3S Full Face Mask – Negative Pressure
10
Use
GB
3.2
Leak Check
In order to check the mask-to-face tightness a leak test must be performed before each use.
3.3
Removing the Mask
(1)
Seal the mask connector or the inlet opening side of an
attached filter with the ball of your hand.
(2)
Test tightness by inhaling and exhaling. Whilst doing so:
when inhaling there must be negative pressure, no
inflowing air should be noticeable.
(3)
If necessary retighten the straps.
If the leak test fails the mask must not be used.
(1)
Loosen the head harness, press the buckles forwards
using your thumbs.
Do not grip the mask by the exhalation valve!
(2)
Grip the mask by the connector and pull off backwards
over your head.
