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3. PRE-USE CHECKS
3.1 FACEMASK
1. Remove the Visorguard and store
carefully for re-use later. Check that the
mask is clean and that visor is clear and
undamaged.
2. Slacken the facemask head
harness fully and check for damage.
3. Withdraw the DV locking catch, turn
the DV through 90
o
clockwise and
withdraw the DV from the facemask.
4. Check O-ring on the demand valve
is in good condition and attach the DV to
the facemask.
5. Twist the DV to check that the
locking catch has locked the DV to the
facemask.
6. Check that the bypass knob is in
the OFF position.
7. Reset the DV first breath
mechanism by pressing the black rubber
reset button.
WARNING:
When using with a facemask fitted
with a filter and breathing from an
airline, a filter cover or blanking plug
must be place to ensure that the first
breath mechanism will activate.
8. Check that the O-ring on the
blanking plug is in good condition.
9. Screw the blanking plug to the
facemask.
10. If using the facemask fitted with a
filter, check that the filter is suitable for
the workplace hazard and within its use-
by date (see filter label).
11. Check that the cord from the filter
cover is around the filter connector.
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