Omega Products LVU-1502-LP Installation Manual

Millennium

Two / Four Wir e

User’s Guide

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LVU1500 Series

Ultrasonic Level Measurement Systems - Two / Four Wire

Servicing North America:

U.S.A.: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford, CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

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

®

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

®

Mexico: En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

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

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

omega.com [e-mail]

It is the policy of OMEGA Engineering, Inc. 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 accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

UNPACKING INSTRUCTIONS

2

UNPACKING INSTRUCTIONS

Remove the Packing List and verify that you have received all equipment, includ­ing the following (quantities in parentheses):

Ultrasonic Level Measurement System (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 reship­ping is necessary.

For Ultrasonic Continuous Level Two/Four Wire

TABLE OF CONTENTS

3

Chapter 1 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Chapter 2 Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Chapter 3 Installation

Control Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..5

Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..5

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Chapter 4 Programming Description

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Chapter 5 Calibration Diagram

Diagram #1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Diagram #2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Diagram #3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Diagram #4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Page

For Ultrasonic Continuous Level Two/Four Wire

SYSTEM DESCRIPTIONS

GENERAL DESCRIPTION

The Two / Four Wire Series Liquid Level systems are state-of-the-art
level measurement instruments. Based on the latest ultrasonic technology, the
LVU-1500 Series provide an ef ficient, r eliable and cost effective means of level
control.

The LVU-1500 Series consists of two major components, a non-contacting ultra­sonic sensor and a compact, integral electronic control.

The unit is available in a variety of sizes and materials to suit virtually any applica­tion. Standard mounting configurations include 3/4” and 2” NPT fittings. Flange
mounting is also available to meet user specifications. Sensor material construc­tion includes 316SS, Kynar or Teflon.

1

PRINCIPLES OF OPERATION

PRINCIPLES OF OPERATION

In operation, the electronics generate an electronic signal which is converted by
the sensor (mounted on the top of the vessel) to a burst of ultrasonic pulses.
These pulses are transmitted through the air towar d the liquid surface. As the
pulses reach the liquid sur face, they ar e r eflected back to the sensor. Those
received echoes are converted back to an electr onic signal which is then sent to
the microprocessor. The microprocessor uses the r eturn signals to calculate the
time it takes for the pulses to travel to the liquid surface and back. This “Time of
Flight” is directly proportional to the distance of the liquid surface from the sen­sor. The microprocessor then compares these calculated values with user pro­grammed system parameters to provide the requir ed control outputs.

2

For Ultrasonic Continuous Level Two/Four Wire

4

5

3

INST ALLATION

CONTROL UNIT INSTALLATION

1. Open the control unit enclosur e and r emove the printed cir cuit boar d.

2. Replace printed circuit boar d and r oute power and contr ol wiring to the enclo­sure. Observe all applicable local electrical codes and wiring procedur es.

3. Connect power and control wiring to the contr ol unit as shown in Wiring
Diagram (see figures 2 and 3).

4. Be sure that all wiring is car efully dr essed to pr event pinching between the
housing and the cover.

SENSOR INSTALLATION

The sensor is mounted on the top of the vessel with the sensor facing downward.
A clear path, free of any obstructions must be provided between the sensor and
the liquid surface. Due to the narr ow sensor beam patter n, vertical axis position­ing of the sensor is important. The sensor must be installed perpendicular to the
liquid surface.

1. For a sensor provided with an NPT threaded fitting, drill a suitable hole in the
vessel top and tap for the correct NPT thread. In thin walled vessels, or ves­sels constructed of material not suitable for tapping, weld or braze a bushing
to accept the sensor.

2. Screw the sensor into the threaded fitting being car eful not to cr oss thread the
sensor. When possible, the use of a pipe compound or sealing tape is recom­mended. AVOID OVER TIGHTENING!

3. For flange mounted sensors, simply bolt the sensor / flange assembly to the
proper mating flange connection.

4. Route the sensor cable to the electronic control unit and connect per the
Wiring Diagram (see figures 2 and 3). IF ROUTING THE SENSOR CABLE
THROUGH CONDUIT, A DEDICATED CONDUIT SHOUT BE UTILIZED. AVOID
ROUTING THE SENSOR CABLE IN CLOSE PROXIMITY TO ANY SOURCE OF
ALTERNATING CURRENT OR RFI.

CAUTION: DO NOT ATTEMPT TO REMOVE A THREADED SEN­SOR FROM THE VESSEL WITH THE CABLE ATTACHED TO THE
CONTROL UNIT, OTHERWISE IT MAY DAMAGE CABLE.

For Ultrasonic Continuous Level Two/Four Wire

INST ALLATION

6

WIRING

Note: All wiring between the power supply and the transmitter should be accom-

plished with 18 AWG to 22 AWG shielded twisted pair. The connection is
made at the terminal strip within the transmitter enclosur e. Befor e you con­nect the power line to the transmitter, be sure that the voltage identification
on the nameplate matches the power supply. DO NOT attempt to operate this
unit at voltages other than as identified or it will damage the unit.

