Campbell-scientific HMP50 Temperature and Relative Humidity Sensor Manuale Utente Scaricare il pdf (Pagina 17)

HMP50 Temperature and Relative Humidity Probe

Shipping Cap

(remove prior

to installation)

Protective Cap

and Filter

9598 RH Chip

FIGURE 6. Exploded View of HMP50 (as shipped)

The offset and gain on the HMP50 electronics can not be adjusted as part of a

recalibration. Replace the RH chip as needed.

8.1 Procedure for Removing RH Chip

1. Unscrew the protective cap.

2. Hold the plastic sides of the RH chip and unplug it.

To prevent scratching, avoid touching the silver RH chip,

and handle the RH chip with care.

CAUTION

3. Rinse the RH chip or dispose of the old RH chip.

4. Hold the sides of the rinsed or new chip and plug it in.

5. Screw on the protective cap.

9. References

Goff, J. A. and S. Gratch, 1946: Low-pressure properties of water from -160°

to 212°F, Trans. Amer. Soc. Heat. Vent. Eng., 51, 125-164.

Lowe, P. R., 1977: An approximating polynomial for the computation of

saturation vapor pressure, J. Appl. Meteor., 16, 100-103.

Weiss, A., 1977: Algorithms for the calculation of moist air properties on a

hand calculator, Amer. Soc. Ag. Eng., 20, 1133-1136.

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Campbell-scientific HMP50 Temperature and Relative Humidity Sensor Manuale Utente Pagina 17