1.1This practice covers the calculations of all the permeation parameters related to Test Method F739, ISO 6529, and Practice D6978 standards by use of a computer program, referred to as “Permeation Calculator” (DHHS (NIOSH) Publication No. 2007 - 143c).²^,³

1.2The practice is applicable to both open loop and closed loop permeation tests. The closed loop test includes continuous sampling and discrete sampling. The discrete sampling includes tests when sample volume is replaced and also when sample volume is not replaced. For an open loop permeation test, the computer program also allows permeation data files with variable sampling flow rate. Refer to Test Method F739 for more details about the different types of the permeation testing systems.

1.3This practice is applicable to the most typical permeation behavior, that is, Type A, where the permeation rate stabilizes at a “steady-state” value. It does not apply to the other types of permeation behaviors. Refer to Test Method F739 for more details about the various permeation behaviors.

1.4This practice is not applicable to Test Method F1383 because the permeation behavior is different under conditions of intermittent contact than under conditions of continuous contact.

1.5This practice does not address the procedure of permeation testing. Refer to Test Method F739, ISO 6529, or Practice D6978 for the procedures in detail if needed.