North 7190N99 Guide D'utilisation Et D'entretien page 9

46000532RB.5182 12/20/01
3. Position the facepiece so that the nose section rests as low on the bridge
of your nose as is comfortable, and adjust the upper headband on each
sides just tight enough so that the respirator doesn't slide down on your
nose. Do not over tighten. If the respirator pinches your nose, loosen
the upper headband slightly. Adjust the lower headband on each sides
just tight enough to secure the respirator under your chin. (See Figure 2).
For proper positioning and comfort, the headbands should be adjusted
equally on both sides of the respirator, the upper headband should be
adjusted first, then the lower headband.
4. If you previously removed your eyewear, put it back on at this time.
5. Conduct a positive pressure user seal check as follows:
To conduct a positive pressure seal check, block the opening in the exhalation
valve guard using the palm of your hand and exhale slightly. If the facepiece
bulges slightly and no air leaks between the facepiece and your face are
detected, an effective seal has been obtained. If air is detected to be leaking
out between the facepiece and your face, reposition the facepiece on your face
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FIGURE 2
Adjusting the Headband
NOTE
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