Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
104
f) Wait until a few measurement cycles have been completed, and the
new value has been updated in the status message. Give the
command
GET STATUS↵
g) Check from the status message under the title Transmitter that the
IN value of the transmitter in question equals the Calibration Factor.
h) Check from the status message under the title Transmitter the OUT
value which tells you the measured optical power, and write it
down. Give the command
SET FACTORY OUTLASER↵
and type the recent OUT value↵.
Wait again until a few measurement cycles have been completed,
and the new value has been updated in the status message. Give the
command
GET STATUS↵
Check from the status message that the Transmitter SENS
percentage is in the range 99%...101%. This tells you the present
measured OUT value compared to the factory setting.
i) Check further from the status message under the title Environment
the WINDOW value and write it down. Set this value as a reference
value of a clean window with the command:
SET FACTORY WIN_CLEAN↵
and enter the recent WINDOW value↵.
Wait again until a few measurement cycles have been completed,
and the new value has been updated in the status message. Give the
command
GET STATUS↵
Check from the status message that the WINDOW value percentage
is in the range 97%...103%. This tells you the present measured
WINDOW contamination value compared to the factory setting.
j) Then adjust the Internal Crosstalk Compensation according to
Paragraph 8.4.3.
5. Turn the power off. Then start the Ceilometer again and verify that
it is operating properly.
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