Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
94
Battery low warning The unit has been
powered too long
using the backup
battery
Connect the line voltage or replace
the battery
Recharging of the
battery fails
If the battery is old, replace it.
If the battery is OK, check the
operation of the DPS52 DC
Converter.
Laser power low
warning
Laser diode too old Replace Transmitter CTT21.
Optics monitor
CTL21 failure
If you have replaced the Transmitter
CTT21 and the warning did not
disappear, replace the CTL21 Optics
Monitor.
Laser temperature high
or low warning
Environment
temperature too high
If the environment temperature is
above 60°C do not operate the
ceilometer.
Direct sunlight can burn the laser
diode. Use Tropics window or turn
the ceilometer away.
Environment
temperature too low
If the environment temperature is
below -50°C the heating capacity is
not sufficient. Do not operate the
ceilometer.
Ceilometer is battery
operated
If the ceilometer is battery operated,
all the heating functions are disabled
and the unit can be operated only in
temperatures above -10°C. Connect
the line voltage and wait for a while.
Heating fails Check the Transmitter Board
(CTT21) where the heating circuitry
is located.
Check that the DC Converter
(DPS52) supplies the current for the
heating.
Internal temperature
high or low warning
Environment
temperature above
60°C or below
-50°C
Do not operate the ceilometer.
Voltage high or low
warning
Line voltage is not
OK
Check that the line voltage is present
and correct.
Ceilometer is battery
operated
This warning is always given when
the ceilometer is battery operated.
DC Converter board
DPS52 is damaged
Check the status message. If there is
an asterisk (*), the voltage exceeds
the limits.
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