Vaisala CT25K - 8.8 Boards of Board Frame DMF51 Replacement

Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
102
When there is reason to suspect malfunction of the Transmitter, turn the
power off (Note Paragraph 8.3 Start-up procedure) and do as follows:
1. Detach the ribbon cable connector of the transmitter from connector J10 at
the DMF51 Board Frame by pressing the latches apart. Refer to Figure 8-1
above.
2. Loosen the attachment ring (Figure 8-2) using a 2.5 mm Hexagon Key as a
lever; there are holes in the attachment ring for that purpose. If the
Transmitter begins to move along, stop it by hand from rotating. The laser
diode has been centered at the factory - do not apply force to the
Transmitter because it may disturb the centering. Take the Transmitter
in your hand.
3. Deliver the entire Transmitter to Vaisala.
Figure 8-2 Removing the Laser Transmitter
8.4.2 Replacement
To replace a Laser Transmitter CTT21 (Note Paragraph 8.3 Start-up
procedure.):
1. Take the Transmitter CTT21 in your hand and set it in place. Notice the
right position, the ribbon cable comes out from the back side. Rotate the
attachment ring (Figure 8-2) by hand and tighten it using a 2.5 mm
hexagon key as a lever. If the transmitter begins to move along, carefully
stop it by hand from rotating. Do not apply force to the transmitter itself
because it may disturb the centering.