Omega Products TX92 Installation Manual

TX92

RTD Temperature Transmitter

FM

APPROVED

www.omega.com

e-mail: [e-mail]

User’s Guide

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Servicing

North America:

USA:

ISO 9001 Certified

One Omega Drive, Box 4047
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:

USA and Canada:

Sales Service: 1-800-826-6342 /1-800-TC-OMEGA

®

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

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

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TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico:

En Espan~ol: [phone]-7803
FAX: [phone]
e-mail: [e-mail]

[e-mail]

OMEGAnet®On-Line Service Internet e-mail

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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. The 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 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; or 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 written. 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 WHATSOEVER, EXPRESS 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.

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 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:

Postbus 8034, 1180 LAAmstelveen
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]

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 2003 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.

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.

Servicing Europe:

FOR WARRANTY 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.

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 82 66342
e-mail: [e-mail]

United Kingdom: ISO 9002 Certified

One Omega Drive
River Bend Technology Centre
Northbank, Irlam, Manchester
M44 5BD, United Kingdom
Tel: [phone]
FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

TX92
Miniature Two-Wire RTD Transmitter

Page

Section 1 Introduction 1

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

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Models Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Section 2 Unpacking Instructions 6
Section 3 Installation 8

3.1 Mounting the TX92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Wiring the TX92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TABLE OF

CONTENTS

i

TX92
Miniature Two-Wire RTD Transmitter

Page

Section 4 Calibration Instructions 15

4.1 Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.2 Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Section 5 Troubleshooting Guide 20
Section 6 Accessories 22
Section 7 Specifications 23
Appendix A

Intrinsically Safe Interconnection Diagram . . . . . . . . . . . . . . . . . . . . . 25

TABLE OF

CONTENTS

ii

1

1

Introduction

1.1 General Description

The Omega®TX90 Series Temperature Transmitters consist of the
TX91 Miniature Two-Wire Thermocouple Transmitter and the TX92
Miniature Two-Wire RTD Transmitter. This manual is written for the
TX92 RTD Transmitter.

The TX92 Two-Wire RTD Transmitter will produce a standard
4-20 mA output signal proportional to that produced by its RTD
input temperature sensor. Transmission of the proportional current
output may be accomplished by using copper wires. The TX92
RTD Transmitter accepts 100 Ohm, Platinum RTD sensors (PT100,
alpha=0.00385).

Figure 1-1. Photo of TX90 Series Transmitter
Figure 1-2. General Dimensions (in inches)

12

Introduction 1

(For Mounting)

3

1 Introduction

The TX92 transmitter is normally powered by an unregulated DC
power supply as shown in Figure 1-3. The proportionally-transmitted
signal begins at 4 mA, at the low end of its temperature range, and
increases to 20 mA, at the high end of its temperature range. (There
are various temperature ranges available for the TX92 transmitter. To
order, refer to Section 1.3 Table 1.1 for correct Model Numbers and
Range Codes.)

Figure 1-3. TX92 RTD Transmitter

Input

Output

04

Introduction 1

The TX92 two-wire transmitter will work with 2-wire or 3-wire RTDs
and provides an output current of 4-20 mA proportional to the RTD
sensor. When the transmitter is mounted inside a protection head
(such as the OMEGA NB1 Protection Head) two copper wires now
carry the temperature signal and DC voltage to operate the
transmitter, thereby reducing possible noise pick-up errors. The TX92
does NOT provide isolation between its input and the 4-20 mA
output. Note, however, that the RTD element is electrically insulated.

The TX92 is FM Approved when wired with the proper intrinsic
safety barriers. (See Intrinsically Safe Interconnection Diagram –
Appendix A.)