User's Manual

SBS-900 Shore Based Radar Systems
Chapter 9: Planned maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 93 of 240
SBS-900 Annual planned maintenance record sheet
Inspection sheet
6 of 10
Transceiver enclosure
Task Description Pass Fail
Base
plate air
baffle
The air baffle plates located on the base of the Transceiver Enclosure
should be checked and cleaned as necessary.
Base of DTX-A7 Transceiver Enclosure
Each baffle is retained by 4 cross-head screws as indicated above.
' '
The plates should be removed and any dust or
foreign objects removed from the plate and the
heatsinks above using a brush or blower.
If necessary, the ducted fans on the top of the unit
can also be removed to assist in cleaning the
heatsink void.
These are retained by two crosshead screws at
either end of the enclosure.
Side view of DTX-A7
Earth
bonding
and
continuity
Ensure that the earth bonding nuts and bolts are tight and free from
corrosion.
If corrosion is present, clean and re-terminate as described in section
9.7 page 114.
' '
Test the earth bonding conductivity by attaching one lead of the test
equipment
note
to earth/ chassis and the other to an unpainted part of
the equipment under test.
Check earth bonding for continuity, the resistance should not exceed
0.1 ohms. If a test fails, investigate the bonding, rectify (see section
9.7 page 114) and repeat the test.
Note: Safety ohmmeter, bridge Megger or Multimeter.
' '