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Issue date: 17 November 2006
22 of 80
Low pressure warning
12.20
The electronic low pressure warning will sound at 84 bar. This indicates the start of the 12 minute
safety margin for SDBA and 18 minute safety margin for EDBA.
12.21
The pneumatic low pressure warning whistle will sound at 74 bar (+/- 5 bar). This indicates that
10 minutes of the safety margin remains for SDBA and 16 minutes remain for EDBA.
13
Bodyguard electronic monitoring unit self-check
13.1
The ‘self-check’ can be performed without the system pressurised.
Note
:
during ‘self-check’, a power on phase and battery check is
simultaneously performed – if the battery voltage is below the programmed
minimum power on value of 5.0 volts, then the ‘low battery’ icon will be
displayed and then the system will switch ‘off’. Investigate why the ‘low battery’
icon is being displayed i.e. not connected to charging lead. If BA set fails to
charge remove the set from service and return to OSG (see image right).
13.2
Press and hold the
left
button of the Bodyguard unit and continue holding
until the ‘return arrow’ icon appears. The unit will emit a single audible ‘bleep’,
and then the ‘self-check’ sequence will start (see image right).
13.3
The initial short first display (see image right).
13.4
Quickly changes to the full ‘LCD check’ icon (see image right).
13.5
The display backlight will momentarily illuminate and the blue, red, and single
green
LEDs in the lower display cluster will also momentarily illuminate (see
image right).
13.6
During each sequence the outer radial segments will initially illuminate and
then switch off segment by segment from the left (clockwise).
13.7
When all the segments have disappeared, the display will change to ‘leak test’
icon (see image right).
13.8
When all the segments have disappeared, the display will change to ‘reduced
volume’ icon (see image right).
13.9
When all the segments have disappeared, the display will change momentarily
to ‘ADSU not active’ icon (see image right).
