3M 7907S Mode D'emploi page 123

combination with a pair of approved 3M filters to form a
filtering apparatus for respiratory protection.
Such apparatus is designed to remove potentially
harmful particulates from the surrounding atmosphere.
This apparatus may also be used as a system with the
3M Air Supply Units.
PREPARATION FOR USE
Inspect the package contents for shipping damage and
ensure all components are present.
Check apparatus is complete, undamaged and
correctly assembled. Any damaged or defective parts
must be replaced with original 3M spare parts before
use.
Inspection
The following inspection procedure is recommended
before use:
1. Check the face piece for cracks, tears and dirt. Be
certain the face piece, especially the face seal area, is
not distorted. The material must be pliable – not stiff.
2. Examine the inhalation valves for cracks or tears. Lift
valves and inspect valve seat for dirt or cracks.
3. Ensure that the head straps are intact and have good
elasticity.
4. Examine all plastic parts for signs of cracks or fatigue.
5. Make sure all gaskets are properly seated.
6. Remove the exhalation valve cover and examine the
exhalation valve and valve seat for signs of dirt,
distortion, cracks or tears. Replace the exhalation valve
cover.
7. Inspect lens for any damage that may impair
respirator performance or vision.
ASSEMBLY INSTRUCTIONS
See appropriate User Instructions for assembly
instructions (e.g. 3M™ Filter/3M™ Air Supply Unit).
FITTING INSTRUCTIONS
Fitting Instructions must be followed each time the
product is worn.
DONNING
1. Fully loosen all 6 headstraps, then place harness on
the back of the head and pull the facepiece down over
the face (Figure 2).
2. Pull the ends of the 6 straps to adjust the tightness,
starting with the neck straps first, followed by the temple
straps.
Do not overtighten.
3. Perform a positive and/or negative pressure face fit
check.
The Negative Pressure Fit Check is recommended
when using the 3M™ 6035 and 6038 or 2000 Series
filters, whereas the Positive Pressure Fit Check is
recommended when using other 3M filters.
DOFFING
Do not remove the face piece, filters or turn off the
air supply until you have vacated the contaminated
area.
1. Release the tension on the head straps.
2. Carefully lift face piece off the face and remove the
respirator by lifting up and away from the face. See
Figure 6.
FIT CHECK
• Positive Pressure User Seal Check (for all
approved configurations)
(all Filters except 3M™ 6035 /6038/ 2000 Series
Filters).
Place palm of hand over exhalation valve cover and
exhale gently.
If the facepiece bulges slightly and no air leaks are
detected between the face and the facepiece, a proper
seal has been obtained.
If an air leak is detected, reposition the respirator on the
face and / or re-adjust the tension of the elastic strap to
eliminate the leakage.
Repeat the above fit check.
• Negative Pressure User Seal Check with 6035 /
6038 Filters
Also 2000 Series filters.
Press your thumbs into the central indentation of the
filters (2000 Series), or press filter cover and filter body
together (6035/6038), inhale gently and hold your
breath for ten seconds
If the face piece collapses slightly a proper fit has been
achieved.
Figure 3. Figure 4.
If an air leak is detected, reposition the respirator on the
face and / or re-adjust the tension of the elastic strap to
eliminate the leakage.
Repeat the above fit check.
If you CANNOT achieve a proper fit DO NOT enter
the hazardous area.
Quantitative Fit Testing
For information regarding fit testing procedures, please
contact 3M.
MAINTENANCE
Maintenance, servicing and repair must only be carried
out by properly trained personnel.
^ {Insert warning triangle}Use of unapproved
parts or unauthorized modification could result in
danger to life or health and can invalidate any
warranty.
General inspection must be carried out before use or
monthly if not in regular use. See Inspection procedures
for specific details.
SPARE PARTS
Lens Assembly (7927) Replacement.
Remove the two screws holding the lens frame together
and remove the two halves of the lens frame.
Roll back facepiece from the edge of the lens and
remove the lens. To replace, align the centre of the lens
with the centre line of the facepiece.
The centre of the lens is marked by two small dots, one
at the top centre and a second at the bottom centre.
Place the lens into the facepiece, then re-attach the
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