Vaisala HUMICAP HMT310 Guide de l'utilisateur télécharger pdf (Page 25)

Chapter 3 ________________________________________________________________ Installation

VAISALA ________________________________________________________________________ 25

Mounting the Probes

Do not unsolder and then again resolder the probe cable from the mother

board during installation; this may alter the humidity calibration of the

transmitter.

Beware of Temperature Differences

In humidity measurement and especially in calibration it is essential that

the temperature of the probe and the measuring environment is the same.

Even a small difference in temperature between the environment and the

probe causes an error. As the curve in Figure 6 below shows, if the

temperature is +20 °C and the relative humidity 100 %RH, a difference

of ±1 °C between the environment and the probe causes an error of

±6 %RH.

0507-036

Figure 6 Measurement Error at 100 %RH when Difference

Between Ambient and Sensor Temperature is 1 °C

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Vaisala HUMICAP HMT310 Guide de l'utilisateur Page 25