Omega Speaker Systems Switch LVU 230 User Manual

Users Guide  
LL-100 Series  
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LVU-230  
LVU-260  
LVUC10  
Ultrasonic Point Level Switches  
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UNPACKING INSTRUCTIONS  
UNPACKING INSTRUCTIONS  
Remove the Packing List and verify that you have received all equipment, includ-  
ing the following (quantities in parentheses):  
Ultrasonic Level Switch (1)  
Operator’s Manual (1)  
If you have any questions about the shipment, please call the Omega Customer  
Service Department. When you receive the shipment, inspect the container and  
equipment for signs of damage. Note any evidence of rough handling in transit.  
Immediately report any damage to the shipping agent.  
Note:  
The carrier will not honor damage claims unless all shipping  
material is saved for inspection. After examining and removing  
contents, save packing material and carton in the event reship-  
ping is necessary.  
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TABLE OF CONTENTS  
Page  
Chapter 1 Point Level Model Description . . . . . . . . . . . . . . . . . . . . . . .4  
Chapter 2 Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Chapter 3  
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7  
Chapter 4 System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .8-10  
Chapter 5 Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12  
Chapter 6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13  
3
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SYSTEM DESCRIPTIONS  
1
GENERAL DESCRIPTION  
This Series of Liquid Level Detection systems are ideal, low cost ultrasonic  
liquid level detection systems for many applications. They operate in a broad  
spectrum of viscous to light liquids.  
It uses proven ultrasonic technology with a sensor fabricated completely from  
316 Stainless Steel, which allows it to operate in virtually any liquid.  
Sensitivity adjustment allows the monitoring of percentage solids in the contents  
of the liquid. Its small size standard 3/4” NPT mounting fitting, and ability to be  
installed vertically or horizontally makes it the perfect choice for new or existing  
applications.  
MODEL FUNCTION  
TYPE  
INPUT  
OUTPUT  
AGENCY  
APPROVAL  
LVU-230  
Standard Point  
Level Gap Sensor  
Loop Power Point  
Leve Gap Sensor  
Integral  
& Remote  
Integral  
115VAC/230VAC  
24VDC/12VDC  
9VDC to 30VDC  
10A DPDT  
CE  
LVU-260  
Two Wire  
4-20mA  
CE  
4-20mA  
LVUC10  
Cryogenic Temp  
Liquid Level Sensor  
Integral  
(-100˚C)  
Remote  
(-300˚C)  
115VAC/230VAC  
24VDC/12VDC  
10A DPDT  
Two Wire,  
4-20mA  
CE  
4
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PRINCIPLES OF OPERATION  
2
The Level switches operates using ultrasonic sound wave propagation. Ultrasonic  
sound waves are greatly attenuated when transmitted through air. Conversely,  
when liquid is present, transmission of the sound waves is greatly enhanced. The  
electronic control unit, either integral or remote to the sensor, generates electrical  
signals that are converted to bursts of ultrasonic energy at the sensor. The ultra-  
sonic bursts are transmitted across the liquid sensing gap of the sensor. Upon  
receipt of a valid signal at the receiver, the solid state electronics generate a “data  
enable” condition indicating liquid is present. This signal energizes a relay and\or  
provides an output condition.  
INSTALLATION  
3
GENERAL  
All units are easy to install. A sensor with an integral electronic control unit or a  
sensor with a remote control unit can be mounted in any position or orientation  
desired.  
Make sure that all wiring, conduit and electrical fittings conform to local electrical  
codes for the location selected.  
VISUAL INSPECTION  
Unpack the control unit and sensor assemblies. Visually inspect them for any  
damage. Advise Cosense immediately if either assembly is damaged.  
PRELIMINARY OPERATIONAL CHECK  
Before installing the unit, a simple operational checkout should be performed as  
follows:  
WARNING: In a hazardous environment never open the housing cover or con-  
nect the power leads without first disconnecting the electrical power at its  
source.  
1. Fill a container with liquid.  
2. Open the control unit housing cover and connect the power to the control unit  
(see appropriate wiring diagram for your unit).  
3. Apply power from the source.  
4. Place the sensor in the liquid. The relay should energize, or output will switch  
to 20.0±1.0mA.  
5. Remove the sensor from the liquid. The relay will de-energize or output will  
switch back to 4.0±1.0mA indicating that the system is functioning properly.  
If you do not experience the results indicated in Steps 4 and 5, contact  
Cosense immediately.  
6. Disconnect the power to the control unit.  
7. Proceed to final installation.  
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FINAL INSTALLATION  
3
CONTACT MODELS  
Follow the instructions below:  
1. Drill a suitable hole in the vessel or pipe wall and tap for 3/4” NPT. If this  
walled vessel or material is not suitable for threading, weld or braze a bush-  
ing to accept the sensor.  
2. Screw the sensor in the threaded section and make sure that there is a good  
seal. Use a pipe compound or sealing tape compatible with the materials and  
avoid excessive tightening.  
3. Run the power and control wiring cable to the electronic control unit.  
Observing all applicable electrical codes and proper wiring procedures.  
CONTROL UNIT  
Refer to the typical installation diagram and control unit dimensions when  
installing the control unit. Follow steps 1 and 2 below for remote mounted elec-  
tronic units. Steps 3 through 7 are common for both the integral electronic units  
and remote electronic units.  
1. Mount the remote control unit on any suitable wall, panel, etc. making sure  
there is adequate clearance for wiring.  
