Vaisala LT31 - Figure 13 Measurement Unit; Measurement Unit LTM112;212

Chapter 3 ______________________________________________________ Functional Description
VAISALA _______________________________________________________________________ 47
Measurement Unit LTM112/212
The measurement unit of the LT31 transmitter unit is named LTM112
and consists of the following:
- Measurement enclosure with cover and air duct
- Window heater
- Transmitter optics unit (main transmitter module, window transmitter
module, and measurement CPU board including window receiver)
The measurement unit of the LT31 receiver unit is named LTM212 and
consists of the following:
- Measurement enclosure with cover and air duct
- Window heater
- Optics unit with optics tube, alignment mechanism, main receiver
module, window transmitter module, and measurement CPU board
(including window receiver)
Measurement unit is shown in Figure 13 below.
0912-231
Figure 13 Measurement Unit
The following numbers refer to Figure 13 above.
1 = Air duct
2 = Measurement enclosure
3 = Fastening screws