Quantitative fit test definition
Quantitative fit test or "QNFT" means an assessment of the adequacy of respirator fit by numerically measuring the amount of leakage into the respirator.
Quantitative fit test means the measurement of the effectiveness of a respirator seal in excluding the ambient atmosphere. The test is performed by dividing the measured concentration of challenge agent in a test chamber by the measured concentration of the challenge agent inside the respirator facepiece when the normal air purifying element has been replaced by an essentially perfect purifying element.
Quantitative fit test. (QNFT) means an assess- ment of the adequacy of respirator fit by numerically measur- ing the amount of leakage into the respirator.
More Definitions of Quantitative fit test
Quantitative fit test. (QNFT) means an assessment of the adequacy of respirator fit by numerically
Quantitative fit test. QNFT” means an assessment of the adequacy of
Quantitative fit test means exposing the respirator wearer to a test atmosphere containing an easily detectable, non-toxic aerosol, vapour or gas as the test agent. Instrumentation, which samples the test atmosphere and the air inside the facepiece of the respirator, is used to measure quantitatively the leakage into the respirator.