Tektronix Thermometer 070 9472 02 User Manual

Instruction Manual  
P5205  
High Voltage Differential Probe  
070-9472-02  
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WARRANTY  
Tektronix warrants that the products that it manufactures and sells will be free from defects  
in materials and workmanship for a period of one (1) year from the date of purchase from  
an authorized Tektronix distributor. If any such product proves defective during this  
warranty period, Tektronix, at its option, either will repair the defective product without  
charge for parts and labor, or will provide a replacement in exchange for the defective  
product. Batteries are excluded from this warranty.  
In order to obtain service under this warranty, Customer must notify Tektronix of the defect  
before the expiration of the warranty period and make suitable arrangements for the  
performance of service. Customer shall be responsible for packaging and shipping the  
defective product to the service center designated by Tektronix, shipping charges prepaid,  
and with a copy of customer proof of purchase. Tektronix shall pay for the return of the  
product to Customer if the shipment is to a location within the country in which the  
Tektronix service center is located. Customer shall be responsible for paying all shipping  
charges, duties, taxes, and any other charges for products returned to any other locations.  
This warranty shall not apply to any defect, failure or damage caused by improper use or  
improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish  
service under this warranty a) to repair damage resulting from attempts by personnel other  
than Tektronix representatives to install, repair or service the product; b) to repair damage  
resulting from improper use or connection to incompatible equipment; c) to repair any  
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a  
product that has been modified or integrated with other products when the effect of such  
modification or integration increases the time or difficulty of servicing the product.  
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE  
LISTED PRODUCTS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR  
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED  
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR  
PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE  
DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY  
PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.  
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY  
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES  
IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS  
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  
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Table of Contents  
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
v
Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
vii  
viii  
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Features and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
1
1
6
7
Operating Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Operating the Probe Safely . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Minimizing Risk of RF Burn (probe leads) . . . . . . . . . . . . .  
Maximum Input Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Operating Characteristics and Probing Techniques . . . . . . . . .  
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Overrange Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Common-Mode Rejection . . . . . . . . . . . . . . . . . . . . . . . . . .  
Twisting the Input Leads . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Extension Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Probe Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
9
9
10  
10  
11  
11  
12  
12  
12  
13  
14  
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Warranted Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Nominal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
15  
15  
17  
19  
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Servicing the Compensation Box . . . . . . . . . . . . . . . . . . . . . . .  
Replacing TEKPROBE Interface Pins . . . . . . . . . . . . . . . .  
Removing and Replacing the TEKPROBE Interface  
21  
21  
21  
21  
Collar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Removing the Compensation Box Covers . . . . . . . . . . . . . .  
Packaging For Return Shipment . . . . . . . . . . . . . . . . . . . . . . . .  
23  
24  
25  
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Construction of Modified BNC Adapter . . . . . . . . . . . . . . . . . .  
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Differential Gain Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
27  
28  
29  
30  
P5205 Instruction Manual  
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Table of Contents  
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
DC CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
32  
33  
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . .  
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Mfr. Code to Manufacturer Cross Index . . . . . . . . . . . . . . .  
35  
35  
35  
36  
36  
P5205 Instruction Manual  
ii  
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Table of Contents  
List of Figures  
Figure 1: P5205 High-Voltage Differential Probe . . . . . . . . . . .  
Figure 2: Safety limits (voltage between either input and  
2
earth ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Figure 3: Twisting the input leads . . . . . . . . . . . . . . . . . . . . . . .  
Figure 4: HF transient response with and without extension  
leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Figure 5: Typical common-mode rejection ratio  
11  
13  
14  
(50X attenuation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Figure 6: Input impedance vs. frequency . . . . . . . . . . . . . . . . .  
Figure 7: Replacing TEKPROBE interface pins . . . . . . . . . . . .  
Figure 8: Replacing the TEKPROBE collar . . . . . . . . . . . . . . .  
Figure 9: Removing the compensation box covers . . . . . . . . . .  
Figure 10: Replacing the compensation box cover . . . . . . . . . .  
Figure 11: BNC-male-to-dual binding post adapter . . . . . . . . .  
Figure 12: Removing plastic covers from binding posts . . . . .  
Figure 13: Slide probe leads onto the binding posts . . . . . . . . .  
Figure 14: P5205 Probe and replaceable accessories . . . . . . . .  
Figure 15: Replaceable parts - compensation box . . . . . . . . . .  
Figure 16: P5205 optional accessories . . . . . . . . . . . . . . . . . . .  
18  
19  
22  
23  
24  
25  
28  
29  
31  
37  
39  
40  
P5205 Instruction Manual  
iii  
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Table of Contents  
List of Tables  
Table 1: Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
8
15  
16  
17  
18  
19  
27  
34  
Table 2: Warranted Electrical Characteristics . . . . . . . . . . . . .  
Table 3: Certifications and Compliances . . . . . . . . . . . . . . . . .  
Table 4: Typical Electrical Characteristics . . . . . . . . . . . . . . . .  
Table 5: Typical Mechanical Characteristics . . . . . . . . . . . . . .  
Table 6: Nominal Electrical Characteristics . . . . . . . . . . . . . .  
Table 7: List of Equipment Required . . . . . . . . . . . . . . . . . . . .  
Table 8: Parts List Column Descriptions . . . . . . . . . . . . . . . . .  
