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 95 of 240
SBS-900 Annual planned maintenance record sheet
Inspection sheet
8 of 10
Powered tests: Safety switch tests
The following tests should be carried out with power restored to the system.
Caution: When carrying out the following test, do not contravene any health and safety
precautions regarding working aloft, antenna or electrical safety.
The following tests will Stop and Start antenna rotation and system transmission. The area around
the antenna must be kept clear at all times during these tests.
Task Description Pass Fail
Antenna
Rotation
keyswitch
(RDU)
- Set the system to RUN so that it is transmitting and the antenna
is rotating.
- Place the Antenna Rotation keyswitch (located on the door of
the Radar Distribution Unit) into the OFF position.
Remove and RETAIN the key.
- The yellow LED on the front panel of the Radar Distribution Unit
will flash.
- Ensure that the system has stopped transmitting, that antenna
rotation has stopped and that the appropriate system alarms are
generated.
' '
Man aloft
switch
(MAS)
- Where safe to do so, change the Man Aloft switch to the OFF
position.
- Reinsert the key into the Antenna Rotation Keyswitch and set to
FREE.
- As the Man Aloft Switch is OFF the system should not transmit
and the antenna rotation should not rotate.
- Place the Antenna Rotation keyswitch back to the OFF position.
Remove and RETAIN the key.
' '
Man aloft
switch
& Antenna
Rotation
keyswitch
- Change the Man Aloft switch to the FREE position.
- Reinsert the key into the Antenna Rotation Keyswitch and set to
FREE.
- Ensure system transmission and antenna rotation commence.
' '
Hut door
switch
Where fitted
- Open the hut door.
- Ensure the appropriate system alarm is generated at the RDU.
- Close the HUT door.
' '
Not fitted '
Antenna
platform
switch
Where fitted
- Where it is possible and SAFE to do so, open the antenna
platform access door.
- Ensure the appropriate system alarm is generated at the RDU.
- Close the antenna platform access door.
' '
Not fitted '