UL 924-1995 应急照明和电源设备

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【英文标准名称】:StandardPracticeforContinuousSizingandCountingofAirborneParticlesinDust-ControlledAreasandCleanRoomsUsingInstrumentsCapableofDetectingSingleSub-MicrometreandLargerParticles
【原文标准名称】:用可探测单个亚微米及较大粒子的仪器在灰尘控制区域和无菌室中连续测定空气中粒子的大小及计数用标准实施规程
【标准号】:ASTMF50-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:E21.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:空气质量;分类;计数;灰尘控制;灰尘测量;电子工程;粒状物;工艺;试验设备
【英文主题词】:airsampling;airborneparticles;particlecounting;particlesizedistribution;particles
【摘要】:1.1Thispracticecoversthedeterminationoftheparticleconcentration,bynumber,andthesizedistributionofairborneparticlesindust-controlledareasandcleanrooms,forparticlesinthesizerangeofapproximately0.01to5.0m.Particleconcentrationsnotexceeding3.5106particles/m3(100000/ft3)arecoveredforallparticlesequaltoandlargerthantheminimumsizemeasured.1.2Thispracticeusesanairbornesingleparticlecountingdevice(SPC)whoseoperationisbasedonmeasuringthesignalproducedbyanindividualparticlepassingthroughthesensingzone.Thesignalmustbedirectlyorindirectlyrelatedtoparticlesize.Note1TheSPCtypeisnotspecifiedhere.TheSPCcanbeaconventionalopticalparticlecounter(OPC),anaerodynamicparticlesizer,acondensationