YY/T 0866-2011: Translated English of Chinese Standard. (YYT 0866-2011, YY/T0866-2011, YYT0866-2011): Total Inward Leakage Determination Method of Protective Face Mask for Medical Use
https://www.chinesestandard.net, 31 mar 2020 - 12 pagine
This Standard stipulates the determination method for total inward leakage of protective face mask for medical use. This Standard is applicable to the evaluation of total inward leakage of half-facepiece protective face mask for medical use (hereinafter referred to as face mask). The evaluation of the leakage performance of other protective face masks may take this Standard as a reference.
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able accordance actions addition adjusted aerosol concentration allows applicable Ask the subjects average mass concentration background Beijing calculation chin point closed chamber closed test chamber collect sample comply components concentration of aerosol concentration of NaCl conduct the test connected cover determination Device diameter Dimensions direct document ensure enters equipped evaluation exceed Figure Flame photometer GB/T Half Facepiece inhaled air Insert Keep your head L/min least leave Look manufacturer’s instructions mask for medical measurement Medical Device Morphological Length mouth NaCl aerosol NaCl concentration necessary obtain organizer particle performance Personnel place for 24 possible Preparation pressure sensor Process protective face mask pump received pre-treatment record references requirements response result sampling probe Select signal specified date speed Standard subject wears subject’s head suitable switch talk test airflow threshold total inward leakage treadmill tube Turn typical valve walk wear the mask wearing