This method is best when you  
want to enter a value without using the voltage menu.  
120 V 60 Hz  
Note: You will not see the new voltage on the front panel meter unless the output is  
enabled.  
To enable the output:  
4.  
120 V 60 Hz  
On the Function keypad, press Output On/Off. The Dis annunciator will go off,  
indicating that the voltage is now applied to the output terminals.  
41  
4 - Front Panel Operation  
Procedure for Three-Phase AC Sources  
If you have a three-phase ac source, you can set the rms voltage of all three phases identically, or set each  
one differently. This is controlled via the Phase Select Menu on the Function keypad.  
The following example shows how you can set the phase 1 output to 120 Vrms, phase 2 to 180 Vrms,  
and phase 3 to 235 Vrms.  
Action  
Display  
1.  
2.  
VOLT  
0
0
On the Function keypad, press Voltage. Note that in the power-on default state, the  
φ1, φ2, and φ3 annunciators are all lit, indicating that any command sent to the  
instrument will be sent to all three phases.  
VOLT  
Scroll through the phase selections by pressing Phase Select  
Pressing Phase Select moves you through phases 1, 2, and 3, as indicated by the  
phase annunciators. Pressing it once more returns you to the first state with all three  
phase annunciators on.  
3.  
4.  
5.  
6.  
VOLT 120  
VOLT 180  
VOLT 235  
235 V 60 Hz  
While in the Voltage menu press Phase Select to access Phase 1. On the Entry pad  
press 1 2 0 Enter.  
Access the Voltage menu again and press Phase Select once to access Phase 2. On  
the Entry pad press 1 8 0 Enter.  
Access the Voltage menu again and press Phase Select once to access Phase 3. On  
the Entry pad press 2 3 5 Enter.  
Press Output On/Off to enable the output. The Dis annunciator will go off,  
indicating that the voltages are now applied to the output terminals.  
To verify the output, you can measure it as follows:  
7.  
235 V 60 Hz  
120 V 60 Hz  
180 V 60 Hz  
235 V 60 Hz  
Note that the φ3 annunciator is on, indicating that you are monitoring the last phase  
you selected, which was Phase 3.  
8.  
Press Phase Select once. The φ1 annunciator will light, indicating that you are  
now monitoring Phase 1.  
9.  
Press Phase Select once. The φ2 annunciator will light, indicating that you are  
now monitoring Phase 2.  
10.  
Press Phase Select once. The φ3 annunciator will light, indicating that you are  
now monitoring Phase 3 again.  
NOTE:  
The Meter menu does not go to the all-phases state present in the Phase Select menu  
because the front panel can display only one phase at a time. Refer to the ac source  
Programming Guide on how to return simultaneous measurements from all three phases.  
42  
Front Panel Operation - 4  
2 - Setting the Output Frequency  
When you turn on the ac source, the default output frequency is a 60 Hz. Assuming the voltage output  
from example 1 is in effect (120 Vrms sinewave), change the frequency to 50 Hz as follows:  
Action  
Display  
You can set the frequency in the same way that you set the voltage:  
1.  
2.  
FREQ 50  
FREQ 50  
On the Function keypad, press Freq. On the Entry keypad, press 5 0 Enter.  
On the Function keypad, press Freq. On the Entry keypad, press ¯ or ° to  
increment or decrement the existing value.  
3.  
Rotate the front panel Frequency knob to obtain 50 Hz.  
FREQ 50  
To verify the output, you can measure it as follows:  
4.  
120 V 50 Hz  
On single-phase ac sources, the φ1 annunciator is lit. On three-phase ac sources, the  
phase annunciator of the last selected phase will be lit. The Meter menu is presently  
displaying the measured voltage and frequency of the selected output phase.  
You can scroll through all of the measurement functions in the Meter Menu by  
pressing the  and ô keys.  
3 - Setting a Protection Feature  
You can set the ac source to disable its output if it detects an overvoltage or overcurrent fault condition.  
Other automatic fault conditions (such as overtemperature) also will disable the output. Set the  
overcurrent protection feature as follows:  
Action  
Display  
1.  
2.  
3.  
PROT:CLEAR  
On the Function keypad, press Protect.  
Press ° to obtain the overcurrent command.  
CURR:PROT OFF  
CURR:PROT ON  
On the Entry keypad, press once to scroll to the ON parameter and press Enter. The  
OCP annunciator will light, indicating that the overcurrent protection circuit is on.  
CURR:PROT ON  
DELAY .1  
If you wish to set a time delay between the detection of the fault and the disabling of  
the output, scroll to the delay command on the protection menu. The default delay is  
100 milliseconds.  
DELAY .250  
PROT:CLEAR  
Enter the delay from the Entry keypad, such as . 2 5 0 Enter.  
4.  
When you want to restore normal operation after the cause of the overcurrent  
condition has been removed, scroll to the protection clear command and press  
Enter. The OCP annunciator then will go off.  
43  
4 - Front Panel Operation  
4 - Using Transient Voltage Modes  
The ac source voltage can be programmed in the following transient operating modes:  
STEP  
PULSE  
causes the output to permanently change to its triggered value.  
causes the output to change to its triggered value for a specific time, as determined by the  
Pulse menu parameters.  
LIST  
causes the output to sequence through a number of values, as determined by points entered  
in the List menu.  
FIXED  
disables transient operation for the selected function.  
Step Transient  
The Voltage Menu lets you specify an alternate or triggered voltage level that the ac source will apply to  
the output when it receives a trigger. Because the default transient voltage level is zero volts, you must  
first enter a triggered voltage before you can trigger the ac source to change the output amplitude. Refer  
to Chapter 4 of the Programming Guide for more information about programming triggers.  
In the following example, the voltage output is set to 120 Vrms and then stepped down to 102 Vrms.  
Action  
Display  
1.  
0 V 60 Hz  
On the Function keypad, press Output On/Off to enable the output. The Dis  
annunciator will go off.  
2.  
3.  
VOLT 120  
VOLT:T 0  
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 2 0 Enter.  
Access the Voltage Menu again and press ô to access the triggered voltage  
command.  
4.  
5.  
VOLT:T 102  
On the Entry keypad, press 1 0 2 Enter.  
Access the Voltage Menu again and press ô to access the voltage mode command. It  
should be in the default FIXED mode. An ac source function in the FIXED mode  
does not respond to triggers. On the Entry keypad, press ¯ or ° to scroll through  
the mode parameters. When you have STEP, press Enter.  
VOLT:M STEP  
6.  
7.  
INIT:IMMED  
102 V 60 HZ  
Press Trigger Control and Enter. This initiates (or enables) one immediate trigger  
action.  
Press Shift Trigger. This sends the ac source an immediate trigger signal to change  
the output voltage. The triggered voltage value now becomes the VOLT value.  
On three-phase ac sources the voltage steps are phase selectable. You can output a different voltage  
step for each phase. To do this, use Phase Select to first choose the desired phase, as previously  
described in example 1 for setting the immediate output voltage.  
44  
Front Panel Operation - 4  
Pulse Transient  
In the following example, the output is four 83.3-millisecond, 120 Vrms pulses at 60 Hz. The figure  
shows the trigger, pulse count, pulse period, and duty cycle.  
NOTE:  
From the Output Menu, execute the *RST command to reset the ac source. This is  
necessary because any previously programmed functions remain in effect until cleared.  
Trigger  
count = 4  
120Vrms  
102Vrms  
83.3ms  
250ms  
Figure 4-5. Pulse Transients  
Action  
Display  
1.  
2.  
VOLT 102  
VOLT 120  
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 0 2 Enter.  
Press ô to access the triggered voltage command. On the Entry keypad, press 1 2 0  
Enter.  
3.  
Access the Voltage Menu again and press ô to access the voltage mode command. On  
the Entry keypad, press ¯ or ° to scroll through the mode parameters to obtain  
PULSE and press Enter.  
VOLT:M PULSE  
4.  
5.  
6.  
WIDTH .0833  
DCYCLE 33  
Press Pulse to access the Pulse Menu. From the Entry keypad, press  
. 0 8 3 3 Enter to enter a pulse width of 83.3 milliseconds.  
Access the Pulse Menu and press ô to access the duty cycle command. From the Entry  
keypad, press 3 3 Enter to change the duty cycle to 33%.  
Access the Pulse Menu and press ô to access the pulse count. On the Entry keypad,  
press 4 and Enter.  
COUNT  
4
7.  
8.  
INIT:IMMED  
102 V 60 HZ  
Press Trigger Control and Enter to initiate the transient trigger sequence.  
Press Shift Trigger. This sends the ac source an immediate trigger signal to generate  
the four output pulses.  
Note: The ac source output returns to 102 V at the completion of the output pulses.  
On three-phase ac sources the voltage pulses are phase selectable. You can output a different voltage  
pulse for each phase. To do this, use Phase Select to first choose the desired phase, as previously  
described in example 1 for setting the immediate output voltage.  
45  
4 - Front Panel Operation  
List Transient  
Lists are the most flexible means of generating multiple or synchronized transient outputs. The following  
figure shows a voltage output generated from a list. The output shown represents three different ac  
voltage pulses (160 volts for 33 milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150  
milliseconds) separated by 67-millisecond, 0-volt intervals.  
The list specifies the pulses as three voltage points (point 0, 2, and 4), each with its corresponding dwell  
point. The intervals are three zero-voltage points (point 1, 3, and 5) of equal intervals. The count  
parameter causes the list to execute twice when started by a single trigger.  
NOTE:  
From the Output Menu, execute the *RST command to reset the ac source. This is  
necessary because any previously programmed functions remain in effect until cleared.  
Trigger  
160 Vrms  
0
1
3
4
5
2
List Count = 1  
List Count = 2  
Figure 4-6. List Transients  
Action  
Display  
1.  
2.  
3.  
4.  
VOLT:M  
FIXED  
Press Voltage to access the Voltage Menu. Then press ô to access the voltage mode  
command.  
On the Entry keypad, press ¯ or ° to scroll through the mode parameters to obtain LIST  
and press Enter.  
VOLT:M LIST  
COUNT  
2
Access the List Menu by pressing Shift List. The first menu command is the count.  
From the Entry keypad, change the list count from the default (1) to 2. Press Enter.  
Access the List menu again and press ô until you access the dwell time. This specifies  
the "on" time for each voltage point, which is effectively the output pulse width. The first  
dwell point (0) appears in the display. On the Entry keypad, press . 0 3 3 and Enter.  
DWEL 0 .033  
5.  
Pressing the Enter key automatically advances to the step in the list. Enter the following  
values for dwell list points 1 through 5: .067, .083, .067, .150, .067. Press Enter to  
enter each value. When you finish, you will be at point 6, which is the end of the list.  
DWEL 1 .067  
DWEL 2 .083  
DWEL 3 .067  
DWEL 4 .150  
DWEL 5 .067  
DWEL 6 EOL  
Note: Press Shift Index or Shift ôIndex to access and edit any list point.  
46  
Front Panel Operation - 4  
6.  
7.  
Press ô until you access the voltage list. This specifies the amplitude of each output  
point during its corresponding dwell period. The first voltage list point (0) appears in the  
display. On the Entry keypad, press 1 6 0 and Enter.  
VOLT 0 160  
Pressing the Enter key automatically advances to the step in the list. Enter the following  
values for voltage list points 1 through 5: 0, 120, 0, 80, 0. Press Enter to enter each  
value. When you finish, you will be at point 6, which is the end of the list.  
VOLT 1  
0
VOLT 2 120  
VOLT 3  
VOLT 4  
VOLT 5  
0
80  
0
Note: Press Shift Index or Shift ôIndex to access and edit any list point.  
VOLT 6 EOL  
8.  
Press ô until you access the step command. Check that it is at the default mode (AUTO).  
STEP AUTO  
This lets a single trigger run your list for the specified count.  
9.  
0 V 60 Hz  
INIT:IMMED  
0 V 60 Hz  
Press Output On/Off to enable the output. The Dis annunciator will go off.  
Press Trigger Control and Enter to initiate the transient trigger sequence.  
10.  
11.  
Press Shift Trigger. This sends the ac source an immediate trigger to generate the four  
output pulses. The output returns to the immediate value at the end of the list.  
Note: To clear a list, press Clear Entry. This truncates or clears the list at the presently  
displayed list point. Each list must be accessed and cleared separately.  
On three-phase ac sources the voltage lists are phase selectable. You can output a different voltage list  
for each phase. To do this, use Phase Select to first choose the desired phase, as previously described in  
example 1 for setting the immediate output voltage.  
5 - Trigger Delays and Phase Synchronization  
The ac source trigger system also lets you program trigger delays as well as synchronize output changes  
to a specific phase angle of the output waveform.  
In example j, the output transient is triggered immediately at the receipt of the trigger signal. In example  
ô, a delay time of approximately 16.7 milliseconds elapses between the occurrence of the trigger and the  
start of the output transient. In example í, the trigger source is programmed for phase synchronization,  
which means that the transient occurs at the first occurrence of the specified phase angle after the trigger  
signal is received. Example m describes phase synchronization on three phase ac sources.  
Note that phase synchronization is referenced to an internal phase signal. The output of the unit is  
normally offset by 0° with respect to this internal reference. Because synchronized transient events  
always occur with respect to the internal reference, the output will normally be in phase with the value  
programmed for phase synchronization. (The Phase command can be used to change the offset of the  
output with respect to the internal phase reference.)  
47  
4 - Front Panel Operation  
Trigger  
VOLT T level  
1
2
VOLT level  
VOLT T level  
VOLT level  
0.000  
0.0167  
VOLT T level  
VOLT level  
3
0
90  
Figure 4-7. Trigger Delays and Phase Synchronization  
Example  
Display  
VOLT 120  
VOLT:T 150  
VOLT:M STEP  
INIT:IMMED  
VOLT 120  
j
This example uses the default trigger parameters. First, access the Voltage  
menu and program the immediate and triggered voltage levels, followed by  
the voltage transient mode.  
Then press Trigger Control and Enter, followed by Shift Trigger.  
In this example, you will set a trigger delay. First, access the Voltage menu  
and program the immediate and triggered voltage levels, followed by the  
voltage transient mode.  
ô
VOLT:T  
150  
VOLT:M STEP  
DELAY 0  
DELAY .0167  
Press Trigger Control. Then press ô until you access the delay parameter.  
On the Entry keypad, press . 0 1 6 7 Enter.  
INIT:IMMED  
Then press Trigger Control and Enter, followed by Shift Trigger.  
This example uses the phase sync mode with no delay, but synchronized at 90.  
First, access the Voltage menu and program the immediate and triggered  
voltage levels, followed by the voltage transient mode.  
VOLT 120  
VOLT:T 150  
VOLT:M STEP  
í
DELAY 0  
SYNC:SOUR PHASE  
Press Trigger Control. Press ô until you access the delay parameter. If  
necessary, set it to 0. Press ô until you access the sync source command. On  
the Entry keypad, press ° to obtain PHASE. Press Enter.  
SYNC:PHAS 90  
INIT:IMMED  
Access the Trigger Control menu again and press ô to access the sync phase  
reference parameter. On the Entry keypad, program a 90° phase reference by  
entering 9 0 Enter.  
Then press Trigger Control and Enter, followed by Shift Trigger.  
48  
Front Panel Operation - 4  
On three-phase ac sources, phase 1 is normally offset by 0° from the internal phase reference while  
phase 2 and phase 3 are offset by 240° and 120° respectively. Therefore, synchronized transient events  
will occur at the phase angle programmed for the phase 1 output, but at different phase angles on the  
phase 2 and phase 3 outputs.  
This is illustrated in the following figure, where the transient occurs at the 90° angle programmed for the  
phase 1 output, but at 330° and 210° for the phase 2 and 3 outputs, because of the default offsets for  
these outputs.  
Trigger  
0
4
90  
VOLT T level  
01  
VOLT level  
phase = 0  
VOLT T level  
VOLT level  
02  
phase = 240  
0
330  
VOLT T level  
0
VOLT level  
03  
210  
phase = 120  
Figure 4-8. Phase Synchronization on Three-phase Sources  
Example  
Display  
m
VOLT 120  
VOLT:T 150  
VOLT:M STEP  
This example synchronizes a change at 90° on phase 1. First, access the  
Voltage menu and program the immediate and triggered voltage levels,  
followed by the voltage transient mode. Check that the φ1, φ2, and φ3  
annunciators are all lit, indicating that commands will be sent to all three  
phases. If not, press Phase Select until all three annunciators are lit.  
Press Trigger Control. Press ô until you access the sync source command.  
On the Entry keypad, press ° once to obtain PHASE. Press Enter.  
SYNC:SOUR PHASE  
SYNC:PHAS 90  
Access the Trigger Control menu again and press ô to access the sync phase  
reference parameter. On the Entry keypad, program a 90° phase reference by  
entering 9 0 Enter.  
INIT:IMMED  
Then press Trigger Control and Enter, followed by Shift Trigger.  
49  
4 - Front Panel Operation  
6 - Using Slew Rates to Generate Waveforms  
As shown in the previous examples there are a number of ways that you can generate custom waveforms.  
Programmable slew rates provide additional flexibility when customizing waveforms. The following  
figure illustrates how programmable slew rates are applied in the transient operating modes.  
In example , an immediate slew rate of 50 volts/second is used whenever a new output voltage is  
programmed. In example ô, a triggered slew rate of 50 volts/second steps the voltage level to its new  
value. 50 volts/second becomes the new immediate slew rate in step mode. In example í, a triggered  
slew rate of 50 volts/second is used at the start of the pulse. The immediate slew rate of infinity applies at  
the trailing edge of the pulse. In example ÷, the slew rates are set by the values in the voltage slew list.  
New VOLT level  
SLEW rate  
1 SLEW:MODE FIXED  
VOLT:T level  
SLEW:T rate  
2 SLEW:MODE STEP  
SLEW rate  
SLEW rate  
VOLT:T level  
SLEW:T rate  
width  
SLEW:T  
3 SLEW:MODE PULSE  
rate  
SLEW [2]  
SLEW rate  
VOLT level  
SLEW [0]  
SLEW [1]  
4 SLEW:MODE LIST  
SLEW [3]  
TRIGGER  
APPLIED  
LIST  
COMPLETE  
Figure 4-8. Programming Slew Rates  
50  
Front Panel Operation - 4  
Example  
Display  
j
This example uses the immediate slew rate. First, access the Voltage menu  
and press ô until you access the mode command. On the Entry keypad, press  
° to obtain FIXED. Press Enter.  