P5205 Instruction Manual  
iv  
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General Safety Summary  
Review the following safety precautions to avoid injury and prevent  
damage to this product or any products connected to it. To avoid  
potential hazards, use this product only as specified.  
Only qualified personnel should perform service procedures.  
Observe Maximum Working Voltage  
Do not use the P5205 above 1,000 VRMS CAT II from ground on  
either input or 1,300 V (DC + peak AC) between the leads.  
To Avoid Fire or Personal Injury  
Avoid RF Burns While Handling Probe. To avoid RF burns, do not handle  
the probe while the input leads are connected to circuits above the  
voltage and frequency limits specified in Figure 2 on page 11. Use  
only probe accessories that are rated for the application.  
Connect and Disconnect Properly. Connect the probe output to the  
measurement instrument before connecting the probe to the circuit  
under test. Disconnect the probe input and the probe ground from the  
circuit under test before disconnecting the probe from the measure-  
ment instrument.  
Ground the Product. This product is indirectly grounded through the  
grounding conductor of the mainframe power cord. To avoid electric  
shock, the grounding conductor must be connected to earth ground.  
Before making connections to the input or output terminals of the  
product, ensure that the product is properly grounded.  
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all  
ratings and markings on the product. Consult the product manual for  
further ratings information before making connections to the product.  
Use Proper AC Adapter. Use only the AC adapter specified for this  
product.  
Do Not Operate Without Covers. Do not operate this product with  
covers or panels removed.  
Avoid Exposed Circuitry. Do not touch exposed connections and  
components when power is present.  
P5205 Instruction Manual  
v
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General Safety Summary  
Do Not Operate With Suspected Failures. If you suspect there is damage  
to this product, have it inspected by qualified service personnel.  
Do Not Operate in Wet/Damp Conditions.  
Do Not Operate in an Explosive Atmosphere.  
Keep Product Surfaces Clean and Dry.  
Safety Terms and Symbols  
Terms in This Manual. These terms may appear in this manual:  
WARNING. Warning statements identify conditions or practices that  
could result in injury or loss of life.  
CAUTION. Caution statements identify conditions or practices that  
could result in damage to this product or other property.  
Terms on the Product. These terms may appear on the product:  
DANGER indicates an injury hazard immediately accessible as you  
read the marking.  
WARNING indicates an injury hazard not immediately accessible as  
you read the marking.  
CAUTION indicates a hazard to property including the product.  
Symbols on the Product. These symbols may appear on the product:  
Double  
Insulated  
Protective Ground  
(Earth) Terminal  
CAUTION  
Refer to Manual  
WARNING  
High Voltage  
P5205 Instruction Manual  
vi  
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Service Safety Summary  
Only qualified personnel should perform service procedures. Read  
this Service Safety Summary and the General Safety Summary before  
performing any service procedures.  
Do Not Service Alone. Do not perform internal service or adjustments  
of this product unless another person capable of rendering first aid  
and resuscitation is present.  
Use Care When Servicing with Power On. Dangerous voltages or currents  
may exist in this product. Disconnect power, remove battery (if  
applicable), and disconnect test leads before removing protective  
panels, soldering, or replacing components.  
To avoid electric shock, do not touch exposed connections.  
P5205 Instruction Manual  
vii  
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Service Safety Summary  
Contacting Tektronix  
Phone  
1-800-833-9200*  
Address  
Tektronix, Inc.  
14200 SW Karl Braun Drive  
P.O. Box 500  
Beaverton, OR 97077  
USA  
Web site  
Sales support  
Service support  
Technical support  
1-800-833-9200, select option 1*  
1-800-833-9200, select option 2*  
1-800-833-9200, select option 3*  
1-503-627-2400  
6:00 a.m. - 5:00 p.m. Pacific time  
*
This phone number is toll free in North America. After office  
hours, please leave a voice mail message.  
Outside North America, contact a Tektronix sales office or  
distributor; see the Tektronix web site for a list of offices.  
P5205 Instruction Manual  
viii  
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Getting Started  
This section describes the High Voltage Differential Probe and gives  
instructions on how to install and functionally test the probe.  
Features and Accessories  
The P5205 probe shown in Figure 1 provides a safe means of  
measuring circuits with floating high voltages. The probe outputs a  
low-voltage, ground-referenced signal for display on instruments  
with the TEKPROBE interface (or any oscilloscope or other  
measurement instrument when used with the Tektronix 1103  
TEKPROBE power supply).  
To protect you from RF and high voltage, the case of the probe is  
nonconductive, internally shielded, and isolated. The internal shield  
connects to earth ground through the output lead. The case of the  
probe and control buttons are isolated and double insulated. This  
protection extends up to the full input rating of the probe.  
The accessories supplied with the probe meet the same safety  
standards as the probe. You may use other accessories if they are  
approved for the maximum voltage present in your application and  
have the same style and size connectors.  
The P5205 probe allows clear and accurate measurements of  
high-speed transitions and provides excellent rejection of common-  
mode signals. Both inputs have high impedance and low capacitance.  
Because of these features, the probe can safely measure the fast  
voltage transients in switching power devices without damaging  
them.  
Other applications for the P5205 probe include testing high-voltage  
motor control circuits and line-connected circuits in switch-mode  
power supplies.  
For a complete list of replaceable accessories and part ordering  
information, see the Replaceable Parts section, starting on page 35.  
