Campbell Scientific HMP60 HMP60 Temperature and Relative Humidity Probe - Page 18

HMP60 Temperature and Relative Humidity Probe The temperature and relative humidity signals from the HMP60 are measured using two single-ended analog measurements (VoltSE() in CRBasic or Instruction 1 in Edlog). The probe output scale is 0 to 1000 millivolts for the temperature range of -40° to +60°C and for the relative humidity range of 0 to 100%. Tables 7-2 and 7-3 provide calibration information for temperature and relative humidity. TABLE 7-2. Calibration for Temperature Units Celsius Fahrenheit Multiplier (degrees mV-1) 0.1 0.18 Offset (degrees) -40 -40 TABLE 7-3. Calibration for Relative Humidity Units Percent Fraction Multiplier (% mV-1) 0.1 0.001 Offset (%) 0 0 TABLE 7-4. Wiring for CR1000 and CR10X Examples Description Temperature Relative Humidity Signal & Power Reference Power Shield Color Black White Blue Brown Clear CR1000 SE 1 SE 2 G 12 V CR10(X) SE 3 (2H) SE 4 (2L) G 12 V G 7.4.1 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 BeginProg Scan(5,Sec,1,0) 'HMP60 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