TSI Incorporated PORTACOUNT PRO+ 8038, Руководство по эксплуатации и обслуживанию

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40 Chapter 4
Common Problems Resulting in Low Fit Factors
Some of the most common problems that result in lower than
expected fit factors are described below
. Assuming the PortaCount
Pro fit tester passes the Daily Checks , explore the following
possibilities.
Not using high
efficiency filters If high-efficiency class-99 or class-100
filters (P3 for non-USA users) are not
being used on the respirator, you may
never get a high fit factor. Filters such as
class-95. P1 and P2 (for non-USA users)
allow some ambient air particles to get
through and be interpreted as face seal
leakage by the PortaCount Pro Respirator
Fit Tester.
Note : The Model 8038 fit tests lower
efficiency respirators including
class-95, P1, and P2 filtering-
facepieces (disposables).
Alcohol cartridge is
not tightly inserted
or an O-ring is
missing Make sure the alcohol cartridge is installed
properly and all O-rings are in position.
Starting fit test too
soon after mask is
donned. When the mask is first donned, ambient air
particles are trapped inside. These
particles clear out as the person breathes.
According to all fit testing protocols, a fit
test subject must wait 5 minutes after
donning the mask before beginning the fit
testing exercises.
Sample tubes too
long No more than the few inches should be
added to the Sample tube (use a Tube
Adapter). Longer sample tubes prevent
proper purging between the ambient and
mask sample.
Leaking respirator
probe or fit test
adapter Make certain the respirator probe (if used)
or fit test adapter does not leak around the
outside.
PortaCount Pro fit
tester sample tube
leaks where attached
to probe or adapter
due to wear Cut a short piece off the end of the tube to
expose a fresh end.