User's Manual

SBS
-
900 Shore
Ba
Ba
sed
Radar Systems
Chapter
9
:
Planned maintenance
KH
KH
-
1602 2
issue 1
:
Standard SBS900 Systems Operator & Maintenance Handbook
Page
120
of
240
9.8
Earth bonding maintenance
Where an earth
/ chassis
bonding point has been found to be corroded or fails a conductivity test, the
bonding joint should be dismantled, cleaned and reassembled as follows
:
Caution:
Isolate the system before commencing this task.
Under no circumstances should straps or
equip
ment be disconnected from earth
/ chassis
before all power supplies are
isolated
removed at
source.
Earth bonding cleaning p
rocedure
(
Fully i
solate the equipment
from the single and 3
-
phase AC power
supplies
including any UPS
supported supplies
(
Release the nuts/bolts securing the equipment/
straps.
(
Clean the affected parts with
a
wire brush or emery cloth to provide bright metal surfaces.
(
Refit the equipment/stra
ps and tighten all nuts/bolts.
(
Carry out a continuity check in accordance with
the appropriate m
aintenance
procedure
(
If the test is satisfactory, restore the equipment power supplies and test the system.
Radar Distribution Unit
(all variants)
M6 grounding/ earth stud
Gearbox
(all variants)
Grounding strap
Transceiver enclosure
(all variants)
M6 grounding/ earth stud