Zipinda Zoyera

UkhondochipindaIyenera kukwaniritsa miyezo ya International Organisation of Standardization (ISO) kuti igawidwe.ISO idakhazikitsidwa mu 1947 kuti ikhazikitse miyezo yapadziko lonse lapansi pazinthu zovutirapo za kafukufuku wasayansi ndi machitidwe amabizinesi, monga ntchito yamankhwala, zida zosasinthika, ndi zida zovutirapo.Ngakhale kuti bungweli linapangidwa mwaufulu, miyezo yokhazikitsidwa yakhazikitsa mfundo zofunika zomwe zimalemekezedwa ndi mabungwe padziko lonse lapansi.Masiku ano, ISO ili ndi miyezo yopitilira 20,000 yomwe makampani angatchule.

Mu 1960, Willis Whitfield adapanga ndikupanga chipinda choyamba choyera.Zipinda zoyera zidapangidwa kuti ziziteteza zomwe zili mkati mwake kuzinthu zilizonse zakunja.Anthu amene amagwiritsira ntchito chipindacho ndi zinthu zimene zayesedwa kapena kumangidwamo angalepheretse chipinda choyeracho kukwaniritsa miyezo yake yaukhondo.Kuwongolera kwapadera kumafunika kuti athetse mavutowa momwe angathere.

Munthu amene akugwiritsa ntchito chipindacho ndi zinthu zoyesedwa kapena zomangidwa m’chipindacho zingalepheretse chipinda chaukhondocho kukwaniritsa miyezo yake yaukhondo.Kuwongolera kwapadera kumafunika kuti athetse mavutowa momwe angathere.

Mu US Federal Standard 209 (A mpaka D), kuchuluka kwa tinthu ting'onoting'ono tofanana ndi toposa 0.5µm timayezedwa mu kiyubiki mita imodzi ya mpweya, ndipo chiwerengerochi chimagwiritsidwa ntchito kuyika chipinda choyera.Mawu a metric awa amavomerezedwanso mu mtundu waposachedwa kwambiri wa 209E wa Standard.United States imagwiritsa ntchito muyezo wa federal 209E kunyumba.Muyezo waposachedwa kwambiri ndi TC 209 wochokera ku International Standards Organisation.Miyezo yonseyi imayika chipinda choyera potengera kuchuluka kwa tinthu tating'onoting'ono topezeka mumpweya wa labotale.Miyezo yazipinda zoyera FS 209E ndi ISO 14644-1 imafunikira miyeso yeniyeni ya tinthu tating'onoting'ono ndi mawerengedwe a zipinda zoyera kapena ukhondo wamalo.Ku United Kingdom, British Standard 5295 imagwiritsidwa ntchito kuyika zipinda zoyera.Mulingo uwu uyenera kusinthidwa ndi BS EN ISO 14644-1.

chinthu ngati zero particle concentration.Mpweya wamba wamba ndi pafupifupi kalasi 1,000,000 kapena ISO 9.

TS EN ISO 14644-1 Miyezo Yoyera ya Zipinda

BS 5295 Miyezo Yoyera ya Zipinda

Chipinda choyera chimayesa kuchuluka kwa ukhondo powerengera kukula ndi kuchuluka kwa tinthu tating'ono pa cubic voliyumu ya mpweya.Ziwerengero zazikulu ngati "kalasi 100" kapena "kalasi 1000" zimatanthawuza FED_STD-209E, ndikuwonetsa kuchuluka kwa tinthu ting'onoting'ono tomwe timakula 0.5 µm kapena kukulirapo kololedwa pa kiyubiki mita ya mpweya.Muyezowu umalolanso kutanthauzira, kotero ndizotheka kufotokoza mwachitsanzo "kalasi 2000."

Manambala ang'onoang'ono amatchula miyezo ya ISO 14644-1, yomwe imatchula chiwerengero cha chiwerengero cha tinthu ting'onoting'ono ta 0.1 µm kapena zazikulu zololedwa pa kiyubiki mita imodzi ya mpweya.Kotero, mwachitsanzo, chipinda choyera cha ISO kalasi 5 chimakhala ndi 105 =100,000 mlingo(tinthu pa m³).

Onse FS 209E ndi ISO 14644-1 amalingalira maubwenzi a chipika pakati pa kukula kwa tinthu ndi kuchuluka kwa tinthu.Pachifukwa ichi, palibe chinthu monga zero particle concentration.Mpweya wamba wamba ndi pafupifupi kalasi 1,000,000 kapena ISO 9.