5. Mask
– Tightness check
2020-10-06
OI03H-1021 SR 200 Airline
10
Check the fit of the mask if you intend to use a back-up filter.
If any leakage is detected, check the inhalation and exhalation valves
or adjust the straps of head harness. Repeat the fit check until there
is no leakage.
Leakage may occur in cases such as if you wear a beard or
sideboards or if your face is unshaven or deeply wrinkled, if you wear
glasses, or if the exhalation valves are defective or dirty.
5.1
Blank off the filter by
using the sealing cover.
5.2
Draw a deep breath and
hold your breath for ten
seconds.
If the fit is good, the mask will
be pressed against your face.
