4. Negative Fit check
2020-10-05
OI01H-3021 SR 900
8
4.1
Install a protective
element.
Snap the pre-filter holder onto
the protective element.
Put the mask on.
4.2
Place the palm of your
hand lightly over the hole on
the pre-filter holder to make it
tight. Take a deep breath and
hold your breath for about 10s.
If the mask is tight, it will be
pressed against your face.
If any leakage is detected:
• check the exhalation membranes, exhalation valves and the gasket,
• adjust the straps of head harness,
• switch to alternative size of the respirator.
Do not use the equipment if you cannot make the mask a tight fit
during the fitting test.
Note! Beard growth, scars, or other physical characteristics may
interfere with a proper fit of the respirator.