P5205 Instruction Manual  
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Getting Started  
ON  
Figure 1: High Voltage Differential Probe  
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Getting Started  
The P5205 has several features and accessories that make probing  
and measurement a simpler task. Take a moment to familiarize  
yourself with these items and their uses.  
Differential Inputs. The inputs are rated to safely accept  
a maximum of 1,000 VRMS CAT II between either  
input and earth ground and a maximum difference of  
1,300 V (DC + peak AC) between the inputs.  
NOTE. The input safety ratings are valid for both  
attenuation range settings. However, for useful  
measurements, the input should be kept to the  
operating limits of the selected attenuation range of  
130 V up to 1,300 V (DC + peak AC).  
Attenuation Range. In the raised position the range  
button sets the attenuation to 500X. In the lowered  
position the range button sets the attenuation to 50X.  
Use the 500X position for measurements up to a  
maximum of 1,300 V (DC + peak AC) differential. Use  
the 50X position for better signal resolution on  
connections below 130 V (DC + peak AC).  
Overrange Indicator. The overrange indicator lights red  
if the voltage of the input signal exceeds the linear  
operating range of the probe. When this happens, the  
signal on the probe output does not accurately represent  
the signal on the probe input.  
Audible Overrange. In the raised position the overrange  
button sets the audible alarm to sound whenever the  
overrange indicator lights.  
Bandwidth Select. In the raised position the bandwidth  
button sets the full bandwidth (100 MHz minimum). In  
the lowered position the bandwidth is restricted to  
approximately 5 MHz.  
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Getting Started  
Input Leads. The input leads of the differential probe  
connect to the crocodile clips and plunger clamps that  
come with the probe. The connectors are 4 mm  
insulated banana plugs and are double insulated for  
safety.  
NOTE. Use only accessories that are rated to the  
maximum input voltage of the P5205 probe.  
Extension Leads and Adapters. To measure the potential  
between widely separated points, connect the extension  
leads to the input leads with the supplied adapters. Use  
both extension leads to minimize distortion caused by  
mismatched lead length.  
NOTE. Above 10 MHz, the extension leads degrade the  
high frequency performance of the P5205 probe. See  
Figure 4 on page 14.  
Plunger Clamps. The plunger clamps have long sleeves  
with retracting hooks. These clamps connect safely to  
recessed test points that are otherwise difficult to reach.  
The connectors are double insulated for safety.  
Crocodile Clips. The large insulated clips connect easily  
to large bolts or bus bars. The connectors are double  
insulated for safety.  
TEKPROBE Interface. The TEKPROBE interface  
provides power, signal, and probe characteristic data  
transfer.  
If your oscilloscope does not support the TEKPROBE  
interface, you can use the optional 1103 probe power  
supply as an effective interface. Contact your local  
Tektronix representative for more information.  
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Getting Started  
Zero Adjust. The zero adjust allows you to set the probe  
output to the zero reference point prior to making  
measurements. Use the adjustment tool provided.  
Soft Case. The soft case protects the probe and allows  
you to hang the probe near the point of measurement.  
Install or remove the case by opening the access doors  
on the back.  
When not in use, coil the leads and secure them with  
the strap on the back. Use one of the loops to hang the  
probe on a storage hook or utility belt.  
Color Marker Bands. When you are using more than one  
probe, the bands enable you to quickly distinguish  
between probes and the channels they are connected to.  
To use the marker bands, attach one band near the  
probe head and the matching band near the compensa-  
tion box.  
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Getting Started  
Installation  
Install the P5205 probe as follows:  
1. Connect the output of the probe to the TEKPROBE input of the  
oscilloscope or other measurement instrument. The measurement  
instrument input must have a ground reference.  
NOTE. Use the 1103 TEKPROBE Power supply if the instrument does  
not have the TEKPROBE interface.  
2. Select the proper range setting. For higher resolution and less  
noise when measuring signals below 130 V, switch the attenua-  
tion to 50X. If the overrange indicator lights or flashes, the output  
signal may not be accurate. Use the 500X setting instead.  
3. The probe output is adjusted to zero at the factory. Adjust the  
probe output to zero only if you need to measure small differen-  
tial voltages. Follow steps a and b to make the adjustment.  
a. Let the probe warm up for at least 20 minutes.  
b. Connect the input leads of the probe together. Insert the  
adjustment tool in the access hole of the compensation  
box and adjust the probe to the zero reference point.  
If you are using this probe for the first time, read the General Safety  
Summary on page v, and read page 9 of the Operating Basics section  
for important safety information.  
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Getting Started  
Functional Check  
To make a simple functional check of the P5205 probe, select a  
source that supplies AC line voltage and use the following  
procedure. This procedure verifies a majority of the circuitry within  
the probe. For a complete performance verification, refer to the  
Performance Verification section starting on page 27.  
1. Use the installation procedure starting on page 6 to connect the  
output of the P5205 probe to a measurement instrument.  
2. Connect the inputs, set the range, and perform the check as each  
line of Table 1, below, indicates.  
Table 1: Functional check  
Input 1  
(+ or -)  
Input 2  
(- or +)  
Range  
setting  
Mode  
Check  
Hot  
Ground or  
Neutral  
Differential  
500X  
(out)  
Measurement instrument  
displays or indicates the line  
voltage  
50X  
(in)  
Overrange indicator lights if  
the input is 150 Vp  
Hot (same Common  
connection) Mode  
50X or 500X No signal  
This completes the functional check procedure.  
