Omega LVU-90 User Manual

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

TEMPERATURE

MU

Thermocouple, RTD & Thermistor Probes,
Connectors, Panels & Assemblies

MU

Wire: Thermocouple, RTD & Thermistor

MU

Calibrators & Ice Point References

MU

Recorders, Controllers & Process Monitors

MU

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

MU

Transducers & Strain Gauges

MU

Load Cells & Pressure Gauges

MU

Displacement Transducers

MU

Instrumentation & Accessories

FLOW/LEVEL

MU

Rotameters, Gas Mass Flowmeters & Flow Computers

MU

Air Velocity Indicators

MU

Turbine/Paddlewheel Systems

MU

Totalizers & Batch Controllers

pH/CONDUCTIVITY

MU

pH Electrodes, Testers & Accessories

MU

Benchtop/Laboratory Meters

MU

Controllers, Calibrators, Simulators & Pumps

MU

Industrial pH & Conductivity Equipment

DATA ACQUISITION

MU

Data Acquisition & Engineering Software

MU

Communications-Based Acquisition Systems

MU

Plug-in Cards for Apple, IBM & Compatibles

MU

Datalogging Systems

MU

Recorders, Printers & Plotters

HEATERS

MU

Heating Cable

MU

Cartridge & Strip Heaters

MU

Immersion & Band Heaters

MU

Flexible Heaters

MU

Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

MU

Metering & Control Instrumentation

MU

Refractometers

MU

Pumps & Tubing

MU

Air, Soil & Water Monitors

MU

Industrial Water & Wastewater Treatment

MU

pH, Conductivity & Dissolved Oxygen Instruments

M-3444 / 0799

http://www.omega.com

e-mail: [e-mail]

®

User ’s Guide

LVU-90 Series

Ultrasonic Level T ransmitter

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 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 should malfunction, 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 unautho-

rized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or

shows evidence of being 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 which wear are not warranted, including but 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 writ-

ten. OMEGA warrants only that the parts manufactured by it will be as specified and free of defects.

OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATS0EVER,

EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY

WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DIS-

CLAIMED. 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 spe-

cial 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, OMEGAassumes 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 OMEGA’S 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:

1. P.O. number under which the product

was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult

OMEGA for current repair charges. Have

the following information available

BEFORE contacting OMEGA:

1. P.O. number to cover the COST

of the repair,

2. Model and serial number of 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 1996 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 prior written consent of OMEGA ENGINEERING, INC.

USA

MADE

IN

Servicing North America:

USA: One Omega Drive, Box 4047

ISO 9001 Certified Stamford, CT 06907-0047

Tel: [phone] FAX: [phone]

e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1

Tel: [phone] FAX: [phone]

e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

SM

Customer Service: 1-800-622-2378 / 1-800-622-BEST

SM

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

SM

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico and

Latin America:

Tel: (95) 800-TC-OMEGA

SM

FAX: [phone]

En Espan˜ol: [phone] ext: 2203 e-mail: [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LAAmstelveen, The Netherlands

Tel: [phone] FAX: [phone]

Toll Free in Benelux: 06 0993344

e-mail: [e-mail]

Czech Republic: Ostravska 767, 733 01 Karvina

Tel: [phone] FAX: [phone]

e-mail: [e-mail]

France: 9, rue Denis Papin, 78190 Trappes

Tel: [phone] FAX: [phone]

Toll Free in France: 0800-4-06342

e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

Tel: [phone] FAX: [phone]

Toll Free in Germany: 0130 11 21 66

e-mail: [e-mail]

United Kingdom: 25 Swannington Road, P.O. Box 7, Omega Drive,

ISO 9002 Certified Broughton Astley, Leicestershire, Irlam, Manchester,

LE9 6TU, England M44 5EX, England

Tel: [phone] Tel: [phone]

FAX: [phone] FAX: [phone]

Toll Free in England: 0800-488-488

e-mail: [e-mail]

OMEGAnet

SM

On-Line Service Internet e-mail

http://www.omega.com [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly

pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every

appropriate device upon certification.

The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it con-

tains, and reserves the right to alter specifications without notice.

WARNING: These products are not designed for use in, and should not be used for, patient connected applications.

OMEGA

®

TM

omega.com

Step One

SPECIFICATIONS

Range: 3.6" to 6' (9 cm to 1.8 m)
Accuracy: ± .25% of span in air
Resolution: 0.125” (3 mm)
Frequency: 83 kHz (nominal)
Pulse rate: 2 pulses per second
Beam width: 8° conical
Dead band: 3.6” (9 cm)
Supply voltage: 12-36 VDC
Max loop resistance: 600 Ohms @ 36 VDC
Signal output: 4-20 mA, 12-36 VDC
Fail-safe diagnostics: Reverts to 22 mA

LED flashing

Temperature rating: F: -40º to 140º

C: -40º to 60º
Temp. compensation: Automatic over entire range
Pressure rating: 30 psi (2 bar) @ 25 °C., derated @ 1.667 psi

(0.113 bar) per °C. above 25 °C.
Enclosure rating: NEMA 4X / IP65
Enclosure material: Polypropylene, U.L. 94VO
Transducer materials: PVDF
Mounting threads: 3/4” NPT for LVU-91

3/4” G for LVU-92
Mounting gasket: Viton (3/4" G) LVU-92 only
Conduit connection: 1/2” NPT
CE compliance: EN 50082-2 immunity

EN 55011 emission

(pending)

About Ultrasonic Technology:

An ultrasonic sound wave is pulsed five times per second from the
base of the transducer. The sound wave reflects against the process
medium below and returns to the transducer. The microprocessor
based electronics measures the time of flight between the sound gen­eration and receipt, and translates this figure into the distance between
the transmitter and process medium below.

)

6’ Range

POWER

(-) (+)

GND

12-36 VDC

4-20 mA

Temperature/Pressure Derating

35
30
25
20
15
10
05

Operating Pressure (psi)

00

-40 -20 00 20 40 60

Acceptable

Range

Temperature (°C

Unacceptable

Range

Maximum Temperature/Voltage Derating

100

Ambient Sensor Temperature (°C)

Continuous 20 mA Curve

80
60
40
20

0

Unacceptable

Range

Acceptable

Range

12 16 20 24 28 32 36

Operating Voltage (VDC)

8° Cone

Range

Feet

Max. Series Resistance (Ohms)

Radius

Inches

1
2
3
4
5
6

1.2

2.1

2.9

3.7

4.9

5.4

700
600
500
400
300
200
100
000

Electrical Loading Limits

Unacceptable

Range

18 24 30 36

Supply Volyage (VDC)

Radius

Radius

cm

3.1

5.2

7.3

9.5

11.6

13.7

Acceptable

Range