Vaisala HUMICAP HMT330 SERIES Uživatelská příručka stáhnout pdf (Strana 40)

User's Guide ______________________________________________________________________

40 __________________________________________________________________ M210566EN-H

Probe Mounting

In humidity measurement and especially in calibration it is essential that

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

small difference in temperature between the environment and the probe

causes an error. As the curve 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.

The graph below illustrates the measurement error at 100 %RH when the

difference between the ambient and sensor temperature is 1 °C.

0507-023

Figure 22 Measurement Error at 100 %RH

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 177 178

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Vaisala HUMICAP HMT330 SERIES Uživatelská příručka Strana 40