VOLT:M FIXED  
SLEW 50  
Access the voltage menu and press ô until you access the slew command. On  
the Entry keypad, press 5 0 Enter to program a slew rate of 50 volts/second.  
Whenever a new immediate voltage value is entered, the output will slew to  
the new level at 50 volts/second.  
Step mode uses the triggered slew rate. First, access the Voltage menu,  
program the immediate and triggered voltage levels, and set the slew mode to  
STEP.  
VOLT 120  
ô
VOLT:T  
150  
SLEW:M STEP  
Access the Voltage menu and press ô to access the immediate slew  
SLEW: 9.9+E37  
command. On the Entry keypad, enter a value that equals infinity.  
Access the Voltage menu and press ô until you access the triggered slew  
command. On the Entry keypad, enter a value such as 5 0 Enter, which sets  
the triggered slew rate to 50 volts/second.  
SLEW:T 50  
INIT:IMMED  
Then press Trigger Control and Enter, followed by Shift Trigger.  
After the trigger has been sent, in step mode, the triggered value becomes the  
new immediate value.  
Pulse mode uses the triggered slew rate at the leading edge of the pulse, and  
the immediate slew rate at the trailing edge of the pulse. First, access the  
Voltage menu, program the immediate and triggered voltage levels, and set  
the slew mode to PULSE.  
VOLT 120  
í
VOLT:T  
150  
SLEW:M PULSE  
Access the Pulse menu and program the pulse count, duty cycle, and pulse  
period.  
COUNT  
DCYCLE 33  
PER .0166  
2
Access the Voltage menu and press ô to access the immediate slew  
SLEW: 9.9+E37  
command. On the Entry keypad, enter a value that equals infinity.  
Access the Voltage menu and press ô until you access the triggered slew  
command. On the Entry keypad, enter a value such as 5 0 Enter, which sets  
the triggered slew rate to 50 volts/second.  
SLEW:T 50  
INIT:IMMED  
Then press Trigger Control and Enter, followed by Shift Trigger.  
When the voltage slew mode is set to LIST, the slew rates are set by the  
values in the voltage slew list. Refer to the List Transient example for more  
information on how to program lists. You must program the voltage values  
and dwell times as explained in that example. You must also program a slew  
rate for each point in the list (even if it is 9.9+E37).  
÷
NOTE:  
When specifying a dwell time, you must take the slew time into consideration. If the  
dwell time at any given list point is less than the slew time at the same point, the voltage  
will never reach its programmed level before the next list point becomes active.  
51  
4 - Front Panel Operation  
7 - Measuring Peak Inrush Current  
Peak inrush current is a non-repetitive measurement in the sense that peak inrush current occurs only  
when the unit under test is first turned on. In order to repeat the measurement, you must turn the unit off  
and wait for any input filter capacitors to discharge completely.  
This example shows you how you can measure the peak inrush current using the front panel meter. The  
voltage is set to 120 V rms and the output is triggered at an output phase of 75°, which optimizes the  
conditions under which inrush current is applied to the unit under test.  
Action  
Display  
1.  
2.  
VOLT  
0
Set the immediate voltage to 0. Press Voltage, then press 0 and Enter.  
Set the triggered voltage to 120 V rms. In the Voltage menu, press ô to  
access the triggered voltage command. Then press 1 2 0 Enter.  
VOLT:T 120  
3.  
4.  
Set the voltage mode to step. In the Voltage menu, press ô to access the  
mode command. Press ° to scroll to STEP and press Enter.  
VOLT:M STEP  
RANGE 150  
Make sure the unit is operating in the low voltage range. (The low voltage  
range has twice the output current rating of the high voltage range.) In the  
Voltage menu, press ô to access the range command. If necessary, press ° to  
set the range to 150 and press Enter.  
5.  
6.  
Make sure the triggered voltage slew rate is set to the fastest possible speed.  
In the Voltage menu, access the triggered slew command. If necessary, reset  
the slew rate to a faster speed.  
SLEW:T 9.9000+E37  
Make sure the peak current and rms current limits are set to high values. In the  
Current menu, access the rms current limit and then the peak current limit  
commands. If necessary, reset the rms current and the peak current limits to  
higher values.  
CURR:LEV 6.5  
CURR:PEAK 40  
(Agilent 6811B units have an rms current limit of 3.25 A. Agilent 6813B units  
have an rms current limit of 13 A and a peak current limit of 80 A)  
7.  
Synchronize the trigger source with a reference phase angle. In the Trigger  
Control menu, press ô to access the sync source command. Press ° to obtain  
PHASE and press Enter.  
SYNC:SOUR PHASE  
8.  
9.  
SYNC:PHAS 75  
INIT:IMMED  
0 A PK NR  
Set the reference phase angle to 75°. In the Trigger Control menu, press ô to  
access the sync phase command. Then press 7 5 Enter.  
Initiate (or enable) the unit for one immediate trigger from the front panel.  
Press Trigger Control and Enter.  
10. Set the meter function to measure nonrepetitive peak inrush current. In the  
Meter menu, press ô to access the peak inrush current display.  
11. Enable the output by pressing Output On/Off.  
0 V 60 HZ  
12.  
48 A PK NR  
Send the trigger to step the output from 0 V to 120 V. Press Shift Trigger.  
The inrush current is displayed on the Meter.  
On three-phase ac sources you can only return the peak inrush current from the selected phase because  
the front panel can only display one phase at a time. Refer to the ac source Programming Guide on how  
to return simultaneous measurements from all three phases.  
52  
Front Panel Operation - 4  
8 - Setting the GPIB Address and RS-232 Parameters  
Your ac source is shipped with the GPIB address set to 5 This address can only be changed from the front  
panel using the Address menu located under the Address key. This menu is also used to select the RS-  
232 interface and specify RS-232 parameters such baud rate and parity.  
Action  
Display  
To set the GPIB address, proceed as follows:  
1.  
2.  
ADDRESS 5  
ADDRESS 7  
On the System keypad, press Address.  
Enter the new address. For example, Press 7, Enter.  
To configure the RS-232 interface, proceed as follows:  
1.  
2.  
ADDRESS 5  
On the System keypad, press Address.  
Scroll through the Address menu by pressing ô . The interface command  
lets you select the RS-232 interface. The baudrate command lets you  
select the baudrate. The parity command lets you select the parity.  
INTF RS232  
BAUDRATE 600  
PARITY EVEN  
3.  
The ¯ and ° keys let you select the command parameters.  
9 - Saving and Recalling Operating States  
You can save up to 16 states (from location 0 to location 15) in non-volatile memory and recall them  
from the front panel. All programmable settings are saved. List data, however, cannot be saved in state  
storage. Only one list is saved in non-volatile memory.  
Action  
Display  
To save an operating state in location 1, proceed as follows:  
1.  
2.  
Set the instrument to the operating state that you want to save.  
*SAV 1  
*RCL 1  
Save this state to location 1. Press Shift Save 1 Enter.  
To recall a saved state in location 1, proceed as follows:  
1.  
To select the power-on state of the ac source, proceed as follows:  
Recall the state saved in location 1 by pressing Recall 1 Enter  
1.  
PON:STATE RST  
On the Function keypad, press Shift Output, and scroll through the Output  
menu until you get to the PON state command.  
2.  
Use the ¯ and ° keys to select either RST or RCL0. RST sets the power-on  
state of the unit as defined by the *RST command. RCL0 sets the power-on  
state of the unit to the state saved in *RCL location 0.  
To clear the non-volatile memory of the ac source, proceed as follows:  
1.  
*RST  
On the Function keypad, press Shift Output and scroll to the *RST  
command. Then press Enter. This returns the unit to the factory-default  
settings.  
2.  
3.  
*SAV 1  
Save these settings to location 1. Press Shift Save 1 Enter.  
Repeat step #2 for memory locations 2 through 16..  
*SAV 2  
*SAV 3  
*SAV 4  
.
.
...*SAV 16  
53  
4 - Front Panel Operation  
10 - Switching Between Single- and Three-phase Operation (Agilent 6834B only)  
When shipped from the factory, the Agilent 6834B ac source is configured for three-phase operation.  
You can configure the Agilent 6834B for single-phase operation. This increases the available output  
power for phase 1 from 1.5 kVA to 4.5 kVA.  
NOTE:  
When you configure the Agilent 6834B for single-phase operation, the phase 2 and phase  
3 output terminals are internally connected to the phase 1 output terminal. This  
distributes the increased available output power across the three output terminals.  
Additionally, switching the Agilent 6834B between single-phase and three-phase operation causes the  
following actions:  
it disables all outputs  
it reconfigures the current readback and programming calibration constants  
it returns all lists and *RCL states to their factory default states  
it reboots the unit, after which the newly selected number of phases becomes available  
NOTE:  
This may require you to reprogram the lists and recall states each time the outputs are  
switched.  
Action  
Display  
ADDRESS  
NOUTPUTS  
1.  
2.  
5
On the System keypad, press Address.  
Press ô to scroll through the address menu until you get to the NOUTPUTS  
3
command.  
3
Use the ¯ and ° keys to select the number of output phases; either 1 (single-phase)  
or 3 (three-phase).  
NOUTPUTS  
NOUTPUTS  
3
1
54  
A
Specifications  
Specifications  
o
Performance specifications are warranted over the ambient temperature range of 0 to 40 C. Unless  
otherwise noted, specifications are per phase for a sinewave with a resistive load at an output frequency  
range of 45 Hz to 5 kHz (45 Hz-1 kHz, Agilent 6843A) after a 30-minute warmup.  
