Ukuhlelwa kweGumbi eliCocileyo

Cocaigumbikufuneka ihlangabezane nemigangatho ye-International Organisation of Standardization (ISO) ukuze ihlelwe.I-ISO yasekwa ngo-1947 ukuphumeza imigangatho yamazwe ngamazwe kwimiba ebuthathaka yophando lwezenzululwazi kunye nezenzo zoshishino, ezinjengomsebenzi weekhemikhali, izinto eziguquguqukayo, kunye nezixhobo ezibuthathaka.Nangona umbutho wadalwa ngokuzithandela, imigangatho esekiweyo iye yamisela imigaqo esisiseko ehlonitshwa yimibutho yehlabathi.Namhlanje, i-ISO inemigangatho engaphezulu kwe-20,000 iinkampani ezinokubhekisa kuyo.

Ngowe-1960, uWillis Whitfield wavelisa kwaye wayila igumbi lokuqala elicocekileyo.Amagumbi acocekileyo ayilwe kwaye ayilelwe ukukhusela iinkqubo zawo kunye neziqulatho kuzo naziphi na izinto ezingaphandle kokusingqongileyo.Abantu abasebenzisa igumbi nezinto ezivavanyiweyo okanye ezakhiwe kulo basenokulithintela elo gumbi licocekileyo ukuba lifikelele imilinganiselo yalo yokucoceka.Ulawulo olukhethekileyo luyafuneka ukuze kupheliswe ezi zinto ziyingxaki kangangoko kunokwenzeka.

Umntu osebenzisa igumbi kunye nezinto ezivavanyiweyo okanye ezakhiwe kwelo gumbi zinokulithintela igumbi elicocekileyo ekufikeleleni imilinganiselo yalo yokucoceka.Ulawulo olukhethekileyo luyafuneka ukuze kupheliswe ezi zinto ziyingxaki kangangoko kunokwenzeka.

Kwi-US Federal Standard 209 (A ukuya ku-D), ubungakanani bamasuntswana alingana nangaphezulu kwe-0.5µm alinganiswa kwi-cubic foot ye-moya enye, kwaye olu balo lusetyenziselwa ukwahlula igumbi elicocekileyo.Eli gama lokulinganisa lamkelwe kolona guqulelo lwamva nje lwama-209E loMgangatho.IUnited States isebenzisa umgangatho womanyano 209E ngaphakathi.Umgangatho wakutsha nje yi-TC 209 evela kuMbutho weMigangatho yeHlabathi.Yomibini imigangatho ihlela igumbi elicocekileyo ngokusekelwe kwinani lamasuntswana afunyenwe emoyeni welabhoratri.Imigangatho yokuhlelwa kwegumbi elicocekileyo i-FS 209E kunye ne-ISO 14644-1 ifuna imilinganiselo ethile yokubalwa kwamasuntswana kunye nokubalwa kwegumbi elicocekileyo okanye amanqanaba okucoceka kwendawo.EUnited Kingdom, iBritish Standard 5295 isetyenziselwa ukwahlula igumbi elicocekileyo.Lo mgangatho uza kutshintshwa yi-BS EN ISO 14644-1.

into njenge-zero particle concentration.Umoya wegumbi eliqhelekileyo umalunga neklasi ye-1,000,000 okanye i-ISO 9.

I-ISO 14644-1 Imigangatho yegumbi ecocekileyo

I-BS 5295 Imigangatho yegumbi elicocekileyo

Ukuhlelwa kwegumbi elicocekileyo lilinganisa inqanaba lokucoceka ngokubala ubungakanani kunye nobungakanani bamaqhekeza ngecubic umthamo womoya.Amanani amakhulu afana “nodidi 100” okanye “udidi 1000” abhekisa kwi-FED_STD-209E, kwaye abonise inani lamasuntswana obungakanani obungu-0.5 µm okanye ngaphezulu avumelekileyo kwi-cubic foot nganye yomoya.Umgangatho ukwavumela ukutolikwa, ngoko ke kuyenzeka ukuchaza umzekelo "iklasi 2000."

Amanani amancinane abhekisa kwimigangatho ye-ISO 14644-1, echaza idesimali yelogarithm yenani lamasuntswana angama-0.1 µm okanye amakhulu avumelekileyo kwi-cubic meter nganye yomoya.Ngoko, umzekelo, i-ISO yeklasi ye-5 yokucoceka ine-105 =Inqanaba le-100,000(amasuntswana ngokwe m³).

Zombini i-FS 209E kunye ne-ISO 14644-1 zithatha ubudlelwane belog-log phakathi kobungakanani besuntswana kunye nokuxinana kwamasuntswana.Ngenxa yeso sizathu, akukho nto injenge-zero particle concentration.Umoya wegumbi eliqhelekileyo umalunga neklasi ye-1,000,000 okanye i-ISO 9.