User Seal Checks; Fit Testing; Inspection Procedure - 3M 7500 Serie Instrucciones

4. Perform a positive and/or negative pressure user seal check each time the respirator is donned.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.

User Seal Checks

Always check the seal of the respirator on your face before entering a contaminated area.
Positive Pressure User Seal Check
1. Cover the opening in exhalation valve cover with hand and exhale gently (Fig. 14). If facepiece bulges slightly and no air leaks are detected between
your face and facepiece, a proper seal has been obtained.
2. If faceseal air leakage is detected, reposition respirator on your face and/or readjust tension of the elastic straps to eliminate leakage and recheck
seal.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.
Negative Pressure User Seal Check (with 6000 Series Cartridges)
NOTE: Use of 3M™ Filter Retainer 501 may aid respirator wearer in conducting a negative pressure user seal check.
1. Place palms of hands to cover face of cartridge or open area of 3M™ Filter Retainer 501 *(07054), 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 seal has
been obtained.
3. If faceseal air leakage is detected, reposition respirator on face and/or readjust tension of straps to eliminate air leakage and recheck seal.
If you cannot achieve a proper seal, DO NOT enter contaminated area. See your supervisor.
Negative Pressure User 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 seal 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 and recheck seal.
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. 25).
2. If faceseal air leakage is detected, reposition respirator on face and/or readjust tension of straps to eliminate the leakage and recheck seal.
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 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
29 CFR 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 and used.
NOTE: Fit testing is a U.S. Occupational Safety and Health Administration (OSHA), a Canadian CSA and a Brazilian BMOL requirement.
Quantitative Fit Testing
Quantitative fit testing (QNFT) can be conducted with a 3M™ Fit Test Adapter 601 and P100 filters such as the 3M™ Particulate Filters 2091 or 7093.
Qualitative Fit Testing
Qualitative Fit Testing (QLFT) can be conducted with any approved particulate filters. The FT-10 (sweet) or FT-30 (bitter) QLFT fit test can be utilized to
conduct the fit testing.
Respirators should also be fit tested while wearing any personal protective equipment (PPE) the wearer may use in their work environment that may
affect the fit of the respirator (e.g. hoods, hardhats, safety glasses, hearing protections, etc.).
NOTE: For further information concerning fit testing, contact 3M Technical Service at 1-800-243-4630 or a 3M location in your region. In Canada call
Technical Service at 1-800-267-4414.
INSPECTIONS, CLEANING AND STORAGE

Inspection Procedure

This respirator must be inspected before each use to ensure it is in proper operating condition. Any damaged or defective parts must be replaced
before use. The following procedure is recommended:
1. Check the facepiece for cracks, tears and dirt. Examine the inhalation valves for signs of distortion, cracking or tearing.
2. Check that the head straps are intact and have good elasticity.
3. Examine all plastic parts and gasket areas for signs of cracking or fatiguing and replace if necessary. Remove the exhalation valve cover and
examine the exhalation valve and seat for signs of dirt, distortion, cracking, or tearing. Replace the valve if necessary. Secure the valve cover prior
to use (Fig. 17).
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