Campbell Scientific HMP50 Temperature and Relative Humidity Sensor - Manual (Page 12)

HMP50 Temperature and Relative Humidity Probe
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
CallTable(Table1)
NextScan
EndProg
5.2 Example for CR10X
;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: 3 Loc [ RH_pct ]
5: .1 Mult ;See Table 4 for alternate multipliers
6: 0 Offset
;Limit the maximum relative humidity to 100%.
;
03: If (X<=>F) (P89)
1: 3
X Loc [ RH_pct ]
2: 3 >=
3: 100 F
4: 30 Then Do
04: Z=F (P30)
1: 100
F
2: 0 Exponent of 10
3: 3 Z Loc [ RH_pct ]
05: End (P95)
8