Campbell-scientific HMP155A Temperature and Relative Humidity Probe Instrukcja Użytkownika Pobierz pdf (Strona 29)

Appendix B. Example Programs

B.1 Single-Ended Voltage Measurement Examples

These examples use the single-ended voltage instruction to measure the sensor

and use the datalogger’s SW12V terminal to power the sensor only when it is

being measured. TABLE B-1 shows the wiring used for these examples.

TABLE B-1. Wiring for Single-ended

Measurement Examples

Color Description CR1000 CR10(X)

Yellow Temperature SE 2 (1L) SE 3 (2H)

Blue Relative Humidity SE 1 (1H) SE 4 (2L)

White Signal Reference

Jumper from

SW12V Control

Red Power SW12V SW12 V

Black Power Ground

Clear Shield

B.1.1 CRBasic Single-Ended Measurement Program

Below is an example CR1000 program. Other CRBasic dataloggers are

programmed similarly.

'CR1000 program to measure HMP155A with single-ended 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(5,Sec,1,0)

'HMP155A Temperature & Relative Humidity Sensor measurements AirTC and RH:

PortSet (9,1)

Delay(0,2,Sec)

VoltSE(AirTC,1,mV2500,2,0,0,_60Hz,.14,-80)

VoltSE(RH,1,mV2500,1,0,0,_60Hz,0.1,0)

PortSet (9,0)

If RH>100 And RH<108 Then RH=100

CallTable(Temp_RH)

NextScan

EndProg

B-1

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 47 48

Brak uwag

Campbell-scientific HMP155A Temperature and Relative Humidity Probe Instrukcja Użytkownika Strona 29