Campbell Scientific AM25T 25-Channel Solid State Multiplexer - Manual (Page 19)

AM25T Solid State Multiplexer
03: Full Bridge (P6) ;Measure the output of the reference temp. full bridge
1: 1 Reps
2: 23 25 mV 60 Hz Rejection Range ;See Table 6-1 for older AM25T multiplexers
3: 1 DIFF Channel
4: 1 Excite all reps w/Exchan 1
5: 1200 mV Excitation ;See Table 6-1 for older AM25T multiplexers
6: 1 Loc [ RefTemp_C ]
7: -0.001 Mult
8: 0.09707 Offset
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
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