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Getting Started  
P5205 Instruction Manual  
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Operating Basics  
To help you use the High Voltage Differential Probe safely and  
effectively, this section provides important information about safety  
limits, operating characteristics, and probing techniques.  
WARNING. Due to the inherent hazards associated with taking  
high-voltage measurements, the product is intended for use by  
qualified personnel who have had the training to make these types of  
measurements. Read and follow the precautions specified in this  
manual.  
Before you make any oscilloscope measurement, observe all safety  
precautions described in the user and service manuals for the  
equipment you are working on. Some general rules about using and  
servicing electrical equipment are worth repeating here.  
H Observe the safety instruction symbols for the equipment you are  
working on.  
H Consult the instruction or service manuals for the equipment you  
are working on.  
H Don’t operate or service an electrical device in an explosive  
atmosphere.  
H Avoid personal injury by never touching exposed connections or  
components in the circuit-under-test when the power is on.  
Operating the Probe Safely  
Before connecting the inputs of the probe to a circuit, read the safety  
information in this section, and attach the appropriate accessories to  
the input connectors of the probe.  
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Operating Basics  
Minimizing Risk of RF Burn (probe leads)  
WARNING. To avoid personal injury, do not handle the probe leads  
when the leads are connected to a source that is above the voltage  
and frequency limits given in Figure 2 on page 11. The area above  
these limits poses a risk of radio frequency (RF) burns.  
If you need to use the probe within the risk area for RF burn, power  
down the source before connecting or disconnecting the probe leads.  
Maximum Input Limits  
CAUTION. To avoid damaging the input circuitry of the P5205 probe,  
do not apply a voltage that is more than 1,000 VRMS CAT II between  
either input and ground or more than 1,300 V (DC + peak AC)  
between the two inputs. Above 3 MHz, the voltage limit decreases as  
frequency increases. See Figure 2 on page 11. The input limit applies  
to both the 50X and 500X settings.  
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Operating Basics  
Category II maximum  
voltage limit (1,000 V)  
RF burn risk area  
(shaded)  
Voltage derating  
with frequency  
1000 V  
500 V  
Voltage  
(RMS)  
100 V  
50 V  
DC or 0 100 k  
500 k 1 M  
5 M 10 M  
50 M 100 M  
Frequency (Hz)  
Figure 2: Safety Limits (voltage between either input and earth ground)  
Operating Characteristics and Probing Techniques  
This section explains the operating characteristics of the High  
Voltage Differential Probe along with techniques you can use to  
maximize the performance of the probe.  
Operating Limits  
The P5205 probe has two operating ranges that you select with the  
ATTENUATION button on the front panel:  
H Select the 50X range for inputs of 0 V to 130 V (DC + peak AC).  
H Select the 500X range for inputs of 130 V to 1300 V (DC +  
peak AC).  
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Operating Basics  
Both ranges are rated for the maximum input limits, but you can  
obtain a useful measurement only if the voltage you apply is within  
the specified limits of the operating range.  
Overrange Detection  
Differential voltage outside the operating range will overdrive the  
circuitry of the probe and distort the output signal. When this  
differential overrange occurs, the probe detects the condition and  
lights the overrange indicator. With the Audible Overrange ON, the  
probe will also emit an audible alarm.  
Common-mode voltage greater than 1,000 VRMS can distort the  
output signal, but the probe will not indicate an overrange condition.  
Common-Mode Rejection  
The common-mode rejection ratio (CMRR) is the specified ability of  
P5205 probe to reject signals that are common to both inputs. More  
precisely, CMRR is the ratio of the differential gain to the common-  
mode gain. The higher the ratio, the greater the ability of probe to  
reject common-mode signals. For exact specifications, see pages 15  
and 17.  
Common mode rejection decreases as the input frequency increases.  
Figure 5 on page 18 is a plot of typical CMRR of the probe versus  
input frequency. For example, if you apply a 60 Hz line voltage of  
500 VP-P to both input leads of the probe, the probe rejects the signal  
by 80 dB (typical) and the signal appears as only a 50 mVP-P signal  
on the oscilloscope screen.  
To maximize the rejection of common-mode signals, twist the input  
leads together as shown in Figure 3 on page 13, and do not use the  
extension leads.  
Twisting the Input Leads  
Twisting the input leads as shown in Figure 3 helps to cancel noise  
that is induced into the input leads and to improve the high-frequen-  
cy response of the inputs. For the best response possible, do not use  
the extension leads.  
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Operating Basics  
Figure 3: Twisting the input leads  
Extension Leads  
The extension leads allow you to reach widely spaced connection  
points. Connect the extension leads to the input leads using the  
adapters provided. Be sure to use both extension leads so that the  
input leads are the same length.  
The extension leads, however, do affect the high-frequency  
performance of the probe. With longer lead length, differential noise  
induced into the input leads is greater. Also, because of the added  
inductance of the leads, voltage measurements at frequencies above  
approximately 10 MHz may not be as precise. Figure 4 on page 14  
shows the affect on HF transient response.  
The extension leads do not affect the performance of the probe when  
bandwidth is set to 5 MHz.  
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Operating Basics  
With extension leads  
Without extension leads  
50 ns/div  
50 ns/div  
Figure 4: HF Transient response with and without extension leads  
Probe Loading  
When you touch your probe tip to a circuit element, you are  
introducing a new resistance, capacitance, and inductance into the  
circuit.  
