Vaisala AWS330, User Manual, Page: 84 / 298

User's Guide ______________________________________________________________________
80 __________________________________________________________________ M211296EN-A
Installing Air Temperature and Relative
Humidity Probe HMP155
It is recommended that you install the HMP155 probe and Radiation
Shield DTR503A onto a sensor support for WMO-compliant
measurement results.
NOTE The radiation shield is important in protecting the sensor from direct
sunlight, and must always be used.
1. Install the radiation shield DTR503A (number 2 in Figure 40 on
page 81) onto the sensor support.
2. Remove the protecting cover from the HMP155 probe. Loosen the
fastening ring of the sensor with your fingers and put the sensor
inside the radiation shield. Tighten the fastening ring without using
excessive force.
3. Lead the sensor cable along the sensor support and attach it with
cable ties.
4. Connect the sensor cable to the Temp. / Hum. connector on the
bottom of the enclosure; see section Connecting Sensor Cables on
page 97.