Omega Products LVH-300 Installation Manual

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

TEMPERATURE

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

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Wire: Thermocouple, RTD & Thermistor

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Calibrators & Ice Point References

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Recorders, Controllers & Process Monitors

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Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

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Transducers & Strain Gauges

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Load Cells & Pressure Gauges

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Displacement Transducers

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Instrumentation & Accessories

FLOW/LEVEL

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Rotameters, Gas Mass Flowmeters & Flow Computers

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Air Velocity Indicators

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Turbine/Paddlewheel Systems

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Totalizers & Batch Controllers

pH/CONDUCTIVITY

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pH Electrodes, Testers & Accessories

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Benchtop/Laboratory Meters

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Controllers, Calibrators, Simulators & Pumps

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Industrial pH & Conductivity Equipment

DATA ACQUISITION

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Data Acquisition & Engineering Software

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Communications-Based Acquisition Systems

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Plug-in Cards for Apple, IBM & Compatibles

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Datalogging Systems

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Recorders, Printers & Plotters

HEATERS

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Heating Cable

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Cartridge & Strip Heaters

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Immersion & Band Heaters

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Flexible Heaters

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Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

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Metering & Control Instrumentation

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Refractometers

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Pumps & Tubing

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Air, Soil & Water Monitors

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Industrial Water & Wastewater Treatment

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pH, Conductivity & Dissolved Oxygen Instruments

M-1910 / 0702

http://www.omega.com

e-mail: [e-mail]

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User ’s Guide

LVH-300 Series

Horizontal Buoyancy Sensor

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.

®

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Step One

SPECIFICATIONS

Accuracy: ± 2 mm in water
Repeatability: ± 1 mm in water
Extreme orientation: ± 20° from horizontal
Specific gravity: .8 minimum
Switch type: Dry contact, SPDT
Switch voltage: Standard: 120 VAC, 120 VDC @ 15 VA

CE mark: 30 Vrms and 42.4 Vpeak or 60

VDC
Switch output: Selectable NO or NC states
Temperature range: F: -40° to 194°

C: -40° to 90°
Pressure range: 25 psi (2 bar) @ 25 °C., derated @ 1.667 psi

(.113 bar) per °C. above 25 °C.
Probe material: Polypropylene (PP)
Probe rating: NEMA 6 (IP68)
Mounting threads: 3/4" NPT
Mounting gasket: Viton (3/4”) metric only
Cable type: 8 ft. (2.5 m), 3-wire, 22 gauge with ground,

shield & PP jacket
CE compliance: EN 50082-2 immunity

EN 55011 emission

Technology

The horizontal buoyancy switch consists of a float, magnet, reed
switch and baffle body which dampens turbulence and eliminates the
negative effects of switch chatter. When the probe is dry, the float
rests on the bottom of the baffle body such that the magnet does not
influence the reed switch. As the probe becomes immersed in liquid,
the float becomes buoyant and the magnet elevates causing the reed
switch to change state.

General:

While a filter shroud protects the float from particulate contamina­tion, the switch may need to be cleaned periodically too prevent jam­ming or sticking. The vertical buoyancy and vertical float has no
scheduled maintenance requirement, except to clean off any deposits
or scaling from the switch as necessary. It is the responsibility of the
user to determine the appropriate maintenance schedule, based on the
specific characteristics of the application liquid.

Dimensions:

Cleaning procedure:

1. Power: Make sure that all power to the switch, controller and/or

power supply is completely disconnected.

2. Switch removal: If necessary, make sure that the tank is drained

well below the switch prior to removal. Carefully, remove the sen­sor from the installation. Remove the outer screen by pushing on
the screen and turning is slightly to disconnect is from the bayo­net connector so that the float is exposed.

3. Cleaning the switch: Using a soft bristle brush and mild deter-

gent, carefully wash the switch. Do not use harsh abrasives such
as steel wool or sandpaper, which might damage the surface of the
sensor. Do not use incompatible solvents which may damage the
sensor's PP or PVDF plastic body. Take particular care to remove
any scaling from the float body and make sure that it moves
freely.

4. Sensor installation: Follow the appropriate steps of installa-

tion as outlined in the Installation section of this manual.

Testing the installation:

1. Power: Turn on power to the controller and/or power supply.

2. Immersing the switch: Immerse the sensing tip in its applica-

tion liquid, by filling the tank up to the switches point of actua­tion. An alternate method of immersing the switch during prelim­inary testing is to hold a cup filled with application liquid up to
the switch's tip.

3. Test: With the switch being fluctuated between wet and dry

states, the switch indicator light in the controller should turn on
and off. If the controller doesn't have an input indicator, use a volt­meter or ammeter to ensure that the switch produces the correct
signal.

4. Point of actuation: Observe the point at which the rising or

falling fluid level causes the switch to change state, and adjust the
installation of the switch if necessary.