AS ISO 16900.2:2015 pdf download.Respiratory protective devices—Methods of test and test equipment Part 2: Determination of breathing resistance.
6 Method 1: Static breathing resistance
6.1 Principle
The device is mounted on a support as described in the performance standard, and air is drawn through the device at a constant flow.
NOTE The convention of reporting breathing resistance is that if, during the inhalation resistance test, the pressure inside the facepiece relative to atmosphere is negative, no sign is used in front of the result,the relative pressure inside the facepece is positive, the result is prefixed with a ‘+‘.
6.2 Equipment
6.2.1 Pressure gauge, calibrated in the appropriate range relevant to the performance standard.
6.2.2 Flowmeter(s), calibrated in the appropriate volumetric flow rate range and corrected for the ambient temperature and ambient atmospher,pressure during use.
6.2.3 Ambient temperature and ambient atmospheric pressure measuring equipment
6.2.4 Regulated blower/compressed air source and/or a variable suction device.
6.2.5 Support for the device, (e.g. filter holder, dummy head or dummy torso) as described in the performance standard.
NOTE It is important that the holder of the filter or face piece does not reduce the effective working area of the filter or facepiece.
6.1 Principle
The device is mounted on a support as described in the performance standard, and air is drawn through the device at a constant flow.
NOTE The convention of reporting breathing resistance is that if, during the inhalation resistance test, the pressure inside the facepiece relative to atmosphere is negative, no sign is used in front of the result,the relative pressure inside the facepece is positive, the result is prefixed with a ‘+‘.
6.2 Equipment
6.2.1 Pressure gauge, calibrated in the appropriate range relevant to the performance standard.
6.2.2 Flowmeter(s), calibrated in the appropriate volumetric flow rate range and corrected for the ambient temperature and ambient atmospher,pressure during use.
6.2.3 Ambient temperature and ambient atmospheric pressure measuring equipment
6.2.4 Regulated blower/compressed air source and/or a variable suction device.
6.2.5 Support for the device, (e.g. filter holder, dummy head or dummy torso) as described in the performance standard.
NOTE It is important that the holder of the filter or face piece does not reduce the effective working area of the filter or facepiece.
