Campbell AM25T, Product Manual

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B-1
Appendix B. Example Program
In this example, 25 type T thermocouples are connected to the AM25T. One
AM25T() instruction will measure the AM25T PRT and the thermocouples.
This program is written for the CR6 datalogger. Other CRBasic data loggers
are programmed similarly. TABLE B-1 shows the wiring used with the
example.
TABLE B-1. Wiring for CR6 Example
Function AM25T Data Logger
+12 Vdc Power 12V 12V
Power Ground G G
Analog Ground 1
⏚ ⏚
Clock CLK U1
Reset RES U2
PRT Excitation VX U3
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 Reference
Temperature and Thermocouples
'CR6 Series
'Declare Variables and Units
Public BattV
Public PTemp_C
Public RTempC
Public Temp_C(25)
Units BattV=Volts
Units PTemp_C=Deg C
Units RTempC=Deg C
Units Temp_C=Deg C
'Define Data Tables
DataTable (Dat15sec,True,-1)
DataInterval (0,15,Sec,10)
Sample (1,RTempC,FP2)
Sample (25,Temp_C(1),FP2)
EndTable
DataTable (Dat5Min,True,-1)
DataInterval (0,5,Min,10)
Minimum (1,BattV,FP2,False,False)
Average (1,RTempC,FP2,False)
Average (25,Temp_C(1),FP2,False)
EndTable