Chapter 6 ______________________________________________________________Maintenance
VAISALA_______________________________________________________________________ 91
CHAPTER 6
MAINTENANCE
This chapter provides information that is needed in basic maintenance of
the CL31 Ceilometer.
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 a serial connection
(see section CL31 Status Message on page 70). Proper function of the
window blower, the only mechanically m
oving part, is automatically
checked once an hour. Malfunction is reported in the data and status
messages.
Alarms and Warnings
The data message has to be checked for alarms and warnings on a regular
basis. The second character in line two contains warning and alarm
information indicating the present device status 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. The
status
message gives detailed information about the failure. See section
Data Messages on page 62.
Repair and service must be done according to the instructions in Chapter
7, Troubleshooting, on page 95 and Chapter 8, Repair, on page 103.
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