Table A-1. Performance Specifications1  
Parameter  
Agilent 6814B  
Agilent 6834B  
Agilent 6843A  
1
Phases:  
1
3
1
Maximum Output Ratings  
rms Voltage2:  
150 V low range;  
300 V high range  
Power:  
3 kVA  
1.5 kVA/phase  
4.5 kVA  
4.8 kVA  
rms Current:  
20 A low range 10 A low range  
10 A high range 5 A high range  
80 A low range 40 A low range  
40 A high range 20 A high range  
30 A low range  
32 A low range  
15 A high range 16 A high range  
120 A low range 96 A low range  
60 A high range 48 A high range  
Repetitive peak Current:  
Crest Factor (current):  
Output Frequency Range:  
4
4
4
3
45 Hz5 kHz  
45 Hz1 kHz  
Constant Voltage Ripple and Noise  
60 dB (20 kHz10 MHz)  
0.5%  
Load Regulation:  
Line Regulation:  
0.1%  
Maximum Total Harmonic Distortion:  
1% (45 Hz1 kHz);  
1% + 1%/kHz (>1 kHz5 kHz)  
o
o
Programming Accuracy (@ 25 C ±5 C)  
rms Voltage:  
0.15% + 0.3 V (45100 Hz)  
0.5% + 0.3 V (>100500 Hz)  
1% + 0.3 V (>5005 kHz)  
0.01% + 10 µHz  
Frequency:  
Phase: (Agilent 6834B in 3-phase  
mode)  
N/A  
N/A  
N/A  
0.1º (45-100 Hz)  
1º (>1001 kHz)  
1º + 1%/kHz  
(>1k5 kHz)  
o
o
Measurement Accuracy (@25 C ±5 C)  
rms Voltage  
0.05% + 250 mV  
0.1% + 50 mA  
0.05%+ 250 mV (45 Hz 1 kHz)  
0.05% + 0.1%/kHz + 250 mV (>1 kHz 5 kHz)  
0.1% + 50 mA 0.1% + 25 mA 0.1% + 50 mA  
0.01% + 0.01Hz 0.01% + 0.01Hz  
rms Current  
Frequency:  
0.01% + 0.01Hz 0.01% + 0.01Hz  
Power (VA):  
Power (Watts):  
Power Factor:  
0.15% + 5 VA  
0.15% + 5 W  
0.01  
0.15% + 3 VA  
0.15% + 3 W  
0.01  
0.15% + 5 VA  
0.15% + 5 W  
0.01  
0.15% + 9 VA  
0.15% + 9 W  
0.01  
1Specifications subject to change without notice.  
2From line to neutral on Agilent 6834B  
55  
A - Specifications  
Supplemental Characteristics  
Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typical  
performance determined either by design or type testing.  
Table A-2. Supplemental Characteristics  
Parameter  
Agilent 6814B  
Agilent 6834B  
Agilent 6843A  
AC Input Voltage Range:  
180235 Vac (3-phase) or  
360440 Vac (3-phase)  
AC Input Frequency:  
4763 Hz  
300 Vrms  
24 A low range  
Output Isolation Voltage:  
Maximum Input Current (rms):  
18 A low range  
10 A high range  
5.8 kVA/4.1 kW  
0.2% + 80 mA  
24 A low range  
15 A high range  
8.9 kVA/5.9 kW  
0.2% + 80 mA  
15 A high range  
8.9 kVA/5.9 kW  
0.2%+40mA (3-phase)  
0.2%+80mA (1-phase)  
Maximum Input Power:  
Average Programming Accuracy:  
Average Programming Resolution  
rms Voltage:  
80 mV  
2 V  
5 mA  
80 mV  
2 V  
2.5 mA (3-phase)  
7.5 mA (1-phase)  
10 µHz  
80 mV  
2 V  
7.5 mA  
Overvoltage Programming (OVP):  
rms Current:  
Output Frequency:  
Phase (Agilent 6834B in 3-phase mode):  
10 µHz  
N/A  
10 µHz  
N/A  
0.001° (45Hz1kHz)  
Average Measurement Resolution  
rms Voltage:  
10 mV  
3 mA  
10 mV  
10 mV  
6 mA  
rmsCurrent:  
6 mA (3-phase)  
2 mA (1-phase)  
01.07533 x 106s  
04.30133 x 105s  
100 µs  
04.30133 x 105s  
100 µs  
List Dwell Time  
Triggering Accuracy with Respect to Phase  
Synchronization:  
250 µs  
Trigger In Response Time:  
200 µs  
400 µs  
500 µs  
50 µs  
200 µs  
Minimum Resolution for Dropout:  
Output Response Time:  
(output change from 10 to 90% or 90 to 10% of its  
total excursion with full resistive load)  
Remote Inhibit Response Time:  
<1 ms  
Remote Sense Capability:  
Waveform Table Resolution (voltage):  
Harmonic Measurement Time (amplitude):  
Up to 10 Vrms can be dropped across each load lead.  
1024 points  
1 harmonic 100 ms;  
all 50 harmonics 2 s  
RS-232 Interface Capabilities  
Baud Rates:  
300, 600, 1200, 2400, 4800, 9600  
7 bits even or odd parity; 8 bits without parity  
SCPI (Standard Commands for Programmable Instruments),  
Elgar 9012 PIP  
Data Format:  
Language:  
Trig In/Trig Out Characteristics  
Trig Out (HC TTL output):  
V
= 0.8 max. @ 1.25 mA  
= 3.3 V max. @ 1.25 mA  
ol  
V
oh  
Trig In (10k pullup):  
V = 0.8 V max.  
il  
ih  
V
= 2 V max.  
56  
Specifications A  
Table A-2. Supplemental Characteristics (continued)  
Parameter  
Agilent 6814B  
Agilent 6834B  
Agilent 6843A  
INH/FLT Characteristics  
Maximum Ratings:  
INH Terminals:  
FLT Terminals:  
16.5 Vdc between INH terminals; FLT terminals; and from INH  
terminals to chassis ground  
I
= 1.25 mA max.  
= 0.5 Vmax.  
ol  
V
ol  
V = 0.8 V max.  
il  
ih  
V
= 2 V min.  
tw = 100 µs min.  
td = 4 ms typical  
Saveable Data (nonvolatile)  
Instrument States:  
User-defined waveforms:  
List Data:  
16 (0 to 15)  
12 (with 1024 data points in each)  
1 to 100 points (for each list function)  
GPIB Interface Capabilities  
Language:  
SCPI, Elgar 9012 PIP  
Interface:  
AH1, C0, DC1, DT1, E2, LE1, PP0, RL1, SH1, SR1, TE6  
Programming Time:  
Recommended Calibration Interval:  
Regulatory Compliance  
Listed to:  
10 ms  
1 year  
UL 3111-1  
CSA 22.2 No. 1010-1  
IEC 1010  
Certified to:  
Conforms to:  
RFI Suppression  
Complies with:  
CISPR-11, Group 1, Class A  
Dimensions  
Height (add 12.7 mm or 0.5 in. for feet)  
Width:  
Depth:  
262.6 mm (10.3 in.)  
430.8 mm (16.96 in.)  
602 mm (23.7 in.)  
Net Weight:  
Shipping Weight:  
79.5 kg (175 lb)  
119.1 kg (626 lb)  
87.7 kg (193 lb)  
127.3 kg (280 lb)  
87.7 kg (193 lb)  
127.3 kg (280 lb)  
57  
B
Verification and Calibration  
Introduction  
This appendix includes verification and calibration procedures for the Agilent 6814B/6834B/6843A AC  
Power Solutions. Instructions are given for performing the procedures either from the front panel or from  
a controller over the GPIB.  
The verification procedures do not check all the operating parameters, but verify that the ac source is  
performing properly. Performance Tests, which check all the specifications of the ac source, are given in  
the applicable ac source Service Manual.  
Because the output of the ac source must be enabled during verification or calibration, proceed with  
caution, since voltages and currents will be active at the output terminals.  
Important  
Perform the verification procedures before calibrating your ac source. If the ac source  
passes the verification procedures, the unit is operating within its calibration limits and  
does not need to be recalibrated.  
WARNING LETHAL VOLTAGES. Ac sources can supply 424 V peak at their output. DEATH  
on contact may result if the output terminals or circuits connected to the output are  
touched when power is applied. These procedures must be performed by a qualified  
electronics technician or engineer trained on this equipment.  
Equipment Required  
The equipment listed in the following table, or the equivalent to this equipment, is required for  
verification and calibration.  
Table B-1. Equipment Required  
Equipment  
Digital Voltmeter  
Characteristics  
Resolution: 10 nV @ 1 V  
Recommended Model  
Agilent 3458A  
Readout: 8.5 digits  
Accuracy: >20 ppm  
Current Monitor1  
Guildline 7320/0.01  
Norma Gerts Instruments  
0.01 , ±200 ppm, (Agilent 6814B/6834B)  
0.001 , ±200 ppm, (Agilent 6843A)  
30:1 ratio, 50 ppm, 45 Hz to 1 kHz  
2 15 , > 1.5 kW (Agilent 6814B/6834B)  
1 5 , > 4.8 kW non-inductive (Agilent 6843A)  
1 , 100 Watts min. (Agilent 6843A only)  
Full GPIB capabilities  
Ratio Transformer2  
Load Resistors  
Impedance Resistor  
GPIB Controller  
HP Series 200/300 or equivalent  
1The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drops in the  
load leads and connections. Connect the voltmeter directly to these current-monitoring terminals.  
