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TX94
User guide
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Omega TX94 User guide

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TX94
RTD Temperature Transmitter
omega.com
e-mail: [email protected]
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Benelux:
Managed by the United Kingdom Office Toll-Free: 0800 099 3344 TEL: +31 20 347 21 21 FAX: +31 20 643 46 43 e-mail: [email protected]
Czech Republic:
Frystatska 184, 733 01 Karviná, Czech Republic Toll-Free: 0800-1-66342 TEL: +420-59-6311899 FAX: +420-59-6311114 e-mail: [email protected]
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 2010 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:
Managed by the United Kingdom Office Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00 FAX: +33 (0) 130 57 54 27 e-mail: [email protected]
Germany/Austria:
Daimlerstrasse 26 D-75392 Deckenpfronn, Germany Toll-Free: 0800 6397678 TEL: +49 (0) 7056 9398-0 FAX: +49 (0) 7056 9398-29 e-mail: [email protected]
United Kingdom: ISO 9001 Certified
OMEGA Engineering Ltd. One Omega Drive, River Bend Technology Centre, Northbank, Irlam, Manchester M44 5BD United Kingdom Toll-Free: 0800-488-488 TEL: +44 (0) 161 777-6611 FAX: +44 (0) 161 777-6622 e-mail: [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 mark to every appropriate device upon certification.
T
he 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.
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TX94 RTD Two-Wire Temperature Transmitter
Page
Section 1 Introduction 1
1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Models Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Section 2 Unpacking Instructions 9 Section 3 Installation 10
3.1 Mounting the TX94 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Wiring the TX94 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TABLE OF
CONTENTS
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1.1 General Description
The OMEGA®TX94 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 inexpensive copper wire. The TX94 RTD Transmitter accepts two-wire or three-wire Ohm Platinum RTD sensors (PT100, alpha = 0.00385).
01
1
Introduction
.
NOTE
Older units only accept two wire RTD’s. See wiring diagram on label on actual unit.
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Introduction 1
The TX94 transmitter is normally powered by an unregulated power supply as shown in Figure 1-3. The proportionally­transmitted 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 TX94 transmitter. To order, refer to Section 1.3 for correct Model Numbers and Range Codes.)
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Introduction 1
05
The TX94 two-wire transmitter works 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 TX94 does NOT provide isolation between its input and the 4-20 mA output. Note, however, that the RTD element is electrically insulated.
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Introduction 1
1.3 Models Available
07
RANGE RTD
-40 to 120
°F 01
0 to 200
°F 02
0 to 300
°F 03
0 to 500
°F 04
0 to 750
°F 05
0 to 1000
°F 06
RANGE RTD
50/85
°F71
0/100
°F72
20/120
°F73
0/150
°D74
0/200
°C75
30/100
°F76
Table 1-1. Range Code
INPUT TYPES
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Remove the Packing List and verify that you have received all equipment, including:
• TX94 RTD Two-Wire Temperature Transmitter
• Operator’s Manual If you have any questions about the shipment, please call the 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 reshipment is necessary.
09
2
Unpacking Instructions
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Figure 3-4 shows a typical installation using the bracket and mounting track. Figure 3-5 shows the TX90-DIN adapter.
Figure 3-1 Assembly of the Transmitter inside an OMEGA NB1 Protection Head (Dimensions in inches)
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Installation 3
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Installation 3
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Figure 3-3 TX90-BR Mounting Bracket (Dimensions in inches)
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Installation 3
Figure 3-5 TX 90-DIN DIN Rail Mounting Adapter (Dimensions in inches)
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Installation 3
Figure 3-6 Wiring Diagram for the TX 94
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O N
NOTE
Older units may accept 2-wire RTDs only
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Calibration Instructions 4
4.2 Calibration Procedures (Refer to Figure 4-1)
Connect the calibration equipment according to Figure 4-1. Standard copper test leads are used with RTD instrumentation.
To check or adjust the calibration:
1. Locate the Z (zero) and S (span) potentiometers.
2. Select, from Table 4-1, the correct ohmic values for the Z (zero) and S (span) adjustments that correspond to the Model Number. For example, for Model TX94-2, the Z value is 93.04 ohms, and the S value is 135.97 ohms.
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Calibration Instructions 4
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Figure 4-1 TX94 RTD Calibration Set-Up
NOTE
Older units may accept 2-wire RTDs only
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Troubleshooting Guide
Malfunction or incorrect operation may be caused by:
1. Incorrect Readings:
Check for improper wiring (Refer to Figure 3-6)
2. Loose or broken wires:
Check each terminal connection for tightness. Move each wire
back and forth and note any changes in operation.
3. Too high a load resistance in the output current loop or too low a current rating on the power supply:
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Accessories
Model No. Description
TX90-BR Mounting Bracket PSU-24B Unregulated Power Supply, 24 Volts TX828 Process Loop-Powered Indicator RT 48" Mounting Track TX90-DIN DIN Rail Mounting Adapter RAIL -35-2 6.5' Section 35mm DIN Rail
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Specifications 7
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Frequency Response: 2dB@ 3Hz Ambient Temperature: -13°F to 185°F (-25°C to 85°C) Storage Temperature
Range: -85°F to 257°F (-65°C to 125°C) Thermal Zero Shift: <0.01%/°F of span (span >10 mV)
<0.02%/°F of span (4-10 mV span) Thermal Span Shift: <0.01%/°F of span Weight: 1.0 oz (28g)
Output
Current Output Span: 4-20 mA dc
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7
Notes
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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 in which wear is not warranted, include but are 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 the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED 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.
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