Appendix 3
476
Issue date: 17 November 2006
68 of 80
BREATHE DOWN SEQUENCE
EV
CHECK IN ORDER
P
NYP
29
OPEN
the cylinder valve
SLOWLY
and
FULLY
.
30
DISCONNECT
neck loop
retaining stud,
WIPE
the face mask seal and inner mask with a damp PALTECH wipe.
DON
face mask, drop the head forward into the face mask placing the chin firmly into the chin
cup.
POSITION
the head harness over the head, locating the harness centre plate square on the
back of the head. Ensure that hair does not compromise the face seal area.
ADJUST
the straps, lower two first, then middle two and top one (if required).
BREATHE
normally.
31
TEST
the
constant flow of air to face mask by briefly operating the additional flow button on the
front of the LDV once only.
32
TAKE
a deep breath and hold, do not move head.
LISTEN
for any leakage from the face mask for approximately
8 seconds
and then,
BREATHE
normally.
33
TAKE
a deep breath and hold,
CLOSE
the cylinder valve;
continue
to hold onto the valve
.
34
TAKE HOLD
of the Bodyguard in other hand and
OBSERVE
display for approximately
8 seconds
whilst slowly moving your head
up, down and side-to-side.
ENSURE
the face mask is not leaking outwardly (positive pressure).
This will be noted by an excessive fall in pressure.
35
After
8 seconds
slowly
BREATHE DOWN
the contents.
36
OBSERVE
and
LISTEN
to the low pressure warnings
:
The electronic
low pressure warning and the
red
and
blue
LEDs flashing (operates at
84 bar).
The pneumatic low pressure warning (operates at 74 bar +/- 5 bar).
Note: both must be heard to actuate.
37
When zero is displayed (0 bar):
OPEN
the cylinder valve
SLOWLY
and
FULLY
and breathe normally.
NOTE
pressure displayed and round down for entry onto the BA tally at EV43.
38
TAKE
a deep breath and hold,
CLOSE
the cylinder valve;
continue
to hold onto the valve
.
39
BREATHE
steadily until the air is exhausted (0 bar displayed) and the face mask collapses onto
your face.
