Vaisala HUMICAP DMT132 Podręcznik Użytkownika Pobierz pdf (Strona 57)

Chapter 5 ______________________________________________________________ Maintenance

VAISALA _______________________________________________________________________ 55

Humidity Calibration and Adjustment

(RHCAL)

The procedure below describes a humidity measurement calibration and

adjustment using the serial line commands and the Vaisala Humidity

Calibrator HMK15. You can use the procedure to do a one-point

calibration (offset) or a two-point calibration (offset and gain).

- To use the HMK15 humidity calibrator with the DMT132 you need

the special cover set for HMK15 (Vaisala order code 230914).

- One-point calibration requires a < 50 %RH reference

- Two-point calibration requires additionally a > 50 %RH reference,

with over 30 %RH difference between the two points.

NOTE

Even though the transmitter outputs dewpoint, the humidity calibration

procedure is performed using relative humidity (RH) values. You can use

the Humidity Calculator to convert between dewpoint and relative

humidity. The Humidity Calculator can be found at:

www.vaisala.com/humiditycalculator

1103-037

Figure 27 Calibrating DMT132 Using HMK15 and USB Cable

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Vaisala HUMICAP DMT132 Podręcznik Użytkownika Strona 57