The ceilometer's self diagnostic system runs
in the background and generates warnings and alarms according to issues discovered. The window
blower and the polarization unit are automatically checked once an hour. Malfunctions are
reported in data and status messages.
CL61 requires the following periodic maintenance.
Table 1. CL61 maintenance
| Task |
Frequency |
| Clean the window |
As needed |
| Check the door gaskets |
As needed |
| Perform a general check |
Annually |
| Clean and maintain painted surfaces |
Annually |
Check warnings and alarms regularly using a PC
with Ethernet connection.
| WARNING Because of the
danger of introducing additional hazards, do not install substitute parts or perform
any unauthorized modification to the instrument. Return the instrument to a Vaisala
office or authorized depot for service and repair to make sure that safety features
are maintained. |
| WARNING Verify outdoor
installation grounding periodically to minimize shock hazard. |
| WARNING Do not perform periodic maintenance on the system alone. Do not reach into
parts and assemblies that are AC (mains) powered and live except in the presence of someone
who can provide first aid. |