Vaisala LT31, Руководство пользователя, Страница: 124 / 294

User's Guide ______________________________________________________________________
124 _________________________________________________________________ M210667EN-C
Mounting Optional Obstruction Light LT31OBS
1. Place the ladder behind the receiver mast.
2. Then follow the instructions in section Mounting Optional
Obstruction Light LT31OBS on page 112.
Mounting Receiver Measurement Unit
CAUTION Before the measurement unit can be installed, the transportation lock for
the optics unit must be removed!
1. Open the measurement unit carefully. Loosen four hex-socket
screws size 5 and remove the cover with air duct. See Figure 72 on
page 115.
2. Carefully cut the transportation lock and remove it from the
measurement unit. Do not damage any of the module cables! See
Figure 73 on page 115.
3. Finally remove the transportation lock warning sheet and close the
measurement unit carefully. Pay attention to the position of the
cover seal.
4. Place the ladder to the side of the receiver mast. Select the side
where the protection hood points left.
5. Loosen the two fastening screws at the side of the measurement
unit flange (hex-socket, size 4). See Figure 74 on page 116.
6. Place the measurement unit on top of the inner mast tube (windows
pointing left). Do not use the air duct on top of the unit as a handle,
carry the measurement unit at the enclosure sides! Be aware of the
connection cable to be routed below the small junction box near the
blower.
7. Make sure that the measurement unit has completely settled on the
inner mast tube of the receiver mast. The air duct inlet on top of the
measurement unit must be placed in the same level than the outlet
of the blower. See Figure 75 on page 116.
8. Turn the measurement unit roughly into a parallel position with the
support unit (housing edges parallel to support unit outline). The
measurement unit must have a distance of approximately 8 mm to
all surrounding support unit parts. See Figure 76 on page 117.
9. Connect the measurement unit cable plug with the cable socket
from the support unit. Place the connectors at the rear of the
support unit right hand from the small junction box. See Figure 77
on page 117.
10. Place the ladder behind the receiver, check the parallel position
again and tighten the fastening screws (hex-socket, size 4) on the