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 91 of 240
SBS-900 Annual planned maintenance record sheet
Inspection sheet
4 of 10
Radar Distribution unit (RDU)
Task Description Pass Fail
Cleaning
External
surfaces
Clean with a soft, non-abrasive cloth moistened in a mild
soap solution.
' '
Internal
surfaces
Open the door of the Radar Distribution Unit using a
screwdriver. Carefully clean out the unit using blower
and
/ or
soft brush.
' '
Physical
inspection
External
Ensure that all mounting bolts are secure. ' '
Ensure all connectors are securely in place; inspect
internal cabling for condition and wear.
' '
Check that all air vents are clear of obstructions and
dust.
' '
Internal
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inspect internal cabling for condition and wear.
' '
Check that all air vents and fans are clear of obstructions
and clear of dust accumulation.
' '
General
The system should be checked to ensure that there is no
obvious internal, external damage or potential fault
conditions that could lead to a general failure of any part
of the system.
' '
Earth
bonding
and
continuity
On the underside of the RDU, visually inspect the earth terminal for
damage and corrosion.
If corrosion is present, clean and re-terminate as described in section
9.7 page 114.
' '
Check that the earth bonding strap between the RDU door and
chassis 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
note1
to earth/ chassis and the other to an unpainted part of
the equipment under test.
Check the earth bonding for continuity, the resistance should not
exceed 0.1 ohms. If a test fails, investigate the bonding, rectify and
repeat the test.
Note
1
: Safety ohmmeter, bridge Megger or Multimeter.
' '