Campbell CMP10, Руководство по эксплуатации продукта

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Appendix B. Example Programs
B-3
B.3 Example Program for Measuring a CMP21
Although this example is for the CR1000X, other CRBasic data loggers are
programmed similarly. The following program measures the CMP21 every
second. It converts the pyranometer millivolt output to W • m
–2
. A pyranometer
calibration of 8.65 µV / W • m
–2
is used for the example program. The resistance
of the internal thermistor is converted to degree Celsius and then to Kelvin.
Every 10 minutes, the program outputs the average and standard deviation of
the flux (W • m
–2
) measurements and temperature measurements.
Wiring for this example is given in TABLE B-3 .
TABLE B-3. CR1000X Wiring for CMP21 Example Program
Wire Color Description CR1000X Jumper
1
White Solar Signal (+) 3H
Blue Solar Signal (–) 3L
⏚
Yellow Voltage Excitation VX1
Black Temp Signal 15 SE
Brown Signal Reference
⏚
Clear Shield
⏚
1 Jumper 3L to
⏚
with user-supplied 26 AWG or larger wire.
CRBasic Example B-3. CR1000X Example Program for Measuring a CMP21
'CR1000X Series Data Logger
Public PTemp
Public Batt_Volt
Public CMP21_Irr
Public CMP21_T_C
Public CMP21_T_K
Dim Rs,Vs_Vx
Units CMP21_Irr = W/m2
Units CMP21_T_C = Degrees C
Units CMP21_T_K = Degrees K
DataTable (TenMin,1,-1)
DataInterval (0,10,Min,10)
Minimum (1,Batt_Volt,FP2,0,False)
Sample (1,PTemp,FP2)
Average (1,CMP21_Irr,IEEE4,False)
StdDev (1,CMP21_Irr,IEEE4,False)
Average (1,CMP21_T_C,IEEE4,False)
StdDev (1,CMP21_T_C,IEEE4,False)
Average (1,CMP21_T_K,IEEE4,False)
StdDev (1,CMP21_T_K,IEEE4,False)
EndTable
BeginProg
Scan (1,Sec,0,0)