Specifications

AM25T Solid State Multiplexer

04: BR Transform Rf[X/(1-X)] (P59) ;Calculate RTD resistance R/R0

1: 1 Reps

2: 1 Loc [ RefTemp_C ]

3: 10.025 Multiplier (Rf)

05: Temperature RTD (P16) ;Calculate reference temperature

1: 1 Reps

2: 1 R/R0 Loc [ RefTemp_C ]

3: 1 Loc [ RefTemp_C ]

4: 1.0 Mult

5: 0.0 Offset

06: Beginning of Loop (P87) ;Loop through thermocouple channels

1: 0 Delay

2: 25 Loop Count

07: Do (P86) ;Clock the AM25T twice

1: 71 Pulse Port 1

08: Do (P86)

1: 71 Pulse Port 1

09: Thermocouple Temp (DIFF) (P14) ;Measure the connected thermocouple

1: 1 Reps

2: 21 2.5 mV 60 Hz Rejection Range

3: 1 DIFF Channel

4: 1 Type T (Copper-Constantan)

5: 1 Ref Temp (Deg. C) Loc [ RefTemp_C ]

6: 2-- Loc [ TC_1 ]

7: 1.0 Mult

8: 0.0 Offset

10: End (P95) ;End loop

11: Do (P86) ;Turn off AM25T

1: 52 Set Port 2 Low

Example 2. CR10(X) Program for Measuring 25 Type T Thermocouples with the Differential

Thermocouple Instruction and Long Lead Length Compensation on the RTD Measurement

*Table 1 Program

01: 10 Execution Interval (seconds)

01: Set Port(s) (P20) ;Configure Control Ports for 1 millisecond pulse

1: 9999 C8..C5 = nc/nc/nc/nc

2: 9933 C4..C1 = nc/nc/1ms/1ms

02: Do (P86)

1: 42 Set Port 2 High ;Turn On AM25T