Hoʻomaʻemaʻe lumi maʻemaʻe

Ma ʻAmelika Hui Pū ʻIa, a hiki i ka hopena o Nowemapa 2001, ua hoʻohana ʻia ke kūlana federal 209E (FED-STD-209E) e wehewehe i nā koi no nā lumi maʻemaʻe. Ma Nowemapa 29, 2001, ua hoʻololi ʻia kēia mau kūlana e ka paʻi ʻana o ISO Specification 14644-1. ʻO ka maʻamau, ʻo kahi lumi maʻemaʻe i hoʻohana ʻia no ka hana ʻana a i ʻole ka noiʻi ʻepekema he wahi i hoʻomalu ʻia me nā pae haʻahaʻa o nā mea haumia, e like me ka lepo, nā microbes ea, nā ʻāpana aerosol, a me nā mahu kemika. No ka pololei, aia ka lumi hoʻomaʻemaʻe i ka pae pollution i hoʻomalu ʻia, i kuhikuhi ʻia e ka helu o nā ʻāpana i kēlā me kēia mika cubic ma kahi nui o nā mea kikoʻī. Ma ke kaona kaona maʻamau, loaʻa i ka ea o waho he 35 miliona mau ʻāpana i kēlā me kēia mika cubic, 0.5 microns ke anawaena a i ʻole ka nui, e pili ana i kahi lumi maʻemaʻe ISO 9 ma ka pae haʻahaʻa o ka maʻamau maʻemaʻe. Hoʻokaʻawale ʻia nā lumi maʻemaʻe e like me ka maʻemaʻe o ka ea. Ma US Federal Standard 209 (A a hiki i D), ua ana ʻia ka helu o nā ʻāpana like a ʻoi aku paha ma mua o 0.5mm i 1 cubic kapuaʻi o ka ea, a ua hoʻohana ʻia kēia helu no ka hoʻokaʻawale ʻana i nā lumi maʻemaʻe. ʻAe ʻia kēia metric nomenclature e ka mana 209E hou loa o ka maʻamau. Hoʻohana ʻo Kina i ke kūlana federal 209E. ʻO ka maʻamau hou aʻe ʻo ka International Standards Organization's TC 209. Hoʻonohonoho nā kūlana ʻelua i nā lumi maʻemaʻe ma muli o ka helu o nā ʻāpana i loko o ka ea laboratory. Pono nā kūlana hoʻohālikelike lumi maʻemaʻe FS 209E a me ISO 14644-1 i nā ana helu kikoʻī kikoʻī a me nā helu ʻana e hoʻokaʻawale i ka pae maʻemaʻe o kahi lumi maʻemaʻe a i ʻole kahi maʻemaʻe. Ma United Kingdom, hoʻohana ʻia ka British Standard 5295 e hoʻokaʻawale i nā lumi maʻemaʻe. E hoʻololi koke ʻia kēia maʻamau e BS EN ISO 14644-1. Hoʻokaʻawale ʻia nā lumi maʻemaʻe e like me ka helu a me ka nui o nā ʻāpana i ʻae ʻia no ka nui o ka ea. ʻO nā helu nui e like me "Class 100" a i ʻole "Class 1000" e pili ana iā FED_STD209E, e hōʻike ana i ka helu o nā ʻāpana o 0.5 mm a i ʻole ka nui nui i ʻae ʻia i kēlā me kēia kapuaʻi cubic o ka ea.