CAUTION:UNITS ARE DESIGNED TO OPERATE ON DC POWER ONLY.
APPLICATION OF 120 VAC WILL DAMAGE THE INSTRUMENT.

1. Make sure the power sour ce is turned off.

2. Pull power supply wires thr ough conduit connection.

3. Connect the positive supply wire to the (+) ter minal, and the negative supply
wire to the (-) ter minal. Refer to Wiring Diagram (Figur es 2 and 3).

4. Replace the transmitter housing cover until it is time to calibrate.

5. Connect the positive supply wire to the positive ter minal of the power source.

3

For Ultrasonic Continuous Level Two/Four Wire

4

GENERAL

The Two Wire and Four Wire units ar e calibrated via BCD switches. All
data entered during the calibration procedur e is stor ed in a nonvolatile memory
to prevent loss of data in the event of a power failure.

CALIBRATION PROCEDURE

Unscrew the control unit cover and use the following pr ocedures:

1. Dial ZERO setting though “top BCD switches” in incr ements of 1” up to 360”
(30 feet) (special units can be set to an increment of 0.1” up to a span of

99.9”) (e.g.: 12” can be set as 012 on BCD switches).

2. Dial SPAN setting through “bottom BCD Switches” in increments of 1” to 360”
(30 feet) (special units can be set to an increment of 0.1” up to a span of

99.9”) (e.g.: 12” can be set as 120 on BCD switches).

3. Set “JP1” jumper for height/distance mode
Height Mode: Zero Setting: 20mA

Distance Mode: Zero Setting: 4mA

4. Turn on the power, the unit is ready for operation.
While the cover is unscrewed, observe lost echo LED. If the unit has not

detected a reliable echo for over 10 seconds, the LED will tur n on and the unit
will draw approximately 22mA indicating an error condition.

PROGRAMMING DESCRIPTION

Span Setting: 4mA

Span Setting: 20mA

For Ultrasonic Continuous Level Two/Four Wire

7

CALIBRATION DIAGRAM

Figure 1

5

e

8

For Ultrasonic Continuous Level Two/Four Wire

Ordering System

4-WIRE

P/N LIQUID SLURRY BULK SOLID INPUT OUTPUT MATERIAL MOUNTING

LVU-1501 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated 316LSS 3/4” NPT
LVU-1502 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated 316LSS Sanitary 1”
LVU-1504 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated Teflon 3/4” NPT
LVU-1505 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated Teflon Sanitary 1”
LVU-1506 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated Tefzel 3/4” NPT
LVU-1508 12” - 300” (.3M - 7.6M) 12” - 150” (.3M - 3.8M) 4 Wire, 24VDC 4-20MA, Isolated 316LSS 2” NPT
LVU-1507 12” - 300” (.3M - 7.6M) 12” - 150” (.3M - 3.8M) 4 Wire, 24VDC 4-20MA, Isolated Tefzel 2" NPT

RANGE RANGE SENSOR SENSOR

LOOP POWER

Ordering System

P/N LIQUID SLURRY BULK SOLID INPUT OUTPUT MATERIAL MOUNTING

LVU-1501-LP 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated 316LSS 3/4” NPT
LVU-1502-LP 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated 316LSS Sanitary 1”
LVU-1504-LP 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wir e, 24VDC 4-20MA, Isolated Teflon 3/4” NPT
LVU-1505-LP 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated Teflon Sanitary 1”
LVU-1506-LP 6” - 120” (.15M - 3M) 6” - 60” (.15M - 1.5M) 4 Wire, 24VDC 4-20MA, Isolated Tefzel 3/4” NPT
LVU-1508-LP 12” - 300” (.3M - 7.6M) 12” - 150” (.3M - 3.8M) 4 Wire, 24VDC 4-20MA, Isolated 316LSS 2” NPT
LVU-150-7LP 12” - 300” (.3M - 7.6M) 12” - 150” (.3M - 3.8M) 4 Wire, 24VDC 4-20MA, Isolated Tefzel 2" NPT

RANGE RANGE SENSOR SENSOR

For Ultrasonic Continuous Level Two/Four Wire

9

5

4 WIRE WIRING DIAGRAM

10

For Ultrasonic Continuous Level Two/Four Wire

2 WIRE WIRING DIAGRAM

5

For Ultrasonic Continuous Level Two/Four Wire

12

11

5

Figure 4

CALIBRATION DIAGRAM

For Ultrasonic Continuous Level Two/Four Wire

12

DIMENSIONAL DRAWING

5

For Ultrasonic Continuous Level Two/Four Wire

13

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 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 W

ARRANTY RETURNS, please have the

following information available BEFORE
contacting OMEGA:

1. Purchase Order 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. Purchase Order number to cover the COST

of the repair,

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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