Vaisala CT25K - Page 138

Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
124
H
Hard target test............................................... 92
Hardware history...........................................viii
Height normalization...................................... 51
I
Infrared interference filter.............................. 57
Installation..................................................... 10
Internal heaters subassembly CT25039........... 72
Internal voltages............................................. 43
Inversion........................................................ 52
L
Laser................................................................ 8
Laser classification........................................... 8
Laser diode .................................................... 59
Laser safety............................................... ix, 60
Laser transmitter CTT21 ................................ 59
Removal .................................................. 101
Replacement............................................ 102
Specifications .............................................. 8
Technical description................................. 59
Letter case in commands ................................ 25
LIDAR....................................................... 1, 55
Lidar equation................................................ 50
LIDAR measurement...................................... 55
Lidar ratio...................................................... 51
Line & power subassembly CTP241............... 70
Battery 4592 replacement instructions ..... 121
Removal .................................................. 117
Replacement............................................ 119
List of commands........................................... 28
M
Maintenance................................................... 87
Alarms and warnings ................................. 87
Battery check............................................. 88
Maintenance terminal PSION3
Connecting PSION3 to CT25K .................. 18
Operation................................................... 18
Port settings............................................... 76
PSION3 ..................................................... 17
Manual angle setting ...................................... 47
Manual message............................................. 45
Max irradiance................................................. 8
Measurement mode ........................................ 37
Measurement parameters................................ 37
Measurement range .......................................... 9
Measurement signal ....................................... 49
Measurement unit........................................... 53
Mechanical specifications ................................ 3
Meteorological Optical Range MOR .............. 51
Mobile operation............................................ 21
Modem board DMX50 ..................................... 7
Modem board DMX55 ..................................... 6
Modem DMX50............................................. 78
Connector layout........................................ 79
LED indicators........................................... 79
Safety precautions...................................... 79
Switched point-to-point connections .......... 78
Technical description.................................78
Modem DMX55 .............................................76
Connector layout........................................ 77
Fixed point-to-point connections................76
LED indicators...........................................77
Safety precautions......................................77
Technical description.................................76
MOR..............................................................51
Motherboard...................................................63
Mounting the pedestal .................................... 12
N
Narrow-band filter..........................................59
No-break power supply.....................................4
Noise cancellation .......................................... 50
Normal operation............................................22
O
OPEN command............................................. 26
Operating principle.........................................49
Operation modes
CONTINUOUS.......................................... 25
STANDBY.................................................25
Optical cross-talk ..................................... 57, 60
Optical filter.....................................................8
Optical subassembly CTB22...........................58
Optical system..................................................9
Optical termination hood.................... 2, 89, 100
Optics monitor CTL21....................................61
Removal................................................... 114
Replacement ............................................ 115
Output interface................................................4
Overvoltage protection ............................. 4, 5, 6
P
Parts list ......................................................... 54
Password........................................................27
PC terminal cable.............................................3
Performance.....................................................9
Periodic maintenance......................................87
Pin connections ............................................5, 6
PIN photodiodes.............................................61
Polling mode.................................................. 45
Polling string ............................................. 45
Polling string format ..................................33
Power and signal termination boxes................ 16
Wire dimensions ........................................16
Power consumption ..........................................3
Power disconnection....................................... 71
Prevailing control and parameter settings ....... 46
Principle of operation..................................... 49
Processor........................................................ 64
Processor board DMC50B..............................63
A-to-D converter........................................64
DIP switch settings .................................... 66
Processor ...................................................64
Serial communication ports........................ 64
Technical information................................65
Proper operation.............................................21
PSION3..........................................................89