If you cannot achieve a proper fit, DO NOT enter contaminated area. See your supervisor.
Negative Pressure Seal Check (with 6000 series cartridges)
1. Place palms of hands to cover face of cartridge or open area of 3M™ 501 Filter Retainer, when retainer is
attached to the cartridge, to restrict air flow. (Fig. 15)
2. Inhale gently. If you feel facepiece collapse slightly and pull closer to your face with no leaks between
the face and facepiece, a proper fit has been obtained.
3. If faceseal air leakage is detected, reposition respirator on face and/or readjust tension of straps to
eliminate air leakage. Repeat above steps until a tight faceseal is obtained.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.
Note: Use of 3M 501 filter retainer may aid respirator wearer in conducting a negative pressure seal check.
Negative Pressure Seal Check (with 2000 series filters)
1. Place your thumbs onto the center portion of the filters, restricting airflow into the breathing tube of
filters, and inhale gently. If you feel facepiece collapse slightly and pull closer to your face with no leaks
between the face and facepiece, a proper fit has been obtained. (Fig. 16)
2. If faceseal air leakage is detected, reposition respirator on face and/or readjust tension of straps to
eliminate the leakage.
3. Repeat above steps until a tight faceseal is obtained.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.
Negative Pressure User Seal Check (with 7093/7093C Filters)
1. Using hands press or squeeze filter covers toward facepiece and inhale gently. If you feel facepiece
collapse slightly and pull closer to your face with no leaks between the face and facepiece a proper seal
has been obtained. (Fig. 15)
2. If faceseal air leakage is detected, reposition respirator on face and/or readjust tension of straps to
eliminate the leakage.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.
Negative Pressure User Seal Check with Dual Airline
1. Disconnect airline hose from air control valve.
2. With breathing tube still connected to the air control valve inhale gently. If you feel facepiece collapse
slightly and pull closer to your face with no leaks between the face and facepiece, a proper seal has been
obtained.
3. For Combination Dual Airline where cartridges or filters are attached perform user seal check as
described above under the appropriate cartridge or filter that is being used.
4.
If faceseal air leakage is detected, reposition the respirator on your face and/or readjust the tension of the
straps to eliminate the leakage and recheck seal.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.
Note: Before assigning any respirator to be worn in a contaminated area, a qualitative or
quantitative fit test must be performed per OSHA Standard 1910.134 or CSA Standard Z94.4.
FIT TESTING
The effectiveness of a respirator will be reduced if it is not fitted properly. Therefore, either quantitative or
qualitative fit testing must be conducted prior to the respirator being issued. Note: Fit testing is a U.S.
Occupational Safety and Health Administration (OSHA) and Canadian CSA requirement.
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