Campbell Scientific NR01 Net Radiometer - Manual (Page 31)

NR01 Four-Component Net Radiation Sensor
'NR01 Net Radiometer measurements SR01Up, SR01Dn, IR01Up, IR01Dn, NR01TC, NR01TK,
'NetRs, NetRl, Albedo, UpTot, DnTot, NetTot, IR01UpCo, and IR01DnCo
'Uses fixed ranges as they fall more in line with the range of sensor outputs, so no need to
'autorange
VoltDiff(SR01Up,1,mV50,1,True,200,250,SR01Upcal,0)
VoltDiff(SR01Dn,1,mV50,2,True,200,250,SR01DownCal,0)
VoltDiff(IR01Up,1,mV20,3,True,200,250,IR01Upcal,0)
VoltDiff(IR01Dn,1,mV20,4,True,200,250,IR01DownCal,0)
'Note maximum sensor temperature with this excitation setting is just over +50 C.
Resistance (NR01TK,1,mV200,6,Ix1,1,1675,True ,True,200,250,1.0,0)
'Formulate the ratio Rs/R0
NR01TK=NR01TK/100
PRT(NR01TK,1,NR01TK,1,273.15)
'Compute Net short-wave radiation, Net long-wave radiation, Albedo and Net Radiation
NR01TC=NR01TK-273.15
NetRs=SR01Up-SR01Dn
NetRl=IR01Up-IR01Dn
Albedo=SR01Dn/SR01Up
UpTot=SR01Up+IR01Up
DnTot=SR01Dn+IR01Dn
NetTot=UpTot-DnTot
IR01UpCo=IR01Up+5.67*10^-8*NR01TK^4
IR01DnCo=IR01Dn+5.67*10^-8*NR01TK^4
'Call Data Tables and Store Data
CallTable(Table1)
NextScan
EndProg
Proper entries for the input channels will vary with program and
input channel usage. NOTE
5.2.3 Example 3, CR23X Program Using Differential Channels
Program Example 3 requires six differential channels and the 4WPB100
module to measure the four radiation outputs and the Pt-100 temperature
sensor. Wiring is shown in Tables 4.3-1 and 4.3-3 above, using differential
channels 1..5. The program measures the sensors every 2 seconds, then
calculates and stores the following data to final storage every 60 minutes:
Array ID
Year
Julian
Day
Hour/Minute
Avg SR01 Up (shortwave radiation)
Avg SR01 Down (shortwave radiation)
Avg IR01 Up (longwave radiation)
Avg IR01 Down (longwave radiation)
Avg NR01 temperature (degrees C)
Avg NR01 temperature (degrees K)
Avg Net shortwave radiation
Avg Net longwave radiation
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