Vaisala LT31, Руководство пользователя, Страница: 140 / 294

User's Guide ______________________________________________________________________
140 _________________________________________________________________ M210667EN-C
Finalizing Installation
After all the installation steps have been proceeded and the fine-
alignment as well as the calibration have been carried out successfully,
the LT31 system can be finally prepared for operational use. When the
fastening screws for support units and measurement units are carefully
fixed, the measurement head covers can be installed to LT31 receiver and
transmitter.
Mounting Measurement Head Cover
When the measurement head cover is attached to the support unit, a
special fast locking mechanism is utilized to secure the hood in its
intended position using six lock screws. These screws are equipped with
an ejector spring in order to achieve easy removal of the measurement
head cover. The placement of the screws is indicated in Figure 95 below.
0904-025
Figure 95 Lock-Screws at Measurement Head Cover
The counterpart of the lock screws are part of the support unit and the
lock screws can be fastened by a quarter turn using a suitable
screwdriver. One of the receptacles inside the measurement head cover is
shown in Figure 96 below.
0905-016
Figure 96 Receptacle Inside the Measurement Head Cover