Frequency and impedance of the source determine how much the  
probe loads the circuit you are measuring. As the frequency of the  
source starts to increase beyond 1 kHz, the input impedance of the  
probe begins to decrease. The lower the impedance of the probe  
relative to that of the source, the more the probe loads the circuit  
under test. For a graph of frequency versus input impedance, refer to  
Figure 6 on page 19.  
The probe has virtually no loading effect on sources with relatively  
low impedance and low frequency.  
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Specifications  
The specifications in Tables 2 through 6 apply to a P5205 probe  
installed on a Tektronix TDS 460A oscilloscope. When the probe is  
used with another oscilloscope, the oscilloscope must follow these  
specifications:  
H An input impedance of 1 MΩ  
H An input capacitance range of between 15 and 20 pF  
H A bandwidth greater than 400 MHz  
The probe must have a warm-up period of at least 20 minutes and be  
in an environment that does not exceed the limits described in  
Table 2.  
Specifications for the P5205 probe fall into three categories:  
warranted, typical, and nominal characteristics.  
WARNING. Special fixtures are required to examine specifications at  
the maximum frequency and voltage levels and should be conducted  
only by qualified Service Personnel. See the Service section for more  
detail.  
Warranted Characteristics  
Warranted characteristics in Tables 2 and 3 describe guaranteed  
performance within tolerance limits or certain type-tested require-  
ments. Warranted characteristics that have checks in the Perfor-  
mance Verification section appear in boldface type.  
Table 2: Warranted Electrical Characteristics  
DC Common Mode Rejection Ratio  
Bandwidth  
> 3000:1 at 500 VDC, 20-30_ C, <70% RH  
DC to 100 MHz (-3 dB)  
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Specifications  
Table 2: Warranted Electrical Characteristics (Cont.)  
Maximum Operating Input Voltage  
500X differential: 1.3 kV (DC + peak AC)  
500X common mode: 1 kV CAT II  
RMS  
50X differential: 130 V (DC + peak AC)  
50X common mode: 1 kV CAT II  
RMS  
Maximum Nondestructive Input Voltage  
500X and 50X differential: 1.5 kV (DC +  
peak AC)  
500X and 50X common mode: 1.3 kV  
RMS  
CAT II  
Gain Accuracy  
3% at 20-30_ C, <70% RH  
Temperature  
Operating: 0 to 40_ C  
Nonoperating: -30 to +70_ C  
Humidity  
Operating: <85% RH at or below +35_ C  
Nonoperating: <85% RH at or below  
+60_ C  
Table 3: Certifications and Compliances  
EC Declaration of  
Conformity -- Low  
Voltage  
Compliance was demonstrated to the following specification as  
listed in the Official Journal of the European Communities:  
Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC:  
EN 61010-1/A2:1995  
Safety requirements for electrical equipment for  
measurement, control, and laboratory use  
EN 61010-2-031:1994  
Particular requirements for hand-held probe assemblies for  
electrical measurement and test equipment  
Approvals  
UL3111-1 - Standard for electrical measuring and test equipment  
IEC 10106-2-031 - Particular requirements for hand-held probe  
assemblies for electrical measurement and test  
CAN/CSA-C22.2 No. 1010.1-92 and CAN/CSA-C22.2 No.  
1010.2.031-94 - Safety requirements for electrical equipment for  
measurement, control, and laboratory use  
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Specifications  
Table 3: Certifications and Compliances (Cont.)  
Installation Category Terminals on this product may have different installation category  
Descriptions  
designations. The installation categories are:  
CAT III Distribution-level mains (usually permanently  
connected). Equipment at this level is typically  
in a fixed industrial location  
CAT II Local-level mains (wall sockets). Equipment at  
this level includes appliances, portable tools,  
and similar products. Equipment is usually  
cord-connected  
CAT I  
Secondary (signal level) or battery operated  
circuits of electronic equipment  
Pollution Degree 2  
Do not operate in environments where conductive pollutants may  
be present.  
Typical Characteristics  
Typical characteristics in Tables 4 and 5 describe typical but not  
guaranteed performance.  
Table 4: Typical Electrical Characteristics  
Rise Time  
3.5 ns  
5 MHz  
Bandwidth Limit  
60 Hz: > 10,000:1  
100 kHz: > 300:1  
100 MHz: > 300:1  
AC Common-Mode Rejection Ratio  
(20-30_C, <70% RH)  
See Figure 5 on page 18  
AC Noise  
(referenced to input)  
50X: < 50 mV  
500X: < 300 mV  
RMS  
RMS  
Input Impedance  
8 M, 3.5 pF between inputs  
4 M, 7 pF between each input and ground  
See Figure 6  
Propagation Delay  
17 nS  
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Specifications  
Table 4: Typical Electrical Characteristics (Cont.)  
Overdrive Recovery  
Zero Adjust  
< 50 ns to 10% of final value after 10X  
overdrive (50X range only)  
50X: 0.5 V  
500X: 5 V  
40 dB  
50 dB  
60 dB  
70 dB  
80 dB  
90 dB  
1 Hz  
10 Hz  
100 Hz  
1 kHz  
10 kHz  
100 kHz  
1 MHz  
Frequency  
Figure 5: Typical Common-Mode Rejection Ratio (50X Attenuation)  
Table 5: Typical Mechanical Characteristics  
Dimensions, Case  
7.2 in × 2.6 in × 1.3 in  
(185 mm × 66 mm × 32 mm)  
Dimensions, Input Leads  
Dimensions, Output Cable  
12 in (30 cm)  
6 ft (1.8 m)  
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Specifications  
Table 5: Typical Mechanical Characteristics (Cont.)  
