Omega Products OS681 Installation Manual

Battery Installation

The OS681 requires a standard 9-volt battery.
The sensor only requires power during operation; there­fore, t he battery should last several months with aver ­age use.

Low Battery Indication

A decimal point to the right of the center digit indicates
low battery power.

Subzero Measurements

A decimal point to the left of the center digit indicates a
subzero temperature reading.

Lens Cleaning

Debris on the lens may cause obstruction and reduc e
the accuracy of the OS681. If this occurs, either wipe
the lens with a Q-tip (moistened with water only) or
blow off the loose particles with clean compressed air.

Specifications for OS681 Series:

Temperature

0 to 600°F (-18° to 315°C) or

Range: -67 to 260°F (-55° to 125°C)

Resolution: 1°F (1°C)

Accuracy: ± 2% of reading or 3°F (2°C),

± 1 digit, whichever is greater

Response
Time:

Target S

1 second

ize/ 3:1 optics ratio with a 1"

Field of View : minimum target

Repeatability: ± 0.5% of reading, plus one digit

Power Source: 9-volt battery included

Wavelength:

8 to 14 micron

Operating
Temperature:

50° to 125°F (10° to 52°C)

Dimensions: 7.26" x 1 .7" x 0.75"

Weight:

2.7 oz., 75 grams (w/o battery)

Emissivity: Fixed at 0 .95

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 malfuncti ons, it mu st be retur ned t o the fact ory fo r eva luation.
OMEGA’s Customer Service Department will issue an Authorized Return (AR)
number immedia tely upo n phone or written
OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does no t apply to d efects res ulting fro m any
action of the purch aser, inc luding b ut not limited to mi shandling, imprope
interfacing, operation outside of design limits, improper repair, or unauthorize
modification . This WARRANTY is
been tampered with or shows evidence of having been damaged as a result of
excessive corrosion; or current, heat, moisture or vibration; improper specifica-

WARRANTY/DISCLAIMER

request . Upon examinat ion by

VOID if the unit shows evidenc e of having

tion; misapplication; misuse or other operating conditions outside of OMEGA’s
control. Components in which wear is not warranted, include but are not limite
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 ass umes liability for any damages that result from the use of it
products in accordance with information provided by
or written. OMEGA warrants only that the parts manufactured by th

will be as specified and free of defects. OMEGA MAKES NO

compamy
OTHER WARRANTIES OR REPRESENTATIONS OF ANY
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIE
WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FO R A PA RTICULA R PU RPOSE ARE HER EBY DISCLA IMED
LIMITATION OF
exclusive, and the total liability of OMEGA with respect to this order,
whether
liability or otherwise, shall not exceed the purchase price of the
upon which liability is based. In no event shall OMEGA be liable fo
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
nuclear installation or activity; or (2) in medical
Should any Product( s) be used in or with any nucl ear installation or a ctivity,
medical
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.

Dire ct al l war ranty and repair reques ts/inqu iries to t he OM EGA C ustomer
Serv ice
PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM
OM EGA’ S CUS TOM ER SER VIC E
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 prope
packaging to prevent breakage in transit.

FOR WARRANT
have the following information
available BEFORE contacting OMEGA

1. Purchase Order number unde
which the product wa
PURCHASED

2. Model and serial number of the
product under warranty, an

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

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© Copyright 2008 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

LIABILITY: The remedies of purchaser set forth herein are

based on contract, warranty, negligence, indemnification, strict

Component” under 10 CFR 21 (NRC), used in or with any

application, used on humans, or misused in any way, OMEGA assumes

applications or used on humans.

RETURN REQUESTS / INQUIRIES

Depa rtment. BEFOR E RE TURNING ANY PRODU CT(S) TO O MEGA,

Y RETURNS, please

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,

DE PART MEN T (IN OR DER T O A VOI D

FOR NON-WARRANTY REPAIRS,
consult OMEGA for current repair

:

charges. Have the following information
available BEFORE contacting OMEGA:

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1. Purchase Order number to cover th
COST of the repair,

2. Model and serial number of th

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product, and

3.

Repair instructions and/or specific
problems relative to the product.

.

