Vaisala LT31, Руководство пользователя, Страница: 77 / 294

Chapter 4 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 77
NOTE If there is a junction box installed, the cable shield should be grounded
at both the input and output cable glands.
Detailed instructions for a proper RF-grounding of any jacketed cables
are given in the following:
1. Lead the signal cable through the cable inlet. See Figure 35 below.
2. Strip 50 cm of the cable sheath leaving approximately 2 cm of
shield.
3. Remove the cap of the cable gland, including the plastic cylinder.
Slide the cap with the plastic cylinder onto the cable.
4. Add shrinkable tubes to increase the cable diameter of thin cables
(diameters less than 5 mm).
5. Slide the plastic cylinder to the edge of the cable sheath. Turn the
cable shield over the cylinder; see Figure 35 below.
6. Tighten the cable with the cable gland and proceed with the wiring.
7. Ground the signal cable with the same method at both ends.
8. Wire the communication cable according to the instructions in
section Communication Options on page 78.
0201-070
Figure 35 Cable Grounding Instruction
The following number refers to Figure 35 above.
1 = Cable
shield
NOTE Cables with diameters more than 15 mm require a separate junction box.
Vaisala TERMBOX-1200/TERMBOX-9000 is recommended.