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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 trademark of OMEGA ENGINEERING, INC.
© Copyright 2017 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.

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.

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.

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.

Содержание TX94A

Страница 1: ...e mail info omega com For latest product manuals www omegamanual info TX94A Ultra Miniature Temperature Transmitters TM Shop online at omega com User sGuide ...

Страница 2: ...specifications without notice omega com info omega com Servicing North America U S A Omega Engineering Inc Headquarters Toll Free 1 800 826 6342 USA Canada only Customer Service 1 800 622 2378 USA Canada only Engineering Service 1 800 872 9436 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide ...

Страница 3: ...ns 1 1 3 General Description 2 1 4 Features 2 1 5 Models Available 3 Section 2 Installation 2 1 Mounting 4 2 2 Wiring 5 Section 3 Calibration Instructions 3 1 Equipment Required 6 3 2 Set up of Equipment 6 3 3 Calibration Procedures 7 Section 4 Troubleshooting Guide 8 Section 5 Specifications 9 ...

Страница 4: ... 2 Figure 2 1 Assembly inside a Protection Head 4 Figure 2 2 Wiring Diagram for RTD Transmitter 5 Figure 3 1 Transmitter Calibration Set Up 7 Figure 5 1 Dimensions 9 Table 1 1 Range Code 3 Table 1 2 Model Numbers 3 Table 3 1 Calibration Values 7 ...

Страница 5: ... expose the transmitter to rain or condensing moisture Do not operate the transmitter in flammable or explosive atmosphere As with any electronic instrument you may encounter high voltage exposure when installing calibrating or removing parts of the transmitter EMC Considerations Whenever EMC is an issue always use shielded cables Never run signal and power wires in the same conduit Use signal wir...

Страница 6: ...ransmitter The transmitter works with 2 or 3 wire RTDs and provides an output current of 4 20mA proportional to the RTD Sensor When the transmitter is mounted inside a protection head see Figure 2 1 two copper wires now carry the temperature signal and dc voltage to operate the transmitter thereby reducing possible noise pick up errors The transmitter does NOT provide isolation between its input a...

Страница 7: ... 120 F 40 to 49 C 1 0 to 200 F 18 to 93 C 2 0 to 300 F 18 to 149 C 3 0 to 500 F 18 to 260 C 4 0 to 750 F 18 to 399 C 5 0 to 1000 F 18 to 538 C 6 Table 1 2 Model Numbers Model Number Description TX94A RTD Transmitter 100 ohm Pt alpha 0 00385 Insert range code from Table 1 1 ...

Страница 8: ...ounting The transmitter may be 1 surface mounted 2 mounted inside a protection head shown in Figure 2 1 Figure 2 1 Assembly of the Transmitter inside an PR 14 Protection Head SECTION A A POWER LINES RTD WIRES ...

Страница 9: ...the PS and PS power terminals Note that the load usually a monitoring instrument may be connected to either the or power lead 2 Connect the RTD element to the IN and IN input terminals Figure 2 2 Wiring Diagram for RTD Transmitter 3 WIRE RTD RED BLACK RED BLACK JUMPER WIRE BLACK 2 WIRE RTD ...

Страница 10: ...s for the Z zero and S span adjustments that correspond to the model number For example for Model TX94A 2 the Z value is 92 95 ohms and the S value is 135 84 ohms If a Thermocouple RTD Simulator is used such as the Model CL511 Precision Calibrator select the Temperature Input Z zero and S span values 3 Set the Decade Box to the selected Z zero ohmic value Adjust the Z potentiometer to read 4 000 m...

Страница 11: ...el Alpha 0 00385 Zero Span TX94A Zero Span 40 120 F 1 84 27 119 01 0 200 F 2 92 95 135 84 0 300 F 3 92 95 156 94 0 500 F 4 92 95 197 69 0 750 F 5 92 95 246 69 0 1000 F 6 92 95 293 46 COPPER WIRE RTD CALIBRATOR CL511 DECADE RESISTANCE BOX EITHER OR ZERO SPAN With 250 Ohm Load dc Supply must be at least 12 35 Vdc DC SUPPLY 8 35 Vdc DMM 4 20 mA MONITOR 250 Ohms ...

Страница 12: ...on the power supply a Measure the total resistance of each device excluding the transmitter and power supply in the 20 mA loop including the resistance of the lead wires b Calculate maximum allowable loop resistance using the formula Loop Resistance maximum Vsupply 8 V 0 020A For example a 24V power supply would give a maximum loop resistance of 16 V 0 020A 800 ohms c Make sure the power supply is...

Страница 13: ...Range 25 Power Supply Voltage Operating Range 8 Vdc to 35 Vdc 28 mA max required per transmitter Accuracy 0 1 of full scale includes effects of hysteresis and repeatability Frequency Response 3dB 3Hz 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 0 93 23 6 MAX 0 52 13 2 0 480 12 19 0 480 12 19 0 156 3 96 for 6 32 SCREW 2 PLCS 0 250 6 35 1...

Страница 14: ...an 4 20 mA dc Current Output Limits 3 to 28 mA typical Max Loop Resistance Vsupply 8V 0 020A ohms Load Resistance Effect 0 01 of span per 300 ohms change Power Supply Effect 0 002 of output span per volt Input Sensor 2 or 3 wire RTD Max Bridge Current 0 8 mA ...

Страница 15: ...GA 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 ...

Страница 16: ...rs M U Turbine Paddlewheel Systems M U Totalizers Batch Controllers pH CONDUCTIVITY M U pH Electrodes Testers Accessories M U Benchtop Laboratory Meters M U Controllers Calibrators Simulators Pumps M U Industrial pH Conductivity Equipment DATA ACQUISITION M U Communications Based Acquisition Systems M U Data Logging Systems M U Wireless Sensors Transmitters Receivers M U Signal Conditioners M U Da...

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