OMEGA, either verbal

KIND WHATSOEVER,

component

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OMEGAnet®Online Service Internet e-mail

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U.S.A.:

ISO 9001 Certified Stamford, CT 06907-0047

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Canada: 976 Bergar

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

,

Mexico: En Espan˜ol: [phone]-7803

Czech Republic: Frystatska 184, 733 01 Karvina´, Czech Republic

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

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United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

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 Ne
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.

omega.com info@omeg a.com

Servicing North America:

One Omega Drive, Box 4047

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

Laval (Quebec) H7L 5A1, Canad
Tel: [phone]
FAX: [phone]
e-mail: info@omega.c

For immediate technical or application assistance:

Customer Service: 1-800-622-2378/1-800-622-BEST
Engineering Service: 1-800-872-9436/1-800-USA-WHEN

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

Servicing Europe:

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

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

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

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OS681

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TEMPERATURE

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

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Wire: Thermocouple, RTD & Thermisto

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M2550/0608

Introduction

Every object in t he universe radiates energy in the
infrared spectrum. Infrared energy falls between visible
light and radio waves in t he electromagnetic spectrum,
which includes ultraviolet, gamma and x-rays.

Infrared temperature measurement technology is not
new . It has been used successfully in aerospace labora­tories as well as manufacturing, maintenance and qual ­ity control processes for more than 30 years.

The OS681 Series

The OS681 is a hand -held, battery-operated sensor
that safely and accurately measures temperature using
a non contact infrared technology. Operation of the
OS681 is simple.
Just point the sensor at the desired target and press the
"on" button for a temperature reading no contact is ever

needed. The OS681 has the first temperature response
time of 1 second and a continuous reading feature,
which is achieved by holding down the "on" button. The
temperature reading is held on the display for 60 sec­onds after the release of the "on" button.

The Infrared Syste m

Infrared sensors consist of optics, detector, display and
output. The O S681

uses special o ptics to gather
infrared energy from a target surface and focuses this
energy onto a custom detector. The detector then con­verts the infrared energy into an electrical signal pro­portionate to the temperature of the target surface
being measured. The output is a digital temperature
measurement in degrees Fahrenheit or Centigrade
within milliseconds.

Calculating Distance

The OS681 has a distance-to-target ratio (D/T) of 3:1
and measures the emitted energy of a target one-third
the size of t he working distance.
For example, if the distance is 3 inches, the diameter of
the measured area is 1 inch.

Precautions

nsure accurate temperature readings, it is impor-

To e
tant to prevent contact or near contact of the sensin g
lens to extreme hot or cold sources. Exposure of m ore
than a few seconds may cause the signal to drift sever ­al degrees.

Emissivity

Emissivity is a characteristic of a target surface and is
the relative ability of that surface to emit energy.

The OS681 is preset to an emittance value of 0.95-th e

value of most Organic substances. This includes such
things as wood, cloth, plastics and water. Highly reflec­tive materials with smooth polished surfaces have emit­tance values much lower than 1.0. To compensate for
emissivity when measuring such materials, we r ecom­mend using flat black paint or attaching black tape to
the target to soften the reflectiveness.

Laser Sight Option

The laser is l ocated on the front of the sensor next to the
optics and is activated by pressing the "on" button. Th e
laser will produce a red spot from sig hting the measured

target.

CE Certif ication

This instrument

conforms to t he following standards :
EN50081-1:1992, Electro magnetic Emissions
EN50082-1:1992, Electromagnetic Susceptibilit

y
Performance of the unit may degrade while in the pres­ence of these electromagnetic fiel ds.

AVOID EXPOSURE - LASER RADIATION

IS EMITTED FROM THIS APERATURE

C A U T I O N

LASER RADIATION - DO NOT STARE INTO BEAM

OUTPUT < 1mW WAVELENGTH 670 nm

CLASS II LASER PRODUCT

COMPLIES WITH 21 CFR 1040.10 and 1040.11

EXCEPT FOR DEVIATIONS PURSUANT TO

LASER NOTICE NO. 50 DATED JULY 6, 2001

CAUTION LABEL

Caution and apeture label located on the backside of the unit.

011-0011 REV B 3/07

Se ns or

Laser

Caut io n L abel

Di splay

Power On

Ba tter y
Compa rtment