M-985 Headgear-Mounted Earmuff Assembly (For Use With M-100/M-300) - 3M Versaflo M Serie Manual De Instrucciones

M-985 Headgear-Mounted Earmuff assembly (for use with M-100/M-300)

The earmuff kit is an optional accessory for the M-100 and M-300 Series Headgear. The earmuff kit
cannot be used with the M-400 Series Helmets. The earmuff kit is fully assembled. The orange cups
are attached to wires and the wires are attached to black plastic attachment mounts. A set of screws
is included to attach the mounts to the headgear shell.
To attach the earmuffs to the M-100 or M-300 Headgear:
– Inspect the black plastic earmuff mounts and locate the "X" and "O" molded into the plastic. There
is a left side and right side mount (earmuff). As worn, the mount with the "X" on it should be on the
right side of the headgear and the mount marked with an "O" should be on the left side (i.e. "X" on
the right, "O" on the left). Fig. 22a depicts the location of the "X" and "O" markings on the mount.
note: On the M-100 Series Headgear only, the "X" and "O" markings on the inside of the
headgear shell used to assist with installing the faceshield head inserts can also be used
as in indicator for earmuff attachment. Match the marking on the earmuff mount with the
corresponding marking on the M-100 shell (i.e. match "X" to "X "). See Fig. 22b. There are
no "X" and "O" markings on the inside of the M-300 Series Headgear.
– Locate the earmuff attachment points on the outside of the headgear shell (Fig. 22c & d). Note on
the M-300 Series Headgear there are visible indents on the outside of the shell where the earmuffs
attach. On the M-100, the indents may not be as visible on the outside of the shell.
– Use a pen or a screw diver to gently push on the screw attachment points to start the hole (i.e.
make an indent). This will make it easier to thread the screws into the shell.
– Insert a screw into one of the holes in the mount and thread into the indentation on the headgear
shell using a screw driver. Tighten until screw is flush to the mount and threaded in tight. Repeat
procedure with second screw.
– Test mount connection to the shell by trying to wiggle the mount. If it moves or wobbles, further
tighten screws. The mount should be snug to the headgear shell.
– Attach the second mount to the other side of the headgear following the same procedure.
Fig. 22a
Fig. 22c
Fig. 22b
Fig. 22d
24
Fig. 22e
The earmuffs can be placed in three positions:
– Usage: When in use, the wire bands must be pushed fully inward toward your head until you hear a
"click" (Fig. 22f). The cup cushions must fully enclose the ears and seal tightly against the head. For
best attenuation performance, pull hair back from under the ears so that the cups sit close on the
head.
– Standby: Wire bands may be pulled outwards until you hear a "click" indicating a shift from usage
to standby.
– Parked: Cups may be rotated out of the way onto the top of the headgear (Fig. 22g) if the headgear
shell is clean and free of contamination. Care should be taken to ensure the ear cushions stay
clean.
note: When the headgear is not being used, store with earmuffs rotated to "Usage"
position. Do not store on top of headgear in "Parked" position or "Standby" position. Keep
earmuffs clean and dry.
Fig. 22f
Review product packaging prior to use for additional information including the noise reduction rating
(NRR) and attenuation data.
Fig. 22g
25