Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
103
Check that the transmitter is now in the correct position, that is, the sides
of the transmitter case are approx. parallel with the edges of the lower
part of the Optical Subassembly.
If this is not the case, loosen the attachment ring first, then correct the
transmitter position and fasten as described above.
2.  Attach the ribbon cable connector to the DMF51 Board Frame to
connector J10. Refer to Figure 8-1.
3.  Connect the Power Cable and the Maintenance Terminal. Turn the power on.
4.  If the transmitter has been replaced by a new one, do the following:
a) Open the command set by first typing OPEN↵  at the command
prompt and then typing the password ADVANCED↵.
b) Interrupt autoadjustments with the command
STOP↵
Then give the following commands
SET DATA_ACQ AUTOADJ OFF↵ sets the autoadjustments off
SET PORT TIMEOUT 20↵  sets the timeout of the dialog to
20 minutes
SET DATA_ACQ INTERVAL 15↵ sets interval for measurement
and message sending to 15
seconds
c) First check the prevailing settings with the command
GET FACTORY↵
The value of INLASER tells the prevailing factory setting of the
Transmitter Calibration Factor.
d)  Note the Calibration Factor of the transmitter (written on the
subassembly). If the transmitter has been replaced and the
Calibration Factor differs from the prevailing factory setting, give
the new Calibration Factor value (= new factory setting) with the
command:
SET FACTORY INLASER↵
and type the new Calibration Factor value ↵.
e) Set the laser power into effect with the command
SET DATA_ACQ TRANSMIT POWER_OF_P↵
and type the new value (= Calibration Factor) ↵. (The same
Calibration Factor value as in step d).