Campbell Scientific CS135 Lidar Ceilometer - Manual (Page 65)

User Guide
57
LINE 4
ETX CR LF
ETX = End-of-Text Character
CR LF
= Carriage Return + Line Feed
7. Maintenance
7.1 General
The CS135 is a robust weather resistant instrument and there is no need for
routine maintenance other than cleaning. The instrument performance is
monitored and any potential problems are covered by error messages.
7.2 Cleaning
The CS135 window will require cleaning from time to time. The frequency of
required cleaning depends on the exposure of the instrument to contaminants such
as salt and dust. This will vary depending on the site location. The CS135 is
capable of self diagnosing dirty lenses and will indicate in its output when the
lenses are contaminated.
In any case we suggest six monthly intervals for locations not prone to
contaminants and monthly intervals for those prone to contamination (coastal,
roadside or airport use). In some cases more frequent cleaning may be required
where there are high levels of contaminants and high dependency on the
instrument output.
If the window requires cleaning, it is very important that only a
proper lens cloth or lens tissue is used. The use of
inappropriate materials to clean the windows can permanently
damage or reduce their effectiveness leading to reduced
performance. CAUTION