Vaisala CL31 - Figure 24 Laser Transmitter CLT321

USER'S GUIDE____________________________________________________________________
108 _________________________________________________________________ M210482EN-D
0910-112
Figure 24 Laser Transmitter CLT321
The transmitter should be replaced if the ceilometer unit has been
generating warnings and alarms, and a malfunction with the operation of
the transmitter has been detected.
To replace Ceilometer Laser Transmitter CLT321, you will need a
2.5 mm Allen-key.
Then proceed as follows:
1. Open the measurement unit door and confirm that there is an active
transmitter failure. In case of a transmitter failure, the
CLT ok
LED will be off. Refer to Figure 26 on page 111.
2. Sw
itch off the power with all three switches (F1, F2, and Battery).
For the location of the switches, see Figure 15 on page 40 and
Figure 16 on page 41.
WARNING
Disconnect the power cable from connector J2 before continuing.
3. Detach the transmitter ribbon cable (refer to number 10 in Figure
22 on page 104) from Ceilometer Engine Board CLE321.
4. To detach th
e transmitter, loosen the transmitter ring by turning it
to the right. If necessary, you can use a 2.5-mm Allen key as a
lever. Remove the transmitter from the unit.
5. Place the new transmitter to its place and tighten the transmitter
ring in such a way that the labels of the transmitter face the
measurement unit door.
6. Connect the transmitter ribbon cable to the CLE321 board.