Campbell Scientific HMP50 Temperature and Relative Humidity Sensor - Manual (Page 15)

HMP50 Temperature and Relative Humidity Probe
'CR1000
Public AirTC
Public RH
Public VP
DataTable(Table1,True,-1)
DataInterval(0,60,Min,0)
Average(1,AirTC,FP2,0)
Sample(1,RH,FP2)
Average(1,VP,
FP2,0)
EndTable
BeginProg
Scan(5,Sec,1,0)
'HMP50 Temperature & Relative Humidity Sensor measurements AirTC and RH:
VoltSE(AirTC,1,mV2500,1,0,0,_60Hz,0.1,-40.0)
VoltSE(RH,1,mV2500,2,0,0,_60Hz,0.1,0)
If (RH>100) And (RH<108) Then RH=100
VaporPressure(VP,AirTC,RH)
CallTable(Table1)
NextScan
EndProg
7.2 Sample CR10(X) Program that Computes Vapor Pressure
and Saturation Vapor Pressure
;Measure the HMP50 temperature.
;
01: Volt (SE) (P1)
1: 1
Reps
2: 5 2500 mV Slow Range ;CR510 (2500 mV); CR23X (1000 mV); 21X,
CR7 (5000 mV)
3: 3 SE Channel ;Black wire (SE 3), Blue wire (G)
4: 1 Loc [ T_C ]
5: .1 Mult ;See Table 3 for alternate multipliers
6: -40 Offset ;See Table 3 for alternate offsets
;Measure the HMP50 relative humidity.
;
02: Volt (SE) (P1)
1: 1
Reps
2: 5 2500 mV Slow Range ;CR510 (2500 mV); CR23X (1000 mV); 21X,
CR7 (5000 mV)
3: 4 SE Channel ;White wire (SE 4), Blue wire (G)
4: 2 Loc [ RH_frac ]
5: .001 Mult ;See Table 4 for alternate multipliers
6: 0 Offset
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