Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
87
6. PERIODIC MAINTENANCE
Periodic maintenance is normally limited to window cleaning. In addition,
Warnings and Alarms should be checked regularly with the maintenance
terminal or another terminal or PC with serial connection (See paragraph
4.4.11 Status Message “S”). Proper function of the Window Conditioner air
blower, the only mechanically moving part, should also be checked.
6.1 Alarms and warnings
The data message has to be checked for alarms and warnings at regular
intervals. At the second character of line two there is Warning and Alarm
information indicating the present status of the device as follows:
0 Self-check OK
W At least one Warning active, no Alarms
A At least one Alarm active
In case there is an active alarm or warning, more information is given at the
end of the second line as a binary code indicating the cause (paragraph 4.4.1).
The status message gives detailed information about the failure (paragraph
4.4.11).
Repair and service must be done according to instructions in Chapters 7 and 8.
6.2 Window Cleaning
The lens and window should always be clean of any dirt or particles during
operation. Data messages include a warning if the window is contaminated.
After the system has detected the contamination it starts the blower, which
removes contamination caused by precipitation etc.
• If the "Window Contaminated" warning does not disappear after a while
the window has to be cleaned.
• To clean the window first flush it with water to remove coarse grains.
During this operation, the enclosure door should be closed. Clean the
window with a soft lint-free cloth moistened with a mild detergent. Be
careful not to scratch the window surface.
The condition of the Window Conditioner air blower can be checked with the
maintenance terminal connected. Give the commands:
SET CONTROL BLOWER ON
SET CONTROL BLOWER OFF
In case of malfunction the Window Conditioner has to be replaced.
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