2A ratio transformer is required only when verifying output voltage readback to MIL-STD-45662A 4:1 test  
equipment ratio requirements.  
59  
B - Verification and Calibration  
Test Setup  
Figure B-1 shows the setup for the tests. Be certain to use load leads of sufficient wire gauge to carry the  
full output current (see Chapter 2).  
B. CURRENT SETUP  
A. VOLTAGE SETUP  
RMS  
VOLTMETER  
1
30  
RMS  
VOLTMETER  
S1  
S2  
LOAD  
R
COM  
O2  
O1  
3
O
shunt  
shunt  
O1  
O2  
LOAD  
R
R
IMPEDANCE  
O3  
COM  
L1  
R LOAD  
Switch is for  
convenience,  
not required.  
AC INPUT 3 phase  
CAUTION: Connect only one phase at a time  
o line  
180-254 VAC line t  
or  
ne  
360-440 VAC line to li  
Figure B-1. Verification & Calibration Test Setup  
Performing the Verification Tests  
The following procedures assume you understand how to operate the ac source from the front panel as  
explained in Chapter 4.  
When performing the verification tests from a GPIB controller, you may have to consider the relatively  
slow settling times and slew rates of the ac source as compared to computer and system voltmeters. Insert  
suitable WAIT statements into the test program to give the ac source time to respond to test commands.  
Perform the following tests for operation verification in the order indicated.  
1.  
2.  
3.  
Turn-On Checkout  
Voltage Programming and Measurement Accuracy  
Current Measurement Accuracy  
Turn-On Checkout Procedure  
Perform the Turn-On Checkout as directed in Chapter 3.  
NOTE:  
The ac source must pass turn-on selftest before you can proceed with the verification  
tests.  
60  
Verification and Calibration - B  
Voltage Programming and Measurement Accuracy  
This test verifies the voltage programming, GPIB measurement, and front panel meter functions. Values  
read back over the GPIB should be the same as those displayed on the front panel.  
Figure B-1 shows the setup. Measure the ac output voltage directly at the output terminals. If you are  
verifying a three-phase source, sart by verifying output phase 1.  
Action  
Normal Result  
1.  
2.  
3.  
Make sure the ac source is turned off. Connect the DVM and ratio  
transformer as shown in the test setup in Figure B-1.  
Turn on the ac source with no load. In the Output menu, execute the  
*RST command to reset the unit to its factory default state.  
*RST  
Program the output voltage to 150 volts and set the output current  
limit to its maximum value.  
CV annunciator on.  
Output voltage near 0.  
Output current near 0.  
4.  
5.  
Enable the output by pressing Output On/Off.  
Record voltage readings at the DVM1 and on the front panel display.  
Output voltage near 150 V.  
Readings within low voltage  
limits specified in table B-2.  
6.  
7.  
Program the output voltage to 300 volts.  
Record voltage readings at the DVM1 and on the front panel display.  
Output voltage near 300 V.  
Readings within high voltage  
limits specified in table B-2.  
8.  
If you are verifying a 3-phase source, repeat steps 1 through 7 for  
phases 2 and 3. Press Phase Select to select the next phase.  
Readings within specified High  
range limits (300 V/1 kHz).  
1Multiply the DVM reading by the transformer ratio if a ratio transformer is used.  
RMS Current Readback Accuracy  
This test verifies the current readback. Use the appropriate current shunt with the accuracy specified in  
table B-1. Use wire of sufficient size to carry the maximum rated current of the ac source (see table 2-1).  
If you are verifying a 3-phase source, start by verifying phase 1.  
Action  
Normal Result  
1.  
Turn off the ac source. Connect the load resistor, current shunt, and  
the DVM across the current shunt as shown in Figure B-1. Use the  
following load resistor values:  
Agilent 6814B = 7.5; Agilent 6834B = 15; Agilent 6843A = 5Ω  
2.  
3.  
Turn on the ac source. In the Output menu, execute the *RST  
command to reset the unit to its factory default state.  
*RST  
Program the output voltage to 100 volts and set the current limit as  
follows:  
Agilent 6814B = 10 A; Agilent 6834B = 5A; Agilent 6843A = 15A  
Then enable the output by pressing Output On/Off.  
CC annunciator on. Output current  
near 10 A for Agilent 6814B  
near 5 A for Agilent 6834B  
near 15A for Agilent 6843A  
4.  
5.  
Record the DVM voltage reading and calculate the rms current.  
Divide the DVM reading by the current monitor resistor value.  
Record the front panel reading.  
Difference between the measured  
output current and front panel  
readings are within specified limits.  
If you are verifying a 3-phase source, repeat steps 1 through 4 for  
phases 2 and 3. Press Phase Select to select the next phase.  
61  
B - Verification and Calibration  
Table B-2. Agilent 6814B/6834B/6843A Verification Test Record  
Model ________________  
Test Description  
Report No.____________Date_____________  
Minimum  
Recorded Results  
Maximum  
Specification  
Specification  
Voltage Programming and Measurement Accuracy  
Low voltage (150 Vrms)  
Front Panel Measurement  
149.5 V  
Vout 300 mV  
_______V  
_______mV  
150.5 V  
Vout +300 mV  
High voltage (300 Vrms)  
Front Panel Measurement  
_______V  
_______mV  
300.7 V  
Vout +400 mV  
299.30 V  
Vout 400 mV  
Agilent 6814B Current Measurement Accuracy  
Front Panel Measurement (10A)  
Front Panel Measurement (5A)  
Front Panel Measurement (15A)  
_______mA  
Iout +60 mA  
Iout +30 mA  
Iout +65 mA  
Iout 60 mA  
Agilent 6834B Current Measurement Accuracy  
_______mA  
Iout 30 mA  
Agilent 6843A Current Measurement Accuracy  
_______mA  
Iout 65 mA  
Performing the Calibration Procedure  
Table B-1 lists the equipment required for calibration. Figure B-1 shows the test setup.  
NOTE:  
You do not have to do a complete calibration each time. You may calibrate only the  
voltage or current and proceed to "Saving the Calibration Constants." However, before  
you calibrate OVP, you must first calibrate the output voltage.  
The following parameters may be calibrated:  
ac output voltage  
realtime voltage (Agilent 6843A only)  
overvoltage protection (OVP)  
output voltage readback  
ac output current  
output current measurement (Agilent 6843A only)  
output impedance (Agilent 6843A only)  
Before calibrating the output impedance on Agilent 6843A units, you must first calibrate the output  
voltage and the output current.  
NOTE:  
The Agilent 6834A ac source must be calibrated in 3-phase output mode or an error will  
occur. To put the Agilent 6834B unit in 3-phase output mode, press Address, scroll to  
NOUTPUT 3 command, and press Enter.  
62  
Verification and Calibration - B  
Front Panel Calibration Menu  
The Entry keypad is used for calibration functions.  
Press this key to access the calibration menu.  
Shift  
Cal  
Display  
CAL ON <value>  
Command Function  
Turns calibration mode on when the correct password  
value is entered.  
CAL OFF  
Turns calibration mode off  
CAL:LEV <char>  
CAL:DATA <value>  
CAL:VOLT:AC  
CAL:VOLT:PROT  
CAL:CURR:AC  
CAL:CURR:MEAS  
CAL:IMP  
Advance to next step in sequence (P1, P2, P3, or P4).  
Input a calibration measurement.  
Begin ac voltage calibration sequence  
Begin voltage protection calibration  
Begin ac current calibration sequence  
Begin current measurement calibration sequence  
Begin output impedance calibration sequence  
Begin realtime voltage calibration  
CAL:VOLT:RTIM1  
CAL:SAVE  
Saves the calibration constants in non-volatile memory.  
Set new calibration password.  
CAL:PASS <value>  
Notes:  
1 Agilent 6843A only  
value = a numeric value  
char = a character string parameter  
Use  
Use  
and  
and  
to scroll through the command list.  
to scroll through the parameter list.  
Front Panel Calibration  
WARNING LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH  
on contact may result if the output terminals or circuits connected to the output are  
touched when power is applied. These procedures must be performed by a qualified  
electronics technician or engineer trained on this equipment.  
The following procedures assume you understand how to operate front panel keys (see Chapter 4).  
Enable Calibration Mode  
Action  
Display  
1.  
*RST  
Reset the unit by selecting Shift, Output, and pressing Enter.  
If you are calibration a 3-phase source, make sure that the default phase 1  
(φ1) annunciator is lit. Press Phase Select to select a different phase.  
2.  
3.  
CAL ON 0.0  
Press Shift Calibration, scroll to CAL ON, and press Enter.  
Enter the calibration password from Entry keypad and press Enter. If the  
password is correct the Cal annunciator will come on.  
CAL DENIED  
If CAL DENIED appears, then an internal switch has been set to prevent the  
calibration from being changed. (see the Service Manual.)  
OUT OF RANGE  
If the password is incorrect, an error occurs. If the active password is lost,  
the calibration function can be recovered by setting an internal switch that  
defeats password protection. (see the Service Manual.)  
