Campbell Scientific HMP50 Temperature and Relative Humidity Sensor - Manual (Page 11)

HMP50 Temperature and Relative Humidity Probe
The temperature and relative humidity signals from the HMP50 are measured
using two single-ended analog measurements (Instruction 1).
The probe output scale is 0 to 1000 millivolts for the temperature range of
-40
°C to +60°C and for the relative humidity range of 0 to 100%. Tables 3
and 4 provide calibration information for temperature and relative humidity.
TABLE 3. Calibration for Temperature
Units Multiplier
(degrees mV -1 )
Offset
(degrees)
Celsius 0.1 -40
Fahrenheit 0.18 -40
TABLE 4. Calibration for Relative Humidity
Units Multiplier
(% mV -1 )
Offset
(%)
Percent 0.1 0
Fraction 0.001 0
TABLE 5. Wiring for CR1000 and CR10X Examples
Description Color CR1000 CR10(X)
Temperature Black SE 1 SE 3 (2H)
Relative Humidity White SE 2 SE 4 (2L)
Signal & Power Reference Blue G G
Power Brown 12 V 12 V
Shield Clear G
5.1 Example for CR1000
'CR1000
'Created by SCWIN (2.1)
Public AirTC
Public RH
DataTable(Table1,True,-1)
DataInterval(0,60,Min,0)
Average(1,AirTC,FP2,0)
Sample(1,RH,FP2)
EndTable
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