
SR900 — How to
Copyright © 2016 by The S.E.A. Group
4
Fit a pre-filter
IMPORTANT
:
A pre-filter should ALWAYS be attached to the
front of any main filter, whether a particle or a
gas filter.
Place a pre-filter in the pre-filter holder.
Snap the pre-filter holder with the pre-filter onto
the front of the main filter.
Check for leakage
Make sure the mask is completely assembled
with all parts intact, including filter, pre-filter and
pre-filter holder
Fit the respirator on your face.
Cover the centre hole in the pre-filter holder
with the palm of your hand.
Breathe in and hold your breath for about ten
seconds.