Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
95
Relative humidity > 85
% warning (option)
Water has been
condensed inside the
ceilometer. Leakage
in the enclosure or
leakage in the door
Take the ceilometer inside, open the
maintenance door and let it dry in a
warm air conditioned place.
Condensed water on optical surface
may disturb the measurement. There
is a danger for short circuits.
Receiver optical cross-
talk compensation poor
warning
Obstacle or dirt on
the lens or on the
window
Check the optical surfaces. Clean, if
contaminated.
The compensation
fiber is damaged
When sky is clear but the GAIN is
low and the PLEN is short, the fiber
is most likely broken. Remove the
optical fiber carefully. Place the
other end near a light source. If the
light is dim at the other end of the
fiber, the fiber is damaged. Replace
it.
The compensation
fiber is misplaced
Do compensation adjustment
following the replacement
instructions (Chapter 8. Repair)
Blower suspect
warning
Cable is not
connected
Check that the blower cable is
connected.
Window conditioner
circuit braker F2 is
not ON
Check that the window conditioner
circuit braker F2 is ON
Line voltage level is
not correct
Check that the line voltage is present
and correct.
Blower is stuck Check if visible obstacles disable the
blower operation.
Blower is damaged Replace the blower.
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