iso翻譯

1、PrProcecedurefinstalledfiltersystemleakagescantestwithaDPCB.6.3用DPC對(duì)安裝好的過濾器系統(tǒng)泄露率進(jìn)行測試的程序B.6.3.1簡介TheintroductionofULPAfilterswithverylowperationswithleakagedefinitionsrelatedtothenmalperationofthefilterrequiresthataninsit

2、uleaktestmanydersofmagnitudemesensitivethantheaerosolphotometertestbeavailabletoprovetheintegrityoffilterstheirmountingsystems.TheDPCmethoddescribedisapplicablefdetectingleaksinfiltersystemsinallcommonlyusedclassesofinst

3、allations.有著非常低的穿過率和泄露率定義的超高效過濾器的引入與濾器的正常泄露率有關(guān)，需要進(jìn)行situ泄露測試，它的靈敏度比一般的氣溶膠光度計(jì)大幾個(gè)數(shù)量級(jí)，可用作提高濾器的完整性和它們的裝備系統(tǒng)。數(shù)據(jù)處理中心方法描述對(duì)一切級(jí)別安裝的濾器的檢漏都是適用的。Themethodprovidesbothaccuracyrapidnessoftheinsitufilterleaktestbyadoptingatwostageapproac

4、h:這種方法為濾器的檢漏測試提供了準(zhǔn)確性和速度，它采用了兩個(gè)階段進(jìn)行：??thefirststageinvolvesscanningthecleansideofthefiltertolookfarelativelysmallincreaseinthenumberofparticlesoverthenmallyexpectedperation.Thisincreaseindicatesthepotentialpresenceofaleak

5、.ThecriteriafmovingprobetodecideonpotentialleaksisdefinedasCa.ThedeterminationofCaisdescribedlater第一階段包括掃描濾器的潔凈區(qū)找到一個(gè)粒子數(shù)量比正常期望的泄露有微弱的相對(duì)增加的地方。這個(gè)增加顯示了潛在的泄露危險(xiǎn)。移動(dòng)中探測器判定是否有潛在泄露危險(xiǎn)的標(biāo)準(zhǔn)根據(jù)Ca定。Ca的決定稍候描述。??thesecondstageinvolvesretur

6、ningtheprobetotheplaceofmaximumparticlecountundereachpotentialleakperfmingastationaryremeasurement.Astatisticallymeaningfulnumberofparticlesshouldnowbecountedtobeabletodecideifaleakispresentnot.Thecriteriafthestationaryp

7、robetodeterminetheleakageisdefinedasNpa.ThedeterminationofNpaisdescribedlater.第二階段包括將探頭移回到每個(gè)潛在泄露的最大粒子數(shù)量處并且固定在那進(jìn)行測量。一個(gè)統(tǒng)計(jì)上地粒子數(shù)量可以判定是否出現(xiàn)泄露。固定探測器決定是否泄露的標(biāo)準(zhǔn)由Npa決定。Npa的決定稍候描述。PreparatystepsarecontainedinB.6.3.2toB.6.3.5thetestp

8、rocedureisspecifiedinB.6.3.6acceptancecriteriarepairactionsaretobefoundinB.6.3.7B.6.6.預(yù)備的步驟包含在B.6.3.2到B.6.3.5中，測試程序在B.6.3.6中詳細(xì)說明，在B.6.3.7和B.6.6中可以找到接受標(biāo)準(zhǔn)和修補(bǔ)方法。B.6.3.2Choiceconditionsfaerosol氣溶膠的選擇和條件氣溶膠的選擇和條件Anartificiall

9、ygeneratedpolydisperseaerosolshouldbeaddedtotheupstreamtoreachthenecessarychallengeconcentration.人工地產(chǎn)生多分散氣溶膠應(yīng)該在上游發(fā)煙以達(dá)到需要的測試濃度。NOTEdioctylphthalate[DOP3)]polyalphaolefin(PAO)di2ethylhexylsebacate(DEHS)liquidsolidmaterialw

10、ithequivalentpropertiessuchaspolystyrenelatex(PSL)shouldbeusedfthetestaerosol.Sometestaerosolscangiverisetooutgassingmoleculardepositionontheproduct.ThesampleprobeinletsizeshouldbecalculatedfromsampleflowrateoftheDPCthef

11、ilterexitairflowvelocity采樣探測器的進(jìn)口尺寸應(yīng)該從DPC的采樣流動(dòng)率和濾器出口的風(fēng)速進(jìn)行計(jì)算。sothattheprobeinletairvelocityispreferablyisokiicwiththefilterexitairflowvelocity.Thesamplingprobeshouldbeofsquarerectangularconfiguration.Inthecaseofarectangula

12、rprobeconfigurationWpDpshouldbebetween61:因此探測器的進(jìn)口風(fēng)速最好和濾器的出口風(fēng)速等動(dòng)力。采樣探測器應(yīng)該是正方形或矩形的形狀。由于采樣頭采用矩形，WpDp在6到1之間：FaVWpDp=[cm]Where這里Dpistheprobedimensionparalleltothescandirection[cm]Dp是平行與掃描方向的探測器的尺寸[cm]。Faistheactualsampleflowr

13、ateofthephotometer[cm3s]Fa是實(shí)際的光度計(jì)的采樣流動(dòng)率[cm3s]Visthefilterexitairflowvelocity[cms]V是濾器的出口空氣流動(dòng)速率[cms]Wpistheprobedimensionperpendiculartothescandirection[cm].Wp是垂直與掃描方向的探測器的尺寸[cm]NOTEInpracticaltermsisokiicsamplingissatisf

14、iedwhenthefollowinglimitsareobserved:(V30%)≥?Vs≥?(V–10%)注意：在實(shí)際條件下，當(dāng)下面的限制可遵守時(shí)等動(dòng)力的采樣是比較好的，whereVisthefilterexitairflowvelocityVsistheprobeinletairvelocity.這里，V是濾器的出口風(fēng)速；Vs是探測器的進(jìn)口風(fēng)速。B.6.3.5Determinationofscanratesampleacquis