Unit Weight (probe only)  
11 oz (315 g)  
3 lb, 2 oz (1.42 kg)  
Shipping Weight (with accessories)  
10 M  
1 M  
100 k  
10 k  
1 k  
100  
1
10  
100  
1 k  
10 k 100 k  
1 M  
10 M  
100 M  
Frequency (Hz)  
Figure 6: Input Impedance vs. Frequency  
Nominal Characteristics  
Nominal characteristics in Table 6 on page 19 describe guaranteed  
traits, but the traits do not have tolerance limits.  
Table 6: Nominal Electrical Characteristics  
Input Type  
Balanced differential  
Output Type  
Single-ended. Source Impedance of 50 Ω  
drives 1 Moscilloscope input. Load  
impedance must be greater than 50 kfor  
stated accuracy  
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Specifications  
Table 6: Nominal Electrical Characteristics (Cont.)  
Gain  
Switchable: 1/50 (“50X”) and 1/500 (“500X”)  
Audible Overrange  
Audible over range sounds whenever ON,  
and over range LED is lit.  
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Maintenance  
Refer to this section for information about maintaining and servicing  
the High Voltage Differential Probe.  
For terms of the product warranty, refer to the front of this manual.  
Should the probe require replacement under terms of the warranty,  
return the probe to a Tektronix service center. Refer to page 25 for  
packaging instructions.  
For a list of replaceable parts, refer to the Replaceable Parts section  
on page 35.  
For further assistance, refer to Contacting Tektronix on page viii.  
Cleaning  
Remove dirt with a soft cloth dampened in a mild detergent and  
water solution or isopropyl alcohol.  
CAUTION. To avoid damaging the probe, use only a mild detergent  
and water solution or isopropyl alcohol, do not use any other  
solvents or abrasive cleaners. Do not immerse the probe.  
Servicing the Compensation Box  
Some components of the compensation box can be serviced. These  
components include the TEKPROBE interface pins, the probe collar,  
and the compensation box covers.  
Replacing TEKPROBE Interface Pins  
TEKPROBE interface pins can stick and fail to make contact after  
time. Periodically check each of the interface pins. Replace any pin  
that fails to move freely and fully extend.  
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Maintenance  
To remove a TEKPROBE interface pin, firmly grasp the pointed tip  
with pliers and pull the pin out of the connector. See Figure 7.  
No tools are required to install a replacement pin. Insert a new pin  
into the connector socket as far as possible using finger pressure. If  
necessary, seat the pin into the connector by pressing the tip of the  
pin gently but firmly against a hard surface.  
Figure 7: Replacing TEKPROBE interface pins  
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Maintenance  
Removing and Replacing the TEKPROBE Interface Collar  
To remove the TEKPROBE interface collar, firmly grasp the  
compensation box body with one hand, and the TEKPROBE  
interface collar with the other hand. Firmly pull the interface collar  
off.  
To replace the collar, note the pin configuration on the compensation  
box and their holes in the interface collar. The group of three pins fit  
through the smaller of the two holes in the interface collar. See  
Figure 8.  
Align the tab to the slot and gently press the two pieces together. See  
Figure 8.  
Once installed, the TEKPROBE collar should rotate freely to lock  
and unlock.  
Tab  
Slot  
Figure 8: Replacing the TEKPROBE collar  
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Maintenance  
Removing the Compensation Box Covers  
To open the compensation box, follow these steps:  
1. Press the optional release tool pins into the compensation box  
cover catches and gently lift the cover off a small distance. Refer  
to Figure 9, below.  
2. Hold the open edge apart, and use the tool to open the other side  
of the compensation box.  
3. With both sides of the box open, gently separate the two halves of  
the compensation box.  
Cover  
catches  
Figure 9: Removing the compensation box covers  
Replacing the Compensation Box Covers  
To replace the covers, follow these steps:  
1. Align the TEKPROBE interface and the strain relief notches with  
the tabs on the cover. Refer to Figure 10 on page 25.  
2. Press the catches of the bottom cover in and lower the top cover.  
3. Slide the tab into the notch.  
4. Firmly press the pieces together until the cover catches snap into  
place.  
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Maintenance  
Tab  
Figure 10: Replacing the compensation box cover  
Packaging For Return Shipment  
If possible, use the original packaging to return the probe to  
Tektronix. Include the following information: name of purchaser,  
return address, name and phone number of a person that Tektronix  
may contact, date of purchase, and a description of the defect.  
If the original packaging is unfit for use or not available, use the  
following packaging guidelines:  
1. Select a sturdy shipping carton that has inside dimensions at least  
one inch greater than the probe dimensions.  
2. Put the probe into a plastic bag or wrap to protect it from  
dampness.  
3. Place the probe into the box and stabilize it with light packing  
material. Seal the carton with shipping tape.  
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Maintenance  
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WARNING  
The following servicing instructions are for use only by  
qualified personnel. To avoid injury, do not perform any  
servicing other than that stated in the operating instructions  
unless you are qualified to do so. Refer to all safety  
summaries before performing any service.  
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Performance Verification  
The following procedure verifies the warranted electrical characteris-  
tics of the High Voltage Differential Probe. Table 7 itemizes the  
equipment required, provides an example or part number of the  
equipment, and explains the purpose of the equipment.  
Table 7: List of equipment required  
Minimum  
requirements  
Example or part  
number  
Description  
Purpose  
Test oscilloscope Bandwidth: 400 MHz TDS460A,  
Display probe output  
TEKPROBE interface  
vertical accuracy:  
1.5%  
TDS744A, or  
TDS784A  
Standard ampli-  
tude generator  
Leveled sine wave Rise time: 3 ns  
generator  
DC voltage source  
Amplitude accuracy:  
0.75%  
Fluke/Wavetek  
Check probe attenua-  
9100 with oscillo- tion, bandwidth, and  
scope option 250 common-mode rejec-  
tion ratio  
Plunger clamps  
(2 required)  
Use clamps included in Accessory kit  
accessory kit  
Connection to binding  
post  
020-2106-00  
Modified BNC  
adapter  
BNC-male-to-dual  
binding post  
103-0035-00  
Interconnection be-  
tween probe and gen-  
erator. (See Figure 11  
on page 28).  
BNC adapter  
BNC-female-to-dual  
banana  
103-0090-00  
012-0482-00  
011-0049-01  
Interconnection be-  
tween probe and gen-  
erator  
Coaxial cables  
(2 required)  
36 in (0.9144 m),  
precision 50 Ω  
Interconnection  
between oscilloscope  
and generator  
Terminator  
Termination between  
probe and generator  
during bandwidth mea-  
surements  
50 precision feed  
through  
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Performance Verification  
Construction of Modified BNC Adapter  
Construct the modified BNC Adapter from a BNC-male-to-dual  
binding post adapter, Tektronix part number 103-0035-00 (see  
Figure 11).  
Black and red plastic  
post covers  
Figure 11: BNC-male-to-dual binding post adapter  
To expose the posts that you will connect the P5205 High-Voltage  
Differential probe leads to, remove the black and red plastic post  
covers of the BNC-male-to-dual adapter. Use a pair of pliers and a  
vise to remove the plastic covers, as shown in Figure 12 on page 29.  
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Performance Verification  
Pliers  
Plastic cover removed  
Modified BNC adapter  
Vise  
Figure 12: Removing plastic covers from binding posts  
Setup  
WARNING. These procedures require the application of high voltage  
to the inputs of the P5205 probe. Because this adapter has exposed  
metal surface, only qualified personnel should perform testing with  
voltage levels that exceed 30 V rms. All pertinent safety rules and  
guidelines for elevated voltage measurements should be followed and  
adhered to.  
Connect the output of the probe to the Channel 3 input of the test  
oscilloscope. Let the probe warm up for 20 minutes.  
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Performance Verification  
NOTE. These procedures assume that you are using an oscilloscope  
that automatically displays the correct volts/division scale factor for  
the attenuation setting of the probe. If not, you must take the  
attenuation setting of the probe into account when setting the  
volts/division on the oscilloscope.  
Differential Gain Accuracy  
1. Set the volts/division on channel 2 of the oscilloscope to 2 V.  
H Trigger on channel 2.  
H Select 1 Mimpedance (if option exists on oscilloscope).  
H Connect coaxial cable between TRIG OUT of the generator  
(rear of Wavetek 9100) and channel 2 of the oscilloscope.  
2. Set the volts/division on channel 1 of the oscilloscope to  
50 mV/div.  
3. Set the seconds/div to 200 s, and the acquisition mode to  
average 32.  
4. Connect the coaxial cable from SIG OUT of the generator (rear  
of Wavetek 9100) to channel 1 of the oscilloscope.  
5. Set the generator to 0.1 V and 1 kHz (AUX, square wave, 1 MΩ  
load). Enable the output.  
6. Select the amplitude measurement on the oscilloscope and record  
the DC amplitude (100 mV) of square wave. This measurement  
is only the oscilloscope.  
7. Disable the generator output. Disconnect the coaxial cable from  
channel 1 of the oscilloscope and SIG OUT of the generator.  
8. Connect the output of the probe to channel 1 of the oscilloscope.  
9. Attach the Modified BNC adapter to the SIG OUT of the  
generator.  
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Performance Verification  
10. Attach the differential probe input leads (without attachment  
accessories) by sliding the banana plug of the leads onto the  
binding posts metal sleeves on the Modified BNC adapter  
(see Figure 13).  
Modified BNC adapter  
(+) Post  
(-) Post  
Banana plug of probe  
input lead  
Figure 13: Slide probe leads onto the binding posts  
WARNING. To reduce the risk of electric shock, ensure the generator  
output is disabled before modifying/disconnecting test setup or  
connections since exposed metal may at a hazardous potential. It is  
recommended that the generator output amplitude be reduced to  
minimum prior to disabling the output.  
11. Set the probe to 500X (out). Set the generator for a 100 V and  
1 kHz standard amplitude output (AUX, square wave, 1 MΩ  
load).  
12. Reduce the amplitude on the generator to minimum then enable  
the output.  
13. Adjust the zero offset on the compensation box of the probe for  
zero offset.  
14. Record the DC amplitude of the square wave (100 V) and divide  
1/1000th of this into the amplitude of just the oscilloscope (refer  
to step 6). Verify that only the probe gain accuracy  
is 3%.  
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Performance Verification  
15. Set the calibration generator for 10 V output. Set the attenuation  
button on the probe to 50X (in).  
