Vaisala HMP60 Manuel télécharger pdf (Page 22)

HMP60 Temperature and Relative Humidity Probe

7.6.2 Sample CR10(X) Program that Computes Vapor Pressure

and Saturation Vapor Pressure

;Measure the HMP60 temperature.

;

01: Volt (SE) (P1)

1: 1 Reps

2: 5 2500 mV Slow Range ;CR510 (2500 mV); CR23X (1000 mV); 21X,

CR7 (5000 mV)

3: 3 SE Channel ;Black wire (SE 3), Blue wire (G)

4: 1 Loc [ T_C ]

5: .1 Mult ;See Table 7-2 for alternate multipliers

6: -40 Offset ;See Table 7-2 for alternate offsets

;Measure the HMP60 relative humidity.

;

02: Volt (SE) (P1)

1: 1 Reps

2: 5 2500 mV Slow Range ;CR510 (2500 mV); CR23X (1000 mV); 21X,

CR7 (5000 mV)

3: 4 SE Channel ;White wire (SE 4), Blue wire (G)

4: 2 Loc [ RH_frac ]

5: .001 Mult ;See Table 7-3 for alternate multipliers

6: 0 Offset

;Limit the maximum value of relative humidity

;to 1 (expressed as a fraction).

;

03: If (X<=>F) (P89)

1: 2 X Loc [ RH_frac ]

2: 3 >=

3: 1 F

4: 30 Then Do

04: Z=F (P30)

1: 1 F

2: 0 Exponent of 10

3: 2 Z Loc [ RH_frac ]

05: End (P95)

;Compute the saturation vapor pressure in kPa.

;The temperature must be in degrees Celsius.

;

06: Saturation Vapor Pressure (P56)

1: 1 Temperature Loc [ T_C ]

2: 3 Loc [ e_sat ]

;Compute the vapor pressure in kPa.

;Relative humidity must be a fraction.

;

07: Z=X*Y (P36)

1: 3 X Loc [ e_sat ]

2: 2 Y Loc [ RH_frac ]

3: 4 Z Loc [ e ]

1 2 ... 17 18 19 20 21 22 23 24 25 26

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Vaisala HMP60 Manuel Page 22

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