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Troubleshooting Guide

b) Calculate maximum allowable loop resistance using the

formula: Loop Resistance (maximum) = V

supply

–7V

For example, a 24V power supply would give a maximum loop

resistance of: 17V/0.020A = 850 ohms.

c) Make sure the power supply is rated for at least 28 mA

times the number of TX93 transmitters being powered. For
example, if the supply is powering five transmitters, the
supply should be rated for at least 140 mA.

0.020A

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Содержание TX93

Страница 1: ...TX93 Thermocouple Two Wire Temperature Transmitter omega com e mail info omega com For latest product manuals omegamanual info User sGuide Shop online at...

Страница 2: ...Toll Free 1 800 826 6342 TEL 514 856 6928 FAX 514 856 6886 e mail info omega ca For immediate technical or application assistance U S A and Canada Sales Service 1 800 826 6342 1 800 TC OMEGA Customer...

Страница 3: ...r 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 O...

Страница 4: ...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...

Страница 5: ...ction Page Section 1 Introduction 11 Section 2 Installation 11 2 1 Mounting the TX93 11 2 2 Wiring the TX93 17 Section 3 Calibration Instructions 19 3 1 Equipment Required 19 3 2 Set up of Equipment 2...

Страница 6: ...TX93 Thermocouple Two Wire Temperature Transmitter Section Page Section 4 Troubleshooting Guide 27 Section 5 Accessories 30 Section 6 Specifications 31 TABLE OF CONTENTS iii...

Страница 7: ...accepts thermocouple sensor types J K T or E and will produce a standard 4 20 mA output signal proportional to that produced by its attached input temperature sensor Transmission of the proportional c...

Страница 8: ...Introduction Figure 1 1 TX93 Transmitter Figure 1 2 Dimensions in inches 2 1...

Страница 9: ...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 ther...

Страница 10: ...Figure 1 3 TX93 Thermocouple Transmitter Introduction 4 1...

Страница 11: ...connect with only two cop per wire leads that will supply the voltage to operate the transmitter from a power supply and also carry the output current The output current is used for recording computi...

Страница 12: ...re the output current can be measured without interrupting the power loop The TX93 does NOT provide isolation between its input and the 4 20 mA output therefore an ungrounded thermocouple junction is...

Страница 13: ...1 7 Introduction This leads to maximum error at approximately the midpoint of the range as shown in Figure 1 4 Figure 1 4 Straight Line Approximation of a Curve...

Страница 14: ...Introduction 8 1 1 2 Features 4 20 mA output 0 1 full scale accuracy with respect to the mV input signal Upscale break protection Low Cost...

Страница 15: ...oduction 1 3 Models Available RANGE J K T E 40 to 120 F J1 E1 0 to 200 F J2 K2 T2 E2 0 to 300 F J3 K3 T3 E3 0 to 500 F J4 K4 T4 E4 0 to 750 F J5 K5 T5 E5 0 to 1000 F J6 K6 E6 Table 1 1 Range Code INPU...

Страница 16: ...ription TX93 Thermocouple Transmitter J K T or E NB1TX93 NB1 thermocouple probe 12 L 1 4 O D ungrounded junction 304SS sheath Insert range code from Table 1 1 For complete information on NB1 Thermocou...

Страница 17: ...refer to Figure 2 1 or 3 installed into the OMEGA mounting track part number RT using an OMEGA mounting bracket part number TX90 BR 4 installed into standard 35mm DIN rail using an OMEGA DIN rail mou...

Страница 18: ...2 2 Figure 2 4 shows a typical installation using the bracket and mounting track Figure 2 5 shows the TX90 DIN adapter Figure 2 1 Assembly of the Transmitter inside an OMEGA NB1 Protection Head Dimens...

Страница 19: ...2 13 Installation CAUTION Hand tighten transmitter mounting screws only Do not overtighten Figure 2 2 RT Mounting Track Dimensions in inches...

Страница 20: ...Installation 14 2 Figure 2 3 TX90 BR Mounting Bracket Dimensions in inches...

Страница 21: ...2 15 Installation Figure 2 4 Installation with the Bracket and Track Dimensions in inches...

Страница 22: ...Installation 16 2 Figure 2 5 TX 90 DIN DIN Rail Mounting Adapter in Inches...

Страница 23: ...gure 2 6 1 Connect a dc power supply in series with the load to 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...

Страница 24: ...Installation 18 2 Figure 2 6 Wiring Diagram for the TX 93...

Страница 25: ...ource with 0 001 mV resolution and 0 002 mV accuracy or Precision DVM with 0 002 mV accuracy and an adjustable mV source with 0 001 mV resolution OMEGA TRC III Ice Point Reference or stable ice bath T...

Страница 26: ...m distilled water b Fill the beaker with enough distilled water so that the ice just becomes slush but not enough to float the ice c Insert the reference thermocouple Figure 3 2 shows an alternate set...

Страница 27: ...itter being calibrated Make sure that the wiring polarities are correct Note that the RED thermocouple wire is NEGATIVE To check or adjust the calibration 1 Locate the Z zero and S span potentiometers...

Страница 28: ...the selected Z zero mV value Adjust the Z potentiometer to read 4 000 mA on the monitoring instrument 4 Set the dc mV source to the selected S span mV value Adjust the S potentiometer to read 20 000...

Страница 29: ...3 23 Calibration Instructions Figure 3 1 TX93 Calibration Set Up...

Страница 30: ...Calibration Instructions 24 3 Figure 3 2 TX93 Calibration Set Up Alternate...

Страница 31: ...Model Ref 32 F Zero Span TX93 Zero Span 40 120 F J1 1 961 2 527 0 1200 F J2 0 886 4 907 0 1300 F J3 0 886 7 949 0 1500 F J4 0 886 14 110 0 1750 F J5 0 886 21 787 0 1000 F J6 0 886 29 521 mV Input Mod...

Страница 32: ...t Input Range Model Ref 32 F Zero Span TX93 Zero Span 40 120 F 0 1200 F T2 0 675 3 968 0 1300 F T3 0 675 6 648 0 1500 F T4 0 675 12 574 0 1750 F T5 0 675 20 803 0 1000 F mV Input Model Ref 32 F TX93 Z...

Страница 33: ...Check the wiring using Figure 2 6 as a guide If the temperature of the thermocouple increases while the current magnitude decreases the problem could be caused by reversed polarity of the a thermocoup...

Страница 34: ...ire 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 a Measure the total resistance of each devi...

Страница 35: ...pply 7V For example a 24V power supply would give a maximum loop resistance of 17V 0 020A 850 ohms c Make sure the power supply is rated for at least 28 mA times the number of TX93 transmitters being...

Страница 36: ...Model No Description TX90 BR Mounting Bracket PSU 24B Unregulated Power Supply 24 Volts TX82B Process Loop Powered Indicator RT 48 Mounting Track TX90 DIN DIN Rail Mounting Adapter RAIL 35 2 6 5 Secti...

Страница 37: ...Span Adjustment Range 25 Power Supply Voltage Operating Range 7 Vdc to 35 Vdc 28 mA max required per transmitter Accuracy 0 1 of full scale includes effects of hysteresis repeatability and linearity p...

Страница 38: ...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 Out...

Страница 39: ...istance Vsupply 7V 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 Thermocouple Input Break Protection Upscale Impeda...

Страница 40: ...6 Notes 34...

Страница 41: ...6 Notes 35...

Страница 42: ...Notes 6 36...

Страница 43: ...wever 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 e...

Страница 44: ...ors Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial pH Conduct...

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