6. wiring for differential measurement examples – Campbell Scientific HC2S3 Temperature and Relative Humidity Probe User Manual

Page 24

Model HC2S3 Temperature and Relative Humidity Probe

TABLE 7-6. Wiring for

Differential Measurement Examples

Color Description

CR1000

CR10(X)

Brown Temperature 1H

Jumper to

Yellow

Temperature Signal

Reference

1L 1L

White Relative

Humidity 2H 2H

Yellow Signal

Reference 2L 2L

Gray Power

Ground G G

Clear Shield

Green Power 12V

12V

CR1000 program using differential measurements

'CR1000 program to measure HC2S3 with differential measurements

Public AirTC

Public RH

DataTable(Temp_RH,True,-1)

DataInterval(0,60,Min,0)
Average(1,AirTC,IEEE4,0)
Sample(1,RH,IEEE4)

EndTable

BeginProg
Scan(1,Sec,1,0)
'HC2S3 Temperature & Relative Humidity Sensor measurements AirTC and RH:

VoltDiff (AirTC,1,mV2500,1,True,0,_60Hz,0.1,-40)
VoltDiff (RH,1,mV2500,2,True,0,_60Hz,0.1,0)
If RH>100 And RH<103 Then RH=100

CallTable(Temp_RH)
NextScan
EndProg

CR10(X) program using differential measurement instructions

;{CR10X}
*Table 1 Program
01: 1.0000

Execution Interval (seconds)

;HC2S3 Temperature & Relative Humidity Sensor measurements AirTC and RH:

1: Volt (Diff) (P2)
1: 1

Reps

2: 25

2500 mV 60 Hz Rejection Range

3: 1

DIFF Channel

4: 3

Loc [ AirTC ]

5: 0.1

Multiplier

6: -40

Offset