Omega TX33 User guide

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TX33

Loop-powered RTD Input In-head

Programmable Transmitter

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User’s Guide

MADE IN TAIWAN

Loop-powered RTD Input
In- Head Programmable Transmitter
Model TX33

Multi-ranges Selectable

Temperature Linearized

Low Temperature Drift

Easy Calibration

Competitive pricing

Descriptions

The Model TX33 is an analog, non-isolated, 2-wire head-mounted temperature transmitter that
converter the RTD input into a proportional, linear, and highly accurate 4- 20 mA output current
in a variety applications such as process control, automation system, and energy source
management.The TX33 is performed by means of a 6 dip-switch array for the coarse range
setting, and two multi-turn potentiometers (Zero & Span) which are used for the final fine-tuning.
The TX33 accepts low level signal from RTD, filtered, amplified, and converter to process
current to reduce susceptibility transients and noise operations and allow the same two wires to
carry the transmitter power and output current signal simultaneously.

Specifications

( Vloop = 24 Vdc, Tamb = 23 ± 2 deg C, Rload = 250 ohms)

Output: 4 - 20 mA; Upscale < 25 mA; Downscale < 3.0 mA
Loop power: 10 - 32 Vdc. Reverse polarity protected, LED on Indication
Input RTD: Pt100, 2 or 3- wire DIN. 43760, BS1904 characteristics
Max.sensor wire resistance: 30 ohm / wire
Supply voltage effect: ± 0.01 % of span /Volt
Temperature coefficient: ± 0.01 % of span / deg C (200 deg C measurement range)
Linearity error: ± 0.15% of span ± 0.1 deg C
Repeatability: ± 0.01 % of span
Load capability: 50 x (loop power - 10) ohms
Input zero range: -50 to 50 deg C , adjustable
Span: 50 to 200 deg C selectable; see table 1
Fine adjustment: 5 % of ZERO and SPAN
RFI effect (5W, 470 MHz): < ± 10% of span
Response time (0 to 90%): 200 ms
Housing material: Polycarbonate, UL94-V0 grade
Connection: M3 Screw, AWG 14 - 22
Operation environment: -40 to 85 deg C; 5 to 85 %, non-condensing
Dimensions: 45mm Dia. X 20 mm H
Weight: 35 g

Omega Engineering Inc

Adjustments

Connect signal source (calibrator) to the unit, power on warm up 5 minutes or more.

1. Set the calibrator to the desired low temperature (4 mA point) and adjust the potentiometer
ZERO to get Iout = 4 mA.

2. Set the calibrator to the desired high temperature (20 mA point) and adjust the potentiometer
SPAN to get Iout = 20 mA.

3. Repeats steps 1 & 2 once, if necessary for best accuracy

< Table 1> span setting

Note:

1. For 2-wire RTD input Terminal # 2 & # 3 must be shorten together.

2. When change the span by DIP-switch setting, the transmitter should be calibrated
again for best accuracy.

3. Without specified, the unit is calibrated 200 ¢J before shipping.

Dimensions: mm (inch)

Wiring Connections

H = 20

Measurement Range

Note:

The DIP-switch is protected by a small tip which
has to be moved before setting
S1 = ON Position, ZERO Range: -50 ~ 0 Deg. C
S1 = OFF Position, ZERO Range: 0 ~ +50 Deg. C

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. WARN-
ING: These products are not designed for use in, and should not be used for, human applications.

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’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 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; 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.

Servicing North America:

U.S.A.: One Omega Drive, Box 4047

ISO 9001 Certified Stamford, CT 06907-0047

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

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
Tel: [phone]
FAX: [phone]
e-mail: [email protected]

For immediate technical or application assistance:

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

®

Mexico: En Espan˜ol: [phone]-7803

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

OMEGAnet®Online Service Internet e-mail

omega.com [email protected]

Servicing Europe:

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

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

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

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

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

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

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. 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.

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 2007 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.

M4412/0107