User`s guide

User’s Guide ______________________________________________________________________
152 __________________________________________________________________M210662EN-A
Wind Transmitter
Periodic Maintenance
When Digital Wind Transmitter WT521 is installed to tropical, marine,
or cold temperature environments, it is important to take care that the
equipment is kept within specific operating conditions. The cable
glands must be properly tightened to avoid dust, dirt, or water to enter
into the equipment.
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 114 on page 153. 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.