Campbell Scientific NR-LITE2 Net Radiometer - Manual (Page 21)

NR-LITE2 Net Radiometer
the calibration factor into 1000. For example, if the calibration factor is 15.8
µV/(W m
-2 ), the multiplier is:
1000/15.8 = 63.29 (W m -2 )/mV
7.2.3 Example Programs
7.2.3.1 CR3000 Example Program without Wind Speed Correction
Shown below is an example program written for the CR3000 datalogger.
TABLE 7-3 provides the wiring for the example program. In this example, the
datalogger measures the output from the sensor every 5 seconds and outputs
the average net radiation every hour. The calibration factor used will only
apply for one specific sensor. A new value will need to be calculated for every
different sensor based on the Certificate of Calibration for that sensor (Section
7.2.2, Calibration Factor).
TABLE 7-3. Wiring for CR3000 Example
Color Function CR3000 Channels
Red Radiation Signal 1H
Blue Signal Reference 1L
Jumpered to
Black Shield
'CR3000
'Declare Variables and Units
Public BattV
Public NR_Wm2
Units BattV=Volts
Units NR_Wm2=W/meter^2
'Define Data Tables
DataTable(Table1,True,-1)
DataInterval(0,60,Min,10)
Average(1,NR_Wm2,FP2,False)
EndTable
DataTable(Table2,True,-1)
DataInterval(0,1440,Min,10)
Minimum(1,BattV,FP2,False,False)
EndTable
'Main Program
BeginProg
Scan(5,Sec,1,0)
'Default Datalogger Battery Voltage measurement BattV
Battery(BattV)
'NR-LITE2 Net Radiometer (no wind speed correction) measurement NR_Wm2
VoltDiff(NR_Wm2,1,mV50,1,True,0,_60Hz,100,0)
'Call Data Tables and Store Data
CallTable(Table1)
CallTable(Table2)
NextScan
EndProg
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