Vaisala LT31 - Measurement and Interface Units

User's Guide ______________________________________________________________________
32 __________________________________________________________________ M210667EN-C
Measurement Unit
The measurement unit (see Figure 6 below) consists of the following
parts:
- Measurement head enclosure with a cover and air duct
- Window heater
- Optics unit with
- Measurement CPU board (including a window receiver)
- Window transmitter module
- Main transmitter module for the transmitter measurement head
or main receiver module for the receiver measurement head
- Optics tube
- Alignment mechanism
0401-022
Figure 6 Measurement Unit
The following numbers refer to Figure 6 above.
1 = Optics unit
2 = Enclosure
3 = Windows
For the parts inside the measurement unit, see Figure 7 on page 33.