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AM25T

Solid-State

Thermocouple

Multiplexer

Revision: 1/19

Copyright © 1995 – 2019

Campbell Scientific, Inc.

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Summary of Contents for AM25T

Page 1: ...AM25T Solid State Thermocouple Multiplexer Revision 1 19 Copyright 1995 2019 Campbell Scientific Inc...

Page 2: ...ucts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per...

Page 3: ...ing address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and co...

Page 4: ...beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit cl...

Page 5: ...nd G Ground Terminals 3 4 5 Analog Ground 3 4 6 Reset RES 3 4 7 Clock CLK 3 5 Terminal Strips 4 6 Specifications 5 7 Installation 6 7 1 Installing the AM25T 6 7 2 Data Logger to AM25T Wiring 7 7 3 Sen...

Page 6: ...Terminal Strips 4 5 2 AM25T with Spring Loaded Terminals 5 7 1 External Battery Connections 7 7 2 Differential Measurement of Type T Thermocouple 9 7 3 Differential Voltage Measurement 9 8 1 Short Cu...

Page 7: ...suitable for resistive bridge measurements high impedance of the solid state relays or multiplexing power 25 mA maximum switching current A maximum of 25 thermocouples differential voltage measurement...

Page 8: ...ng material for product that may be concealed Check model number part numbers and product descriptions against the shipping documents Model or part numbers are found on each product On cables the numb...

Page 9: ...rminal located between the VX and HI terminals Analog ground is not common with the other ground terminals labeled G The analog ground terminal must be connected to the data logger ground as shown in...

Page 10: ...e length of the AM25T are for sensor connections All inputs are protected by spark gaps All terminals accept stripped and tinned wires up to AWG wire gauge 16 A strain relief flange is located between...

Page 11: ...n tighten the screw 6 Specifications Power Unregulated 9 6 to 16 Vdc 12 Vdc nominal Current Drain Quiescent 0 5 mA Active 1 0 mA typical Enable Inactive 0 9 V Active 3 5 to 5 0 V 7 V max Clock The rel...

Page 12: ...0 Maximum Switching Current 25 mA switching currents greater than 25 mA damages the relays and renders them unusable Compliance View the EU Declaration of Conformity at www campbellsci com am25t Assum...

Page 13: ...te battery might be used when the AM25T is installed some distance from the data logger Ground must be connected between the data logger and the AM25T FIGURE 7 1 FIGURE 7 1 External Battery Connection...

Page 14: ...rence PRT is located in the AM25T This reference temperature does not require an additional data logger input to measure the reference Thermal gradients between the AM25T sensor input terminals and th...

Page 15: ...nsor Types Different sensors may be mixed on the AM25T Additional loops and measurement instructions will be required 8 Operation 8 1 General Measurement Considerations Wires have additional capacitan...

Page 16: ...many program configurations for various supported sensors providing a quick way to generate a program and wiring diagram FIGURE 8 1 Short Cut can be downloaded free of charge www campbellsci com FIGU...

Page 17: ...ntrol the AM25T multiplexer with the data logger The instruction measures the PRT incorporated in the AM25T and uses it as a reference temperature for thermocouple measurements The AM25T instruction a...

Page 18: ...g the procedure in Section 4 Overview p 2 Finish the program On the Advanced tab click the CRBasic Editor button The program opens in CRBasic with the name noname CR_ Provide a name and save the progr...

Page 19: ...Common High HI U5 Common Low LO U6 1 Analog Ground is the terminal located between the VX and HI terminals on the AM25T CRBasic Example B 1 CR6 Program Using One Instruction to Measure Both the Refere...

Page 20: ...Battery BattV Default CR6 Datalogger Wiring Panel Temperature measurement PTemp_C PanelTemp PTemp_C 60 Type T copper constantan Thermocouple measurements Temp_C on the AM25T Multiplexer AM25T Temp_C 2...

Page 21: ...Asia Location Bangkok Thailand Email info campbellsci asia Website www campbellsci asia China Location Beijing P R China Email info campbellsci com cn Website www campbellsci com cn Spain Location Ba...

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