2. Remove the PC board by removing the screws. Drill a suitable size hole in the  
control unit housing for a conduit fitting (if so required).  
3. Remove the cover from housing. To complete wiring, either leave or remove  
the electronics printed circuit board in the housing on remote units and  
remove the encapsulate electronics in integral units.  
CAUTION: Never remove unit from a vessel with power and/ or output  
control cables connected to the electronic control unit inside the housing  
to avoid cable damage.  
4. Wire the unit as desired. Refer to the wiring diagram inside the cover.  
Note: All wiring, conduit and fittings should conform to local electrical  
codes. In a hazardous location, a conduit seal should be installed within  
18 inches of the control unit housing. Use a drain seal in vertical conduit  
run to prevent condensation from entering the control unit. OMEGA  
assumes no responsibility for improperly wired units.  
5. Replace the printed circuit board, if removed, or the encapsulated electronics.  
Make certain that the wires are dressed carefully to prevent pinching between  
the cover and the housing.  
6. Replace the housing cover.  
For Ultrasonic Point Level Switches  
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FINAL INSTALLATION  
3
CALIBRATION PROCEDURE  
(IF REQUIRED, OTHERWISE DO NOT ADJUST THE POTENTIOMETER -  
LVUC10)  
After the installation is complete, the system must be calibrated for the proper  
operation.  
1. Connect the sensor cable to electronics at Jacks J1 and J2.  
2. Connect power as per wiring diagram.  
3. Turn the power on.  
4. Allow the liquid or sludge to rise above the sensing point, adjust the poten-  
tiometer clockwise, until the relay is energized or output will switch to  
20.0+1.0 mA. Turn the potentiometer one more turn clockwise.  
5. Allow the liquid or sludge to fall below the sensing point, relay should be de-  
energized or output will switch back to 4.0+1.0 mA. If not, turn the poten-  
tiometer counter clockwise until the relay is de-energized. Turn the poten-  
tiometer counter clockwise one half turn.  
6. Repeat Steps 4 and 5 for a final adjustment.  
8. Unit is now calibrated. When the liquid level is above the sensing point, the  
relay will be energized or output will switch to 20.0±1.0 mA. When the liq-  
uid level is below the sensing point, the relay will be de-energized or output  
will switch back to 4.0±1.0 mA.  
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SYSTEM WIRING DIAGRAM  
4
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SYSTEM WIRING DIAGRAM  
4
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SYSTEM WIRING DIAGRAM  
4
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DIMENSIONAL DRAWINGS  
5
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DIMENSIONAL DRAWINGS  
5
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MAINTENANCE  
6
PREVENTATIVE MAINTENANCE  
Electronics are constructed with solid state components and are epoxy encapsu-  
lated. Periodically check and clean the sensor when used with liquids which  
cause a coating build up on the sensor. No other maintenance is required.  
CLEANING  
If the pipe or vessel to which the unit is mounted is to be steam cleaned or  
cleaned with abrasive detergents, remove the entire unit before cleaning by:  
1. Disconnecting the power at the source.  
2. Opening the housing cover.  
3. Removing the power and control wiring cable.  
4. Unthreading the sensor.  
To reinstall, follow the installation procedures.  
SYSTEM MALFUNCTION  
Should the system malfunction, notify Omega immediately.  
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WARRANTY/DISCLAIMER  
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a  
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month  
grace period to the normal one (1) year product warranty to cover handling and shipping time. This  
ensures that OMEGA’s customers receive maximum coverage on each product.  
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service  
Department will issue an Authorized Return (AR) number immediately upon phone or written request.  
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no  
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,  
including but not limited to mishandling, improper interfacing, operation outside of design limits,  
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of  
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;  
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating  
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not  
limited to contact points, fuses, and triacs.  
OMEGA is pleased to offer suggestions on the use of its various products. However,  
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any  
damages that result from the use of its products in accordance with information provided by  
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the  
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR  
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF  
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY  
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF  
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of  
OMEGA with respect to this order, whether based on contract, warranty, negligence,  
indemnification, strict liability or otherwise, shall not exceed the purchase price of the  
component upon which liability is based. In no event shall OMEGA be liable for  
consequential, incidental or special damages.  
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic  
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical  
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or  
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility  
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify  
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the  
Product(s) in such a manner.  
RETURN REQUESTS/INQUIRIES  
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE  
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN  
(AR) NUMBER FROM OMEGAS CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID  
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return  
package and on any correspondence.  
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent  
breakage in transit.  
FOR WARRANTY RETURNS, please have the  
following information available BEFORE  
contacting OMEGA:  
FOR NON-WARRANTY REPAIRS, consult OMEGA  
for current repair charges. Have the following  
information available BEFORE contacting OMEGA:  
1. Purchase Order number under which the product  
was PURCHASED,  
1. Purchase Order number to cover the COST  
of the repair,  
2. Model and serial number of the product under  
warranty, and  
3. Repair instructions and/or specific problems  
relative to the product.  
2. Model and serial number of the product, and  
3. Repair instructions and/or specific problems  
relative to the product.  
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords  
our customers the latest in technology and engineering.  
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.  
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,  
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the  
prior written consent of OMEGA ENGINEERING, INC.  
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Where Do I Find Everything I Need for  
Process Measurement and Control?  
OMEGA…Of Course!  
Shop online at omega.com  
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Wire: Thermocouple, RTD & Thermistor  
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pH, Conductivity & Dissolved Oxygen Instruments  
M-4204/1005  
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