Campbell HMP45C Guia do Utilizador descarregar pdf (Página 22)

HMP45C Temperature and RH Probe

CR10(X) Program that Computes Vapour Pressure and Saturation Vapour Pressure

;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

;Measure the HMP45C temperature.

;

03: Volt (SE) (P1)

1: 1 Reps

2: 5 2500 mV Slow Range ;CR510, CR500 (2500mv); CR23X (1000 mV);

21X, CR7 (5000 mV)

3: 3 SE Channel

4: 1 Loc [ T_C ]

5: .1 Mult

6: -40 Offset

;Measure the HMP45C relative humidity.

;

04: Volt (SE) (P1)

1: 1 Reps

2: 5 2500 mV Slow Range ;CR510, CR500 (2500mv); CR23X (1000 mV);

21X, CR7 (5000 mV)

3: 4 SE Channel

4: 2 Loc [ RH_frac ]

5: .001 Mult

6: 0 Offset

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Campbell HMP45C Guia do Utilizador Página 22