Chapter 8 ___________________________________________________________________ Repair
VAISALA _______________________________________________________________________ 91
CHAPTER 8
REPAIR
This chapter explains how to remove and replace different parts of
Vaisala Ceilometer CL31.
Replacing Window Assembly CLW311
NOTE
The Ceilometer Window Assembly CLW311 is recommended to be
replaced indoors to prevent water and other contamination from
getting into the measurement unit.
To replace Ceilometer Window Assembly CLW311, you will need a
2.5 mm Allen-key and a screwdriver.
Then proceed as follows:
1.
Open the measurement unit door with the special key provided
with the unit. Then switch the power off with all three switches
(F1, F2, and Battery). For the location of the switches, refer to
Figure 18 on page 98 and Figure 19 on page 99.
WARNING
Disconnect the CT3839 power cable before continuing!
2.
Close the door and remove the measurement unit. To do this,
loosen the three attachment screws (marked A in Figure 5 on
page 23) on the back of the measurement unit, disconnect the
blower cable from connector J1 (see Figure 7 on page 25), and
pull out the unit.
