Specifications

Appendix A. Single-Ended Measurements
A-4
03: 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)
04: 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
05: Beginning of Loop (P87) ;Loop through thermocouple channels
1: 0 Delay
2: 25 Loop Count
06: Step Loop Index (P90) ;Set index to advance 2 locations/loop
1: 2 Step
07: Do (P86) ;Clock the AM25T twice
1: 41 Set Port 1 High ;Setting high then low is faster than pulsing w/21X
08: Do (P86)
1: 51 Set Port 1 Low
09: Do (P86)
1: 41 Set Port 1 High
10: Do (P86)
1: 51 Set Port 1 Low
11: Thermocouple Temp (SE) (P13) ;Measure the connected thermocouples
1: 2 Reps
2: 1 5 mV Slow Range
3: 1 SE 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
12: End (P95) ;End of loop
13: Do (P86) ;Turn off AM25T
1: 52 Set Port 2 Low
A.1.2 Single-Ended Voltage Measurement
Connect two single-end sensors to the differential AM25T input channel.
Connect the sensor shields to the ground terminals next to the input channel. Up
to 50 single-ended voltage sensors may be measured by two single-ended
datalogger channels (Figure A-2).