Vaisala WMS302 Podręcznik Użytkownika Pobierz pdf (Strona 174)

User's Guide ______________________________________________________________________

172 __________________________________________________________________M210630EN-B

Air Temperature and Relative Humidity Sensor

Periodic Maintenance

Calibration and maintenance of the air temperature and relative

humidity probe should be performed at regular intervals, depending on

the conditions of use and desired accuracy. The validity of the readings

should be checked annually.

The Air Temperature and Relative Humidity probes are easy to

maintain and calibrate. The sensor consists of a probe head and a handle

with cable. All calibration electronics are in the probe head, which can

be disconnected from the handle without disconnecting the wires, as

shown in Figure 144 on page 172. If you wish to continue the

measurement immediately, you can insert a calibrated probe head in

place of the disconnected one; this way the measurement is interrupted

for less than a minute.

0201-047

Figure 144 Probe Maintenance

The following numbers refer to Figure 144 on page 172.

1 = Adjustment trimmers: W = wet, D = dry, (T = temperature;

for factory use only)

2 = O-ring for sealing the probe weather tight

1 2 ... 169 170 171 172 173 174 175 176 177 178 179 ... 261 262

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Vaisala WMS302 Podręcznik Użytkownika Strona 174