作者:标准资料网 时间:2024-05-06 19:43:46   浏览:9365   来源:标准资料网

【英文标准名称】:StandardTestMethodforDeterminingInitial,Fractional,FiltrationEfficiencyofaVacuumCleanerSystem
【原文标准名称】:测定真空吸尘器系统初始部分过滤效率的标准试验方法
【标准号】:ASTMF1977-2004(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F11.23
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:efficiency;filtration;vacuumcleaner;Particlecounters/counting;Vacuumcleaners/systems;Efficiency;Filtration;Fractionalfiltrationeffeciency(FFE)
【摘要】:Itiswellknownthatmodernelectricalappliances,incorporatingelectricmotorsthatusecarbonbrushesforcommutation,mayemitaerosolized,particlesintothesurroundingenvironment.Thistestmethoddeterminestheinitial,fractional,filtrationefficiencyofavacuumcleanersystem,takingthoseemissionsintoconsideration.Forallvacuumcleanersystemstested,thetotalemissionsoftheunit,whateverthesource(s),willbecountedateachofthesixparticlesizelevelsidentifiedinthetestprocedure.Thistestmethoddeterminestheinitial,fractionalfiltrationefficiencyofavacuumcleanersystem,withorwithoutthemotoremissionsmathematicallyremovedinthecalculationofefficiency.1.1Thistestmethodmaybeusedtodeterminetheinitial,fractional,filtrationefficiencyofhouseholdandcommercialcanister(tank-type),stick,hand-held,upright,andutilityvacuumcleanersystems.1.1.1Water-filtrationvacuumcleanerswhichdonotutilizeareplaceabledrymediafilterlocatedbetweenthewater-basedfilterandcleaningairexhaustarenotincludedinthistestmethod.Ithasbeendeterminedthattheexhaustofthesevacuumcleanersisnotcompatiblewiththespecifieddiscreteparticlecounter(DPC)procedure.1.2Theinitial,fractional,filtrationefficienciesoftheentirevacuumcleanersystem,atsixdiscreteparticlesizes(0.3,0.5,0.7,1.0,2.0,and>3x03BC;m),isderivedbycountingupstreamchallengeparticlesandtheconstituentofdownstreamparticleswhilethevacuumcleanersystemisbeingoperatedinastationarytestcondition.1.3Thevacuumcleanersystemistestedatthenozzlewiththenormalairflowrateproducedbyrestrictingtheinlettothenozzleadapterwiththe1x00BC;-in.orifice.1.4Thevacuumcleanersystemistestedwithanewfilter(s)installed,andwithnopreliminarydustloading.Thefractionalefficienciesdeterminedbythistestmethodshallbeconsideredinitialsystemfiltrationefficiencies.Thefiltersarenotchangedbetweentestrunsonthesamecleaner.1.5Neutralizedpotassiumchloride(KCl)isusedasthechallengemediainthistestmethod.1.6Oneortwoparticlecountersmaybeusedtosatisfytherequirementsofthistestmethod.Ifusingonecounter,flowcontrolisrequiredtoswitchbetweensamplingtheupstreamanddownstreamairsamplingprobes.1.7Toefficientlyutilizethistestmethod,automatedtestequipmentandcomputerautomationisrecommended.1.8Differentsamplingparameters,flowrates,andsoforth,forthespecificapplicationsoftheequipmentandtestproceduremayprovideequivalentresults.Itisbeyondthescopeofthistestmethodtodefinethosevariouspossibilities.1.9Thistestmethodislimitedtothetestapparatus,oritsequivalent,asdescribedinthisdocument.1.10Thistestmethodisnotintendedordesignedtoprovideanymeasureofthehealtheffectsormedicalaspectsofvacuumcleaning.1.11ThistestmethodisnotintendedordesignedtodeterminetheintegrityofHEPAfiltrationassembliesusedinvacuumcleanersystemsemployedinnuclearanddefensefacilities.1.12Theinch-poundsystemofunitsisusedinthistestmethod,exceptforthecommonusageofthemicrometer,x03BC;m,forthedescriptionofparticlesizewhichisaSIunit.1.13Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatory......
【中国标准分类号】:Y62
【国际标准分类号】:97_080
【页数】:17P.;A4
【正文语种】:英语