Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
53
5.2 Technical Description
5.2.1 General
Figure 5-2 below shows the internal layout of the Measurement Unit and the
following figure 5-3 the subassembly interconnections. Summary of part num-
bers and subassemblies is listed in Table 5-1. The technical description is split
into subparagraphs according to Unit Block Diagram illustrated in Fig. 5-4.
For more detailed block diagrams and descriptions, see corresponding sub-
paragraphs.
CTT21 LASER
TRANSMITTER
CTR21 RECEIVER
CT3675
TILT ANGLE SENSOR
CT25039
INTERNAL HEATERS
SUBASSEMBLY
CTB22 OPTICAL
SUBASSEMBLY
CT35042 STANDARD WINDOW ASSEMBLY
BATTERY 4592 AND
CT3681
BATTERY SWITCH
SUBASSEMBLY
CTP241 LINE & POWER
INTERFACE SUBASSEMBLY, AC
9412-035
DPS52
DC CONVERTER BOARD
MODEM BOARD
(OPTIONAL)
DCT51 CEILOMETER
INTERFACE BOARD
CTL21
OPTICS MONITOR
Figure 5-2 Measurement Unit Components