63  
B - Verification and Calibration  
Calibrating and Entering Voltage Calibration Values  
Action  
Display  
4.  
Connect the DVM (ac volts mode) directly to the ac source via the ratio  
transformer shown in Figure B-1. Do not connect the load resistor or  
current shunt.  
5.  
6.  
CAL:VOLT:AC  
CAL:LEV P1  
Press Shift Calibration, scroll to CAL VOLT AC, and press Enter.  
Press Shift Calibration, scroll to CAL LEV P1, and press Enter to select  
the first calibration point.  
7.  
CAL:DATA 0.00  
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad  
to enter the voltage value displayed on the DVM. (Multiply the DVM  
readings by the transformer ratio if a ratio transformer is used.)  
8.  
9.  
CAL:LEV P2  
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P2  
parameter, and press Enter. This selects the second calibration point.  
CAL:DATA 0.00  
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad  
to enter the voltage value displayed on the DVM. (Multiply the DVM  
readings by the transformer ratio if a ratio transformer is used.)  
10.  
11.  
CAL:LEV P3  
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P3  
parameter, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad  
to enter the voltage value displayed on the DVM. (Multiply the DVM  
readings by the transformer ratio if a ratio transformer is used.)  
12.  
13.  
CAL:LEV P4  
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P4  
parameter, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad  
to enter the voltage value displayed on the DVM. (Multiply the DVM  
readings by the transformer ratio if a ratio transformer is used.)  
The ac source is now holding the new voltage calibration constants in RAM  
Calibrating and entering realtime voltage calibration values (Agilent 6843A  
only)  
14.  
15.  
16.  
CAL:VOLT:RTIM  
CAL:LEV P1  
Press Shift Calibration, scroll to CAL VOLT RTIM, and press Enter.  
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad  
to enter the voltage value displayed on the DVM. (Multiply the DVM  
readings by the transformer ratio if a ratio transformer is used.)  
Calibrating the OVP trip point  
17.  
18.  
CAL:VOLT:PROT  
Press Shift Calibration, scroll to CAL VOLT PROT, and press Enter.  
Wait for the ac source to compute the OVP calibration constant. The  
display returns to Meter mode when the OVP calculation is complete.  
The ac source is now holding the new OVP calibration constants in RAM  
19.  
If you are calibrating a 3-phase source, press Phase Select to select the  
next phase and repeat steps 4 through 13 and 17 and 18 for phases 2 and 3.  
The phase annunciators on the front panel indicate which phase is active.  
64  
Verification and Calibration - B  
Calibrating and Entering Current Calibration Values  
Action  
Display  
20.  
Connect the appropriate current shunt and load resistor as shown in figure B-  
1. Connect the DVM (ac rms mode) across the current shunt.  
If you are calibrating a 3-phase source, make sure that the default phase 1  
(φ1) annunciator is lit. Press Phase Select to select a different phase.  
21.  
22.  
23.  
CAL:CURR:AC  
CAL:LEV P1  
Press Shift Calibration, scroll to CAL CURR AC, and press Enter.  
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM  
reading to stabilize. Read the DVM and calculate the first current value  
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad  
to enter the rms current value.  
24.  
25.  
CAL:LEV P2  
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P2  
parameter, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM  
reading to stabilize. Read the DVM and calculate the second current value  
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad  
to enter the rms current value.  
26.  
If you are calibrating a 3-phase source, press Phase Select to select the  
next phase and repeat steps 20 through 25 for phases 2 and 3.  
The phase annunciators on the front panel indicate which phase is active.  
Calibrating and entering rms current measurement values (Agilent 6843A only)  
27.  
28.  
29.  
CAL:CURR:MEAS  
CAL:LEV P1  
Press Shift Calibration, scroll to CAL CURR MEAS, and press Enter.  
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM  
reading to stabilize. Read the DVM and calculate the first current value  
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad  
to enter the rms current value.  
30.  
31.  
CAL:LEV P2  
Press Shift Calibration, scroll to CAL LEV P1 command, use ° to scroll  
to the P2 parameter, and press Enter.  
CAL:DATA 0.00  
Press Shift Calibration and scroll to the CAL DATA. Wait for the DVM  
reading to stabilize. Read the DVM and calculate the second current value  
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad  
to enter the rms current value.  
The ac source is now holding the new current calibration constants in RAM  
65  
B - Verification and Calibration  
Calibrating the Output Impedance (Agilent 6843A only)  
NOTE:  
The output voltage and output current must be calibrated before the output impedance  
can be calibrated.  
Action  
Display  
32.  
Connect only the output impedance resistor across the output of the ac source.  
Do not connect any other equipment.  
33.  
34.  
CAL:IMP  
Press Shift Calibration, scroll to the CAL IMP command, and press Enter.  
Wait for the ac source to compute the output impedance calibration constant.  
The display returns to Meter mode when the calculation is complete.  
The ac source is now holding the new impedance calibration constants in RAM  
Saving the Calibration Constants  
CAUTION:  
Storing calibration constants overwrites the existing ones in non-volatile memory. If you  
are not sure you want to permanently store the new constants, omit this step. The ac  
source calibration will then remain unchanged.  
Action  
Display  
35.  
36.  
CAL:SAVE  
CAL OFF  
Press Shift Calibration, scroll to CAL SAVE, and press Enter.  
Press Shift Calibration, select CAL OFF, and press Enter to exit Calibration  
mode. *RST and *RCL will also set the calibration state to OFF.  
Changing the Calibration Password  
The factory default password is 0. You can change the password when the ac source is in calibration  
mode (which requires you to enter the existing password). Proceed as follows:  
Action  
Display  
1.  
2.  
3.  
4.  
CAL ON 0.0  
Begin by pressing Shift Calibration and scrolling to the CAL ON command.  
Enter the existing password from Entry keypad and press Enter  
Press Shift Calibration and scroll to the CAL PASS command.  
CAL:PASS 0  
Enter the new password from the keypad. You can use any number with up to  
six digits and an optional decimal point. If you want the calibration function to  
operate without requiring any password, change the password to 0 (zero).  
NOTE:  
If you want the calibration function to operate without requiring any password, change  
the password to 0 (zero).  
66  
Verification and Calibration - B  
Calibration Error Messages  
Errors that can occur during calibration are shown in the following table.  
Table B-3. GPIB Calibration Error Messages  
Meaning  
Error  
401  
402  
403  
404  
405  
406  
CAL switch prevents calibration (This is a hardware disable, see the ac source Service Manual.)  
CAL password is incorrect  
CAL not enabled  
Computed readback cal constants are incorrect  
Computed programming cal constants are incorrect  
Incorrect sequence of calibration commands  
Calibration Over the GPIB  
You can calibrate the ac source by using SCPI commands within your controller programming  
statements. Be sure you are familiar with calibration from the front panel before you calibrate from a  
controller. Each front panel calibration command has a corresponding SCPI command.  
The SCPI calibration commands are explained in Chapter 3 of the ac source Programming Guide.  
Calibration error messages that can occur during GPIB calibration are shown in table B-3.  
Agilent Calibration Program Listing  
Figure B-2 lists the calibration program. This program can be run on any controller operating under  
Agilent BASIC. The assumed power supply address is 705 and calibration password is 0. If required,  
change these parameters in the appropriate statements.  
67  
B - Verification and Calibration  
10  
!
20  
! AC Source calibration program  
Rev B.00.00  
30  
!
40  
ASSIGN @Ac TO 705  
!
50  
60  
PRINT TABXY(3,3),"This program will calibrate the 6814B/34B/43A AC Power Solutions."  
PRINT TABXY(3,5),"Equipment requirements are: Agilent3458A or equivalent DVM"  
PRINT TABXY(35,6),"0.01 ohm <200ppm Current Shunt for 6814B/6834B"  
PRINT TABXY(35,7),"0.001 ohm <200ppm Current Shunt for 6843A"  
PRINT TABXY(35,8),"0 - 5 ohm > 4.8 kW power resistor for 6843A"  
70  
80  
90  
100  
110  
120  
130  
140  
150  
160  
170  
180  
190  
200  
210  
220  
230  
240  
250  
260  
270  
280  
290  
300  
310  
320  
330  
340  
350  
360  
370  
380  
390  
400  
410  
420  
430  
440  
450  
460  
470  
480  
490  
500  
510  
520  
530  
540  
550  
560  
570  
580  
590  
600  
610  
620  
630  
640  
650  
660  
670  
680  
690  
PRINT TABXY(35,9),"2 - 15 ohm > 1.5 kW power resistor for 6814B/6834B"  
PRINT TABXY(35,10),"1 - 1 ohm > 100 watt impedance resistor for 6843A"  
PRINT TABXY(35,11),"30:1 <50ppm Ratio Transformer"  
PRINT TABXY(3,13),"Ratio Transformer is required when calibrating to MIL-STD-45662A. If the ratio"  
PRINT TABXY(3,14),"transformer is not used, the measurement uncertainty must be recalculated."  
PRINT TABXY(3,16),"IF YOU ARE CALIBRATING A 6843B, SELECT THE PHASE TO CALIBRATE USING THE FRONT"  
PRINT TABXY(3,17),"PANEL KEYPAD.  
*** NOTE: THIS PROGRAM WILL ONLY CALIBRATE 1 PHASE. ***"  
PRINT TABXY(3,18),"YOU MUST RUN THIS PROGRAM 3 TIMES TO CALIBRATE ALL PHASES OF A 6843B."  
