Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
111
Check that the SENS value is OK. The receiver sensitivity tells you the
present measured receiver value compared to the factory setting. If the
SENS value is OK, the receiver installation is ready and you can skip
steps g) and h).
g) If the SENS value is not within range, type the following command
GET VALUE OTHERS RECVALUE↵
which prints the measured receiver test values on your screen. Note the
OUT value and write it down.
Then give a new receiver test value with the command
SET FACTORY RECVALUE
and type the recent OUT value of the output RECEIVER TEST
VALUE.
h) Wait until a few measurement cycles have been completed. Give the
command
GET STATUS↵
Check in the status message the SENS value, which should be OK.
5. Turn the power off. Start the Ceilometer again and verify that it is
operating properly.
8.5.3 Coaxial Cable Replacement
In case Receiver Failure Alarm or Receiver Optical Crosstalk Compensation
Poor Warning exist, the reason may be a defective Coaxial Cable instead of a
Receiver.
WARNING
Hazardous voltage 500 V is present at the Receiver and at
the Board Frame DMF51. Both the line and the battery
switches must be turned off before removing the Coaxial
Cable.
8.5.3.1 Removal
To detach the Coaxial Cable, you have to detach the receiver first as follows:
1. Detach the Compensation Fiber from the receiver by loosening the screw
(See Figure 8-5) with a 1.5 mm hexagon key and pulling the fiber end
gently out. Take care not to twist the compensation fiber.
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