Definition(s)
Fit Testing
The process of evaluating a respirator’s sealing characteristics for a specific user and the respirator’s performance for the user under controlled conditions. For inert entry, fit testing of respiratory protection equipment shall include the specific equipment which will be used for entry as described in 7.2 n).
Source: API Standards 2217A, Guidelines for Safe Work in Inert Confined Spaces in the Petroleum and Petrochemical Industries, Fourth Edition, July 2009. Global Standards