DISP "Press CONT to continue"  
PAUSE  
CLEAR SCREEN  
PRINT TABXY(10,5),"1. Turn the AC Source off"  
PRINT TABXY(10,7),"2. Disconnect all loads"  
PRINT TABXY(10,9),"3. Connect the 3458A to the rear terminal block"  
PRINT TABXY(10,11),"4. Set the 3458A to AC VOLTS"  
PRINT TABXY(10,13),"5. Turn on the AC Source"  
!
DISP "Press CONT to begin AC PROGRAMMING and MEASUREMENT calibration"  
PAUSE  
CLEAR SCREEN  
PRINT TABXY(18,5),"CALIBRATING AC POGRAMMING and MEASUREMENT"  
PRINT TABXY(20,7),"There are 4 points to be calibrated"  
OUTPUT @Ac;"CAL:STATE:ON"  
OUTPUT @Ac;"CAL:VOLT:AC"  
OUTPUT @Ac;"CAL:LEV P1"  
WAIT 10  
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p1  
PRINT TABXY(25,9),"Point 1 entered"  
OUTPUT @Ac;"CAL:DATA";Ac_p1  
OUTPUT @Ac;"CAL:LEV P2"  
WAIT 10  
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p2  
PRINT TABXY(25,11),"Point 2 entered"  
OUTPUT @Ac;"CAL:DATA";Ac_p2  
OUTPUT @Ac;"CAL:LEV P3"  
WAIT 10  
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p3  
PRINT TABXY(25,13),"Point 3 entered"  
OUTPUT @Ac;"CAL:DATA";Ac_p3  
OUTPUT @Ac;"CAL:LEV P4"  
WAIT 10  
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p4  
PRINT TABXY(25,15),"Point 4 entered"  
OUTPUT @Ac;"CAL:DATA";Ac_p4  
WAIT 3  
CLEAR SCREEN  
!
! Only include lines 580 - 690 if calibrating Agilent 6843  
!
PRINT TABXY(18,5),"CALIBRATING REALTIME VOLTAGE (Agilent 6834A ONLY)"  
PRINT TABXY(20,7),"There is 1 point to be calibrated"  
OUTPUT @Ac;"CAL:VOLT:RTIM"  
OUTPUT @Ac;"CAL:LEV P1"  
WAIT 10  
INPUT "Enter realtime rms ( transformer ratio * DVM reading)",Rt_p1  
PRINT TABXY(25,9),"Point 1 entered"  
OUTPUT @Ac;"CAL:DATA";Rt_p1  
WAIT 3  
CLEAR SCREEN  
Figure B-2. Calibration Program Listing (Sheet 1 of 2)  
68  
Verification and Calibration - B  
700  
710  
720  
730  
740  
750  
760  
770  
780  
790  
800  
810  
820  
830  
840  
850  
860  
870  
880  
890  
900  
910  
920  
930  
940  
950  
960  
970  
980  
990  
PRINT TABXY(15,10),"CALIBRATING OVERVOLTAGE PROTECTION"  
OUTPUT @Ac;"CAL:VOLT:PROT"  
PRINT TABXY(30,15),"WAIT"  
WAIT 30  
OUTPUT @Ac;"CAL:SAVE"  
OUTPUT @Ac;"CAL:STATE OFF"  
CLEAR SCREEN  
PRINT TABXY(15,5),"1. Turn off the AC Source"  
PRINT TABXY(15,7),"2. Connect the current shunt and load resistor, see fig.B-1"  
PRINT TABXY(15,9),"3. Connect the 3458A across the current shunt"  
PRINT TABXY(15,11),"4. Set the 3458A to AC rms VOLTS"  
PRINT TABXY(15,13),"5. Turn on the AC Source"  
!
DISP "Press CONT to begin Current Program and Measurement calibration"  
PAUSE  
CLEAR SCREEN  
PRINT TABXY(22,5),"CALIBRATING CURRENT POGRAMMING"  
PRINT TABXY(20,7),"There are 2 points to be calibrated"  
OUTPUT @Ac;"CAL:STATE ON"  
OUTPUT @Ac;"CAL:CURR:AC"  
OUTPUT @Ac;"CAL:LEV P1"  
WAIT 10  
INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p1  
PRINT TABXY(25,9),"Point 1 entered"  
OUTPUT @Ac;"CAL:DATA";Ai_p1  
OUTPUT @Ac;"CAL:LEV P2"  
WAIT 10  
INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p2  
PRINT TABXY(25,11),"Point 2 entered"  
OUTPUT @Ac;"CAL:DATA";Ai_p2  
1000 WAIT 3  
1010 CLEAR SCREEN  
1020 !  
1030 ! Only include lines 1030 - 1340 if calibrating Agilent 6843  
1040 !  
1050 PRINT TABXY(22,5),"CALIBRATING CURRENT MEASUREMENT (Agilent 6843A ONLY)"  
1060 PRINT TABXY(20,7),"There are 2 points to be calibrated"  
1070 OUTPUT @Ac;"CAL:CURR:MEAS"  
1080 OUTPUT @Ac;"CAL:LEV P1"  
1090 WAIT 10  
1100 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p1  
1110 PRINT TABXY(25,9),"Point 1 entered"  
1120 OUTPUT @Ac;"CAL:DATA";Am_p1  
1130 OUTPUT @Ac;"CAL:LEV P2"  
1140 WAIT 10  
1150 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p2  
1160 PRINT TABXY(25,11),"Point 2 entered"  
1170 OUTPUT @Ac;"CAL:DATA";Am_p2  
1180 WAIT 3  
1190 CLEAR SCREEN  
1200 OUTPUT @Ac;"CAL:SAVE"  
1210 OUTPUT @Ac;"CAL:STATE OFF"  
1220 PRINT TABXY(15,5),"1. Turn off the AC Source"  
1230 PRINT TABXY(15,7),"2. Disconnect all equipment from the AC Source"  
1240 PRINT TABXY(15,9),"3. Connect the 1 ohm impedance resistor, see fig.B-1"  
1250 PRINT TABXY(15,11),"4. Turn on the AC Source"  
1260 !  
1270 DISP "Press CONT to begin Output Impedance calibration"  
1280 PAUSE  
1290 PRINT TABXY(15,10),"CALIBRATING OUTPUT IMPEDANCE (Agilent 6843A ONLY)"  
1300 OUTPUT @Ac;"CAL:STATE ON"  
1310 OUTPUT @Ac;"CAL:IMP"  
1320 PRINT TABXY(30,15),"WAIT"  
1330 WAIT 30  
1340 !  
1350 OUTPUT @Ac;"CAL:SAVE"  
1360 OUTPUT @Ac;"CAL:STATE OFF"  
1370 CLEAR SCREEN  
1380 PRINT TABXY(25,10),"CALIBRATION COMPLETE"  
1390 END  
Figure B-2. Calibration Program Listing (Sheet 2 of 2)  
69  
C
Error Messages  
Error Number List  
This appendix gives the error numbers and descriptions that are returned by the ac source. Error numbers  
are returned in two ways:  
Error numbers are displayed on the front panel  
Error numbers and messages are read back with the SYSTem:ERRor? query. SYSTem:ERRor?  
returns the error number into a variable and returns two parameters: an NR1 and a string.  
The following table lists the errors that are associated with SCPI syntax errors and interface problems. It  
also lists the device dependent errors. Information inside the brackets is not part of the standard error  
message, but is included for clarification. When errors occur, the Standard Event Status register records  
them in bit 2, 3, 4, or 5:  
Table C-1. Error Numbers  
Error Number Error String [Description/Explanation/Examples]  
Command Errors 100 through 199 (sets Standard Event Status Register bit #5)  
–100 Command error [generic]  
–101 Invalid character  
–102 Syntax error [unrecognized command or data type]  
–103 Invalid separator  
–104 Data type error [e.g., "numeric or string expected, got block data"]  
–105 GET not allowed  
–108 Parameter not allowed [too many parameters]  
–109 Missing parameter [too few parameters]  
–112 Program mnemonic too long [maximum 12 characters]  
–113 Undefined header [operation not allowed for this device]  
–121 Invalid character in number [includes "9" in octal data, etc.]  
–123 Numeric overflow [exponent too large; exponent magnitude >32 k]  
–124 Too many digits [number too long; more than 255 digits received]  
–128 Numeric data not allowed  
–131 Invalid suffix [unrecognized units, or units not appropriate]  
–138 Suffix not allowed  
–141 Invalid character data [bad character, or unrecognized]  
–144 Character data too long  
–148 Character data not allowed  
–150 String data error  
–151 Invalid string data [e.g., END received before close quote]  
–158 String data not allowed  
–160 Block data error  
–161 Invalid block data [e.g., END received before length satisfied]  
–168 Block data not allowed  
–170 Expression error  
71  
C - Error Messages  
–171 Invalid expression  
–178 Expression data not allowed  
Execution Errors –200 through –299 (sets Standard Event Status Register bit #4)  
–200 Execution error [generic]  
–221 Settings conflict [check current device state]  
–222 Data out of range [e.g., too large for this device]  
–223 Too much data [out of memory; block, string, or expression too long]  
–224 Illegal parameter value [device-specific]  
–225 Out of memory  
–270 Macro error  
–272 Macro execution error  
–273 Illegal macro label  
–276 Macro recursion error  
–277 Macro redefinition not allowed  
System Errors –300 through –399 (sets Standard Event Status Register bit #3)  
–310 System error [generic]  
–350 Too many errors [errors beyond 9 lost due to queue overflow]  
Query Errors –400 through –499 (sets Standard Event Status Register bit #2)  
–400 Query error [generic]  
–410 Query INTERRUPTED [query followed by DAB or GET before response complete]  
–420 Query UNTERMINATED [addressed to talk, incomplete programming message received]  
–430 Query DEADLOCKED [too many queries in command string]  
–440 Query UNTERMINATED [after indefinite response]  
Selftest Errors 0 through 99 (sets Standard Event Status Register bit #3)  
0
1
2
3
4
5
6
7
No error  
Non-volatile RAM RD0 section checksum failed  
Non-volatile RAM CONFIG section checksum failed  
Non-volatile RAM CAL section checksum failed  
Non-volatile RAM WAVEFORM section checksum failed  
Non-volatile RAM STATE section checksum failed  
Non-volatile RAM LIST section checksum failed  
Non-volatile RAM RST section checksum failed  
10 RAM selftest  
11 - 31 DAC selftest error, expected <n>, read <reading>  
Errors 11, 12, 13, 14, 15 apply to DAC12 1A and 1B  
Errors 16, 17, 18 apply to DAC12 2A  
Errors 19, 20, 21 apply to DAC12 2B  
Errors 22, 23 apply to DAC12 4A  
Errors 24, 25 apply to DAC12 4B  
Errors 26, 27, 28 apply to DAC12 3A and 3B  
Errors 29, 30, 31 apply to DAC12 5A and 5B  
40 Voltage selftest error, output 1  
72  
Error Messages - C  
41 Voltage selftest error, output 2  
42 Voltage selftest error, output 3  
43 Current selftest error, output 1  
44 Current selftest error, output 2  
45 Current selftest error, output 3  
70 Fan voltage failure  
80 Digital I/O selftest error  
Device-Dependent Errors 100 through 32767 (sets Standard Event Status Register bit #3)  
200 Outgrd not responding  
201 Front panel not responding  
210 Ingrd receiver framing error  
211 Ingrd uart overrun status  
212 Ingrd received bad token  
213 Ingrd receiver buffer overrun  
214 Ingrd input buffer overrun  
215 Outgrd output buffer overrun  
216 RS-232 receiver framing error  
217 RS-232 receiver parity error  
218 RS-232 receiver overrun error  
219 Ingrd inbuf count sync error  
220 Front panel uart overrun  
221 Front panel uart framing  
222 Front panel uart parity  
223 Front panel buffer overrun  
224 Front panel timeout  
401 CAL switch prevents calibration  
402 CAL password is incorrect  
403 CAL not enabled  
404 Computed readback cal constants are incorrect  
405 Computed programming cal constants are incorrect  
406 Incorrect sequence of calibration commands  
600 Systems in mode:list have different list lengths  
601 Requested voltage and waveform exceeds peak voltage capability  
602 Requested voltage and waveform exceeds transformer volt-second rating  
603 Command only applies to RS-232 interface  
604 Trigger received before requested number of pre-trigger readings  
605 Requested RMS current too high for voltage range  
606 Waveform data not defined  
607 VOLT, VOLT:SLEW, and FUNC:SHAP modes incompatible  
608 Measurement overrange  
609 Output buffer overrun  
610 Command cannot be given with present SYST:CONF setting  
73  
Index  
—A—  
accessories, 10  
airflow, 16  
annunciators  
φ1, 32  
error numbers, 71  
—F—  
Addr, 32  
Cal, 32  
CC, 32  
CV, 32  
Dis, 32  
Err, 32  
OCP, 32  
Prot, 32  
features, 11  
Fixed, 44  
FLT connections, 21  
frequency control, 12  
front panel, 31  
annuncuiators, 32  
controls and indicators, 12, 31  
keys, 32  
function keys, 34  
Rmt, 32  
Shift, 32  
SRQ, 32  
Tran, 32  
Unr, 32  
, 34, 35  
Index, 34  
immediate action, 34  
Output On/Off, 34  
Phase Select, 34  
Trigger, 34  
AWG ratings, 19  
fuses, 17  
—C—  
cables, 10  
calibration, 62  
enable, 63  
—G—  
general information, 9  
ground, earth, 10  
equipment, 59  
error messages, 67  
menu, 63  
output impedance, 66  
password, 66  
program listing, 67  
rms current, 65  
saving, 66  
guide, programming, 9  
guide, user’s, 9  
—H—  
hazardous voltages, 59  
history, 6  
setup, 60  
HP-IB, 53  
voltage offset, 64  
capabilities, 11  
cleaning, 15  
address, 53  
connections, 22  
—I—  
—D—  
INH connections, 21  
input  
damage, 15  
digital connections, 21  
digital connector, 15  
dimensions, 16  
connections, 17  
power, 10  
inspection, 15  
—E—  
—L—  
entry keys, 40  
, 40  
lethal voltages, 59  
line fuse  
replacing, 29  
List, 44, 46  
load voltage drops, 19  
location, 16  
0 ... 9, 40  
Clear Entry, 40  
E, 40  
Enter, 40  
error messages, 29  
75  
Index  
RS-232, 53  
connections  
interface commands, 23  
—M—  
manuals, 9, 15  
Meter AC+DC, 32  
meter display keys  
Harmonic, 35  
Input, 35  
data format, 23  
handshake, 24  
pinouts, 23  
Meter, 35  
—S—  
safety class, 10  
safety summary, 3  
safety warning, 10  
saving operating states, 53  
self-test, 25  
selftest errors, 29  
sense connections, 20  
service guide, 10  
shift annunciator, 26  
shift key, 26  
—N—  
—O—  
non-volatile memory  
clearing, 53  
storing, 33  
operating features, 11  
options, 10  
output  
Slew rates  
programming, 50  
specifications, 55  
Step, 44  
supplemental characteristics, 56  
SYSTem  
characteristic, 12  
connections, 19  
connector, 15  
rating, 12  
setting output protection, 43  
setting the amplitude, 41, 54  
setting the frequency, 43  
Output AC+DC, 32  
output checkout, 26  
output control keys  
Current, 36  
Freq, 36  
Voltage, 36  
OVLD, 29  
LOCal, 23  
REMote, 23  
RWLock, 23  
system errors, 71  
system keys, 33  
Address, 33  
Error, 33  
Interface, 33  
Local, 33  
RCL, 33  
Save, 33  
Shift, 33  
—P—  
Peak Inrush current  
measuring, 52  
Phase synchronization, 47  
power cord, 15  
installation, 17  
power receptacle, 10  
preliminary checkout, 25  
print date, 6  
—T—  
transient voltage  
fixed, 44  
list, 44, 46  
pulse, 45  
step, 44  
transient voltage mode, 44  
trigger connections, 21  
Trigger delays, 47  
trigger IN, 21  
program listing  
calibration, 67  
protection/status keys  
Protect, 38  
trigger OUT, 21  
trigger/list keys  
List, 39  
Status, 38  
Pulse, 45  
Trigger Control, 39  
turn-on checkout, 25, 60  
—R—  
rack mount kit, 10  
rack mounting, 16  
—V—  
recalling operating states, 53  
remote programming, 12  
remote sensing, 20  
OVP considerations, 21  
repacking, 15  
verification, 26  
ac measurement accuracy, 61  
ac voltage programming, 61  
equipment, 59  
76  
Index  
rms current accuracy, 61  
setup, 60  
test record, 62  
verification tests, 25  
voltage control, 12  
—W—  
warranty, 2  
Waveform  
generation, 50  
wire  
current ratings, 19  
wiring considerations, 19  
77  
Agilent Sales and Support Offices  
For more information about Agilent Technologies test and measurement products, applications,  
services, and for a current sales office listing, visit our web site:  
You can also contact one of the following centers and ask for a test and measurement sales  
representative.  
United States:  
Latin America:  
Agilent Technologies  
Test and Measurement Call Center  
P.O. Box 4026  
Englewood, CO 80155-4026  
(tel) 1 800 452 4844  
Agilent Technologies  
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5200 Blue Lagoon Drive, Suite #950  
Miami, Florida 33126  
U.S.A.  
(tel) (305) 267 4245  
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Canada:  
Australia/New Zealand:  
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Mississauga, Ontario  
L4W 5G1  
Agilent Technologies Australia Pty Ltd  
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Forest Hill, Victoria 3131  
(tel) 1-800 629 485 (Australia)  
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Asia Pacific:  
Agilent Technologies  
Test & Measurement European Marketing Organisation  
P.O. Box 999  
1180 AZ Amstelveen  
The Netherlands  
Agilent Technologies  
24/F, Cityplaza One, 1111 King’s Road,  
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tel: (852)-3197-7777  
fax: (852)-2506-9284  
(tel) (31 20) 547 9999  
Japan:  
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Measurement Assistance Center  
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Tokyo 192-8510, Japan  
(tel) (81) 426 56 7832  
(fax) (81) 426 56 7840  
Technical data is subject to change.  
78  
Manual Updates  
The following updates have been made to this manual since the print revision indicated on the  
title page.  
4/15/00  
All references to HP have been changed to Agilent.  
All references to HP-IB have been changed to GPIB.  

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