62 Chapter 6
In the USA, OSHA requires a minimum fit factor of 100 for half
respirators and 500 for full-face respirators. If necessary, consult the
appropriate regulation or standard in your country or geography.
If the test was a Pass, the fit test is over. Also, if the fit test
passed, issue that exact size and model respirator to the test
subject.
If the fit test failed, determine the reason and repeat the test.
Some common reasons for failure are described below.
If you are fit testing with a disposable respirator, discard it
when the fit test is complete. Probed respirators are intended
for fit testing only and are never to be reused. You may be
able to sanitize and reuse other types of respirators. Contact
the respirator manufacturer for specific information.
If the fit test is terminated before the last exercise is completed
(by pressing Stop), the display indicates the test has stopped.
No overall fit factor is displayed.
11. You can now begin to test another person by pressing Next.
Asynchronous Group Fit Testing
See the following application note for Asynchronous Group Fit
Testing: https://www.tsi.com/getmedia/bdc6ac80-88ee-459a-83cb-
1af46b3d9cb0/RFT-026_FPU_ASYNC_Group_Fit_Testing_US-
web?ext=.pdf.
Common Problems Resulting in Low Fit Factors
Some of the most common problems that result in lower than
expected fit factors are described below. Assuming the PortaCount Fit
Tester passes the Daily Checks, explore the following possibilities.
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