Leak Tests - Dräger X-plore 3350 Instructions For Use Manual

Use
6. As shown in Figure F, hold and draw the upper straps upwards at
a certain angle to tighten the upper and lower straps uniformly. If
the upper straps get loose after adjustment, tighten the straps
again as mentioned above. Fine-tune the straps repeatedly until
the mask rests against your face tightly and comfortably.
7. Carry out a leak test.
3.4

Leak tests

WARNING
!
The half mask may not fit correctly over facial hair or features
– danger of injury or death!
The half mask must fit tightly. In case leak occurs during the
test, don't enter the contaminated area.
NOTICE
i
i
The pad cap of pad-particle filters does not provide an airtight
seal for the gas filter and/or the pad plate. Thus, it is necessary
to carry out the positive pressure test for pad-particle filters.
3.4.1 Negative pressure test
Seal both respiratory filters with your hands or an aid (e.g. a piece of
cardboard) and breathe in until a negative pressure is created (see
Figure G). Hold your breath for a moment. 
The negative pressure should be maintained. If not, adjust the
harness.
3.4.2 Positive pressure test
Seal the exhalation valve of the half mask and breathe out forcefully
(see Figure H). 
The half mask must NOT lift off your face. If the exhaled air dissipates
between face and mask body, adjust the harness.
12 Dräger X-plore 3350/3550