FIT TESTING PROCEDURE
P/N 595390-01 Rev B 201910 29
Fit test exercises must be performed as if the respirator is being used in a hazardous atmosphere. Users must not
bump the facepiece, filter, or adapter into the body through exaggerated motions. Users must not talk except when
directed to by the test administrator.
3M requires that users of 3M Scott Fire & Safety respirators and facepieces must achieve a fit factor of at least 500
for CBRN SCBA (Open Circuit) use or at least 2000 for CBRN APR use with their assigned facepiece style and size
using the fit test procedures and exercise regimen stated above. If a fit factor of at least 500 for CBRN SCBA (Open
Circuit) use or at least 2000 for CBRN APR use cannot be achieved with any facepiece size or style, the user must
not use this respirator.
If the respirator user passes a negative pressure leak test but does not pass a respirator quantitative fit test, try the
next nearest size, larger or smaller and repeat the negative pressure leak test and the quantitative fit test. If an air leak
is still detected, either per these user instructions or the OSHA fit testing process, the use of Mask Seal Kit P/N
805655-01 may be required to attain a proper fit. Refer to the Mask Seal Kit Installation and Use Instructions (P/N
89462-01) included with the Mask Seal Kit. After installing the Mask Seal Kit, repeat the fit testing process to confirm
a proper fit. If an air leak is still detected, do not use the respirator.
Routine Testing
Once the proper size is selected and assigned to the user following successful Portacount Respirator Fit Tester testing
to achieve minimum fit factors required, the respirator user must perform and pass a negative pressure leak test every
time the facepiece is donned to ensure proper fit before using the respirator in a hazardous atmosphere.
A respirator Quantitative Fit Test must be routinely carried out as outlined above for each user of this respirator to
determine or confirm the amount of protection that the respirator provides. Periodically repeating the fit testing is
required to identify any physical changes of the user that could affect the fit of the facepiece.
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