The straps should not be pulled so tight
that the respirator digs into your face. Be
careful not to over-tighten.
a. Adjust the cradle
head straps and
the neck strap. If
the fit is too tight
unlock the strap
by pulling back
on the tab on the
latch. Then, pull
to desired com-
fort.
TEST FOR TIGHTNESS
Test for Tightness Before Each Use By One
of the Following Methods:
•
Negative Pressure Method — Place your
palms over cartridges lightly. Gently
inhale so that the facepiece collapses
slightly and hold breath for ten seconds.
The facepiece will remain collapsed while
the breath is held unless there is a leak in
the seal.
•
Positive Pressure Method — Place your
palm lightly over exhalation valve cover
and gently exhale.
If any leakage is detected around the facial
seal, readjust head harness straps and repeat
test until there is no leakage. If other than
facial seal leakage is detected, the condition
must be investigated and corrected before
another test is made. The respirator must
pass one of the above tightness tests before
the respirator is used.
Do not enter any atmosphere with this res-
pirator unless you know that:
1. You have read, understood and fol-
lowed all instructions and warnings
pertaining to the respirator.
2. The respirator and conditions meet the
requirements outlined.
3. The cartridges are the proper type for
the contaminant or contaminants pre-
sent.
4. The amount of oxygen is sufficient to
support life (that is, at least 19.5 per-
cent oxygen by volume at sea level). Do
not use if oxygen concentration suffi-
cient to support life is questionable.
5. Respirator has passed a tightness test.
(See Test for Tightness.)
6. Filters/Cartridges do not need to be
replaced. Discard exhausted car-
tridges.
7. You are not colorblind and can distin-
guish between the beginning and end-
ing colors of the end-of -service-life
indicator (when using Mersorb or
Mersorb-P100 respirators only).
Failure to follow the above warnings can
result in serious personal injury or death.
To replace cartridges:
A. Remove the expended cartridges and
dispose of properly.
B. Remove the replacement cartridges from
storage bags.
C. Place cartridges on
connectors carefully.
Line up match-mark
on cartridge with
small lug on face-
piece
connector.
Make sure cartridge
connector lugs align with the cartridge
opening. Push down and tighten car-
tridge clockwise until the stops are
engaged. To ensure a good seal against
the facepiece, tighten each cartridge by
gripping as much of the circumference of
the cartridge as possible and then slowly
turning the cartridge until tight.
To replace snap-on filters:
A. Remove snaptight filter covers and dis-
6
NECK STRAP LOCK
ADJUST THE STRAPS
OBTAIN A COMFORTABLE FIT
NEGATIVE PRESSURE METHOD
POSITIVE PRESSURE METHOD
WARNING