16. Record the DC amplitude of the square wave (10V) and divide  
1/100th of this into only the amplitude of the oscilloscope (refer  
to step 6). Verify that only the probe gain accuracy is 3%.  
17. Reduce the amplitude on the generator to minimum then disable  
the generator output, leaving the setup connected for the next  
procedure.  
Bandwidth  
1. Connect the Modified BNC adapter through a 50 terminator to  
the leveled sine wave output of the generator (AUX, Sine,  
50 load).  
WARNING. To reduce the risk of electric shock, ensure the generator  
output is disabled before modifying/disconnecting test setup or  
connections since exposed metal may at a hazardous potential. It is  
recommended that the generator output amplitude be reduced to  
minimum prior to disabling the output.  
2. Attach the differential probe input leads (without attachment  
accessories) by sliding the banana plug of the leads onto the  
binding posts metal sleeves on the Modified BNC adapter (see  
Figure 13 on page 31).  
3. Set the bandwidth on the probe to FULL and the attenuation  
button to 50X.  
4. Set the Volts/Division on channel 1 of the oscilloscope to  
500 mV, and sec/div to 20 s. Set the trace to the center of the  
oscilloscope.  
5. Reduce the amplitude on the generator to minimum then enable  
the output.  
6. Set the sine wave generator to 50 kHz, and adjust the amplitude  
to 3.00 V as measured on the oscilloscope.  
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Performance Verification  
7. Set the generator to 100 MHz, and set the oscilloscope to  
5 ns/division. Check for 2.1 V amplitude.  
8. Disconnect the setup.  
DC CMRR  
1. Set the attenuation of the probe to 50X.  
2. Set the oscilloscope input coupling to DC, the vertical to  
50 mV/div, and the seconds/div to 200 s. Center the trace on the  
display. Set the acquisition mode to average 32.  
3. Attach the BNC-female-to-dual-banana adapter to the DC output  
of the generator (front of Wavetek 9100). Attach the modified  
BNC adapter to the BNC-female-to-dual-banana adapter.  
4. Attach the plunger clamps on the differential probe input leads.  
5. Twist the input leads together as shown in Figure 3 on page 13,  
and connect both probe inputs to the positive terminal of the  
modified BNC adapter.  
6. Adjust the offset on the probe output to zero.  
WARNING. Generator produces hazardous voltages. To avoid risk of  
shock, do not touch exposed metal parts after the generator output is  
enabled.  
7. Set the output of the generator to 500 VDC.  
8. Enable the output.  
9. Check that the trace on the oscilloscope shifts less than 3.33  
divisions (167 mV) from center.  
10. Disable the generator output.  
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Performance Verification  
WARNING. To reduce the risk of electric shock, ensure the generator  
output is disabled before modifying/disconnecting test setup or  
connections since exposed metal may at a hazardous potential. It is  
recommended that the generator output amplitude be reduced to  
minimum prior to disabling the output.  
11. Disconnect all test equipment.  
This completes the performance verification procedure.  
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Replaceable Parts  
This section contains a list of the replaceable modules for the P5205  
probe. Use this list to identify and order replacement parts.  
Parts Ordering Information  
Replacement parts are available through your local Tektronix field  
office or representative.  
Changes to Tektronix instruments are sometimes made to accommo-  
date improved components as they become available and to give you  
the benefit of the latest circuit improvements. Therefore, when  
ordering parts, it is important to include the following information in  
your order:  
H Part number  
H Instrument type or model number  
H Instrument serial number  
H Instrument modification number, if applicable  
If you order a part that has been replaced with a different or  
improved part, your local Tektronix field office or representative will  
contact you concerning any change in part number.  
You may exchange your module for a remanufactured module. These  
modules cost significantly less than new modules and meet the same  
factory specifications. For more information about the module  
exchange program, refer to Contacting Tektronix on page viii.  
Using the Replaceable Parts List  
This section contains a list of the mechanical and/or electrical  
components that are replaceable for the P5205 probe. Use this list to  
identify and order replacement parts. Table 8 describes each column  
in the parts list.  
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Replaceable Parts  
Table 8: Parts List Column Descriptions  
Column Column Name  
Description  
1
Figure & Index Number  
Items in this section are referenced by figure and  
index numbers to the exploded view illustrations  
that follow.  
2
Tektronix Part Number  
Serial Number  
Use this part number when ordering replacement  
parts from Tektronix.  
3 and 4  
Column three indicates the serial number at  
which the part was first effective. Column four  
indicates the serial number at which the part was  
discontinued. No entries indicates the part is good  
for all serial numbers.  
5
6
Qty  
This indicates the quantity of parts used.  
Name & Description  
An item name is separated from the description  
by a colon (:). Because of space limitations, an  
item name may sometimes appear as incomplete.  
Use the U.S. Federal Catalog handbook H6-1 for  
further item name identification.  
7
8
Mfr. Code  
This indicates the code of the actual manufacturer  
of the part.  
Mfr. Part Number  
This indicates the actual manufacturer or vendor  
part number.  
Abbreviations  
Abbreviations conform to American National Standard ANSI  
Y1.1-1972.  
Mfr. Code to Manufacturer Cross Index  
The table titled Manufacturers Cross Index shows codes, names, and  
addresses of manufacturers or vendors of components listed in the  
parts list.  
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Replaceable Parts  
1
2
4
3
6
5
Figure 14: P5205 Probe and replaceable accessories  
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