Omega Engineering LVUN-600 Manual de usuario

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LVUN-600

Non-invasive Ultrasonic Point Level Switches

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User’s Guide

SE-60X-Series-new! 2/25/02 10:19 AM Page 1

Servicing North America:

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

ISO 9001 Certified Stamford, CT 06907-0047

TEL: (203) 359-1660 FAX: (203) 359-7700

e-mail: [email protected]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada

TEL: (514) 856-6928 FAX: (514) 856-6886

e-mail: [email protected]

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: (001) 203-359-7803 e-mail: [email protected]

FAX: (001) 203-359-7807 [email protected]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: +31 (0)20 3472121 FAX: +31 (0)20 6434643

Toll Free in Benelux: 0800 0993344

e-mail: [email protected]

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

TEL: +420 (0)59 6311899 FAX: +420 (0)59 6311114

Toll Free: 0800-1-66342 e-mail: [email protected]

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

TEL: +33 (0)1 61 37 2900 FAX: +33 (0)1 30 57 5427

Toll Free in France: 0800 466 342

e-mail: [email protected]

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

TEL: +49 (0)7056 9398-0 FAX: +49 (0)7056 9398-29

Toll Free in Germany: 0800 639 7678

e-mail: [email protected]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom

TEL: +44 (0)161 777 6611 FAX: +44 (0)161 777 6622

Toll Free in United Kingdom: 0800-488-488

e-mail: [email protected]

OMEGAnet®Online Service Internet e-mail

omega.com [email protected]

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

For Ultrasonic Point Level Switches LVUN-600 Series

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.

TABLE OF CONTENTS

For Ultrasonic Point Level Switches LVUN-600Series

Page

Chapter 1 Point Level Model Description . . . . . . . . . . . . . . . . . . . . . . . . . .4

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

Chapter 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7

Chapter 4 System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9

Chapter 5 Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11

SYSTEM DESCRIPTIONS

PRINCIPLES OF OPERATION

The LVUN-600 Series 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

provides an output condition.

PRINCIPLES OF OPERATION 2

GENERAL DESCRIPTION

The LVUN-600 Series Liquid Level Detection system is an ideal, low cost ultrasonic

liquid level detection system for many applications. It operates in a broad spec-

trum of viscous to light liquids.

For Ultrasonic Point Level Switches LVUN-600 Series

INSTALLATION

For Ultrasonic Point Level Switches LVUN-600Series

GENERAL INSTALLATION

All units are easy to install. The sensor with its remote electronic 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 wiring diagram).

3. Apply power from the source.

4. Place the sensor in the liquid. The relay should energize.

5. Remove the sensor from the liquid. The relay will de-energize indicating that

the system is functioning properly.

6. Disconnect the power to the control unit.

7. Proceed to final installation.

NON-INVASIVE / CLAMP-ON TIME

Refer to the typical installation diagram and follow the instructions below.

1. Clean the mounting surface of the pipe or vessel.

2. Coat the sensor faces and the area on the pipe or vessel where sensors are to

be mounted liberally with coupling compound (silicone grease or heat sink

compound).

3. Clamp the sensor assembly on the pipe or vessel. Tighten the clamp assembly

on the vessel until the sensor assembly is firmly mounted against the sensor

wall. Do not over tighten.

4. Run the cable to the control unit assembly.

INSTALLATION

For Ultrasonic Point Level Switches LVUN-600 Series

CONTROL UNIT

Refer to the typical installation diagram and control unit dimensions when

installing the control unit.

CALIBRATION PROCEDURE

After the installation is complete, the system must be calibrated for proper opera-

tion.

1. Connect the sensor cable to electronics as shown in wiring diagram.

2. Connect power as per wiring diagram.

3. Turn the power on.

4. Allow the liquid to rise above the sensing point until the relay is energized.

5. Allow the liquid to fall below the sensing point, relay should de-energized.

6. Repeat steps 4 and 5.

7. Unit is now calibrated. When the liquid level is above the sensing point, the

relay will be energized. When the liquid level is below the sensing point,

the relay will be de-energized.

MAINTENANCE

PREVENTIVE MAINTENANCE

Electronics are constructed with solid state components.

Periodically, check and clean the sensor(s) when used with

liquids which cause a coating to build up on the sensor. No

other maintenance is required.

CLEANING

If the pipe or vessel to which the sensor is mounted is to be steam cleaned or

cleaned with abrasive detergents, remove the entire unit before cleaning by:

1. Disconnecting the power at source.

2. Opening the housing cover.

INSTALLATION

SYSTEM MALFUNCTION

Should the system malfunction, notify OMEGA immediately

For Ultrasonic Point Level Switches LVUN-600 Series

3. Removing power and control wiring cables.

4. Unthreading the sensor.

To reinstall, follow Installation Procedure

SYSTEM WIRING DIAGRAM

WIRING DIAGRAM

Two Channel

For Ultrasonic Point Level Switches LVUN-600 Series

SYSTEM WIRING DIAGRAM

For Ultrasonic Point Level Switches LVUN-600 Series

WIRING DIAGRAM

Multi Channel:

Four Channel:

Three Channel:

Tabla de contenidos

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