Product manual

Model HC2S3 Temperature and Relative Humidity Probe

BeginProg

Scan (1,Sec,1,0) 'Run main scan 1 second

Battery (Battery_volts)

PanelTemp (Ptemp_C,250)

'add additional instructions to be executed every 1 second

CallTable (Table1)

NextScan

SlowSequence

Scan (5,Sec,0,0) 'Run slow sequence scan every 5 seconds

PortSet (9,TRUE) 'Turn on HC2S3

Delay (0,3000,mSec) 'Wait 3 seconds for HC2S3 to warm-up

VoltSe (AirTC,1,mV2500,2,0,0,_60Hz,0.1,-40) 'Measure HC2S3 temperature

VoltSe (RH,1,mV2500,1,0,0,_60Hz,0.1,0) 'Measure HC2S3 relative humidity

PortSet (9,FALSE) 'Turn off probe

NextScan

EndProg

5.2 Example Programs using Differential Measurement

Instructions

Temperature and humidity are measured on differential input channels 1 and 2

respectively. The program sets relative humidity = 100 if the measured value

is > 100 but less than 103%. Values > 103% are not set = 100, and indicate a

problem with the sensor or its calibration.

TABLE 5-4. Wiring for

Differential Measurement Examples

Color Description CR1000 CR10(X)

Brown Temperature 1H 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