Campbell HMP45C Guia do Utilizador descarregar pdf (Página 19)

User Guide

CR1000 Program using Differential Measurement Instructions Using SW12 on Datalogger

'CR1000 program to measure HMP45C 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)

'HMP45C Temperature & Relative Humidity Sensor measurements AirTC and RH:

SW12 (1 )

Delay(0,150,mSec)

VoltDiff (AirTC,1,mV2500,2,True,0,_50Hz,0.1,-40)

VoltDiff (RH,1,mV2500,1,True,0,_50Hz,0.1,0)

SW12 (0)

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

CallTable(Temp_RH)

NextScan

EndProg

CR10(X) Program using Differential Measurement Instructions Using SW12V on Datalogger

;Turn the HMP45C on.

;

01: Do (P86)

1: 41 Set Port 1 High ;Jumper wire from SW12V control to C1

;Yellow wire (C1) if using PSW12 device

;For CR23X or CR5000 use 49 for SW12V internal

;control port

;Pause 150 mSec before making measurements so the

;probe can stabilize on true readings.

;

02: Excitation with Delay (P22)

1: 1 Ex Channel

2: 0 Delay W/Ex (units = 0.01 sec)

3: 15 Delay After Ex (units = 0.01 sec)

4: 0 mV Excitation

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 27 28

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Campbell HMP45C Guia do Utilizador Página 19