3.1.2.2
POSITIVE PRESSURE FIT CHECK
Using the palm of a hand to close the openings
in the exhalation valve guard, simultaneously
exhale. If the facepiece bulges slightly and no
air leaks between the facepiece and the face
are detected, an effective fit has been
obtained. If air is detected to be leaking out
between the facepiece and the face, reposition
the facepiece on the face and/or readjust the
tension of the headbands to eliminate the leak-
age. This check must be repeated until an
effective seal of the facepiece to face is
obtained (See Figure 10).
4. USE
You are now ready to enter the use environment for which the respira-
tor is intended.
WARNING
4.1 SERVICE LIFE
The service life of this respirator will vary depending on the work envi-
ronment.
4.1.1 GAS FILTERS
When you are using gas or vapour filters which do not have end-of-
service-life indicators, you will know the service life is ending when
Immediately leave the work area and replace the respirator if;
i.
breathing becomes difficult;
ii. dizziness or other distress occurs,
iii. you smell, taste or sense irritation from the contaminants
in the work area, or
iv. the respirator becomes damaged.
Should any of these occur, you risk exposure to hazardous quan-
tities of the air contaminant which can result in serious injury or
death.
FIGURE 10
Positive Pressure
Fit Check
11
GB
