Omega Products OMEGA-CJ Installation Manual

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User’s Guide

OMEGA®CJ

Thermocouple Cold-Junction Compensators

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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.

Benelux:

Managed by the United Kingdom Office
Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Czech Republic:

Frystatska 184, 733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

France:

Managed by the United Kingdom Office
Toll-Free: 0800 466 342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Servicing Europe:

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

®

U.S.A.: ISO 9001 Certified

OMEGA Engineering, Inc.
One Omega Drive, P.O. Box 4047
Stamford, CT 06907-0047 USA
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Servicing North America:

For immediate technical or application assistance:

Mexico:

En Español: 001 [phone]
FAX: [phone]
[e-mail]
e-mail: [e-mail]

Germany/Austria:

Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
Toll-Free: 0 800 6397678 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

United Kingdom:

ISO 9001 Certified

OMEGA Engineering Ltd.
One Omega Drive, River Bend Technology Centre
Northbank , Irlam, Manchester M44 5BD England
Toll-Free: 0800-488-488
TEL: [phone]
FAX: [phone]
e-mail: [e-mail]

Canada:

976 Bergar
Laval (Quebec), Canada H7L 5A1
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

i

SECTION PAGE

SECTION 1 INTRODUCTION .........................................................1

1.1 General Description .......................................................................1

1.2 Features ...........................................................................................1

SECTION 2 UNPACKING .................................................................2

SECTION 3 OPERATION ..................................................................2

3.1 Operating Procedure .....................................................................2

3.2 Battery Replacement ......................................................................4

3.2.1 Battery Life ......................................................................................4

3.2.2 Replacing the Battery ....................................................................4

SECTION 4 THEORY OF OPERATION .........................................5

SECTION 5 CALIBRATION ..............................................................7

SECTION 6 SPECIFICATIONS .........................................................8

TABLE OF

CONTENTS

OMEGA®CJ THERMOCOUPLE
Cold Junction Compensator

ii

NOTES

1

SECTION 1 INTRODUCTION

1.1 GENERAL DESCRIPTION

The OMEGA-CJ is a portable battery-powered automatic cold
junction compensator for use in thermocouple circuits. It provides
the physical and electrical equivalents of an ice bath reference
thermocouple at 0°C or 32°F.

Thermocouples can be plugged directly into the OMEGA-CJ. A
quick disconnect male plug and output jack with banana plugs are
provided for connecting the CJ to potentiometers as well as to
meters and recorders of high input impedance.

1.2 FEATURES

• High reliability - solid state circuitry with self contained battery

• Rugged construction

• Color coded thermocouple calibration

• Instantaneous warm-up

• High Stability - better than ± 0.2°C at any stabilized temperature
over its full +10° to 50°C range

• Extreme versatility - unit can be plugged directly into a
thermocouple or into a jack panel.

• Long battery life - 1500 hours or longer depending on
calibration.