Fittesting; Suser Sealchecks; Respirator Description - North 7190N99 Guide D'utilisation Et D'entretien

46000532RB.5182 12/20/01
1.1.5 FIT TESTING
Arespirator should not be assigned to a person unless the person is given a
qualitative or quantitative respirator fit test and the results of the test indicate
that the facepiece of the respirator fits properly.
Fit tests should be conducted at least annually and more frequently if there are
factors such as weight change or dental surgery which may affect the fit of the
respirator.
Instructions for carrying out qualitative and quantitative respirator fit tests are
given in publications such as ANSI Z88.2-1992, and respirator manuals pub-
lished by government agencies such as NIOSH, ERDA, and NRC.
USER SEAL CHECKS (Facepiece-to-Face Seal Checks)
Each time that the respirator is put on and before each entry into a contami-
nated atmosphere, as well as periodically while wearing the respirator in the
contaminated area, the respirator wearer should check the effectiveness of the
seal of the facepiece to the wearer's face by carrying out a positive pressure
seal check. Instructions for carrying out a positive pressure seal check on this
respirator are given in the section of this manual titled TO PUTON THE RES-
PIRATOR.

RESPIRATOR DESCRIPTION

This device is an air-purifying respirator consisting of a half mask facepiece
assembly and a replaceable filter which provide respiratory protection against
hazardous particulate matter. Other than filter replacement, no other mainte-
nance can be performed on this respirator. The entire respirator must be
replaced when soiled or damaged.
When the respirator wearer inhales, the contaminated air is drawn through the
air-purifying filter, which removes the hazardous particulate matter from the air
before it enters the lungs. During inhalation, the inhalation valve in the face-
piece opens and the exhalation valve closes to prevent contaminated air from
entering the facepiece. During exhalation, the exhalation valve opens and the
inhalation valve closes to prevent exhaled air from passing back through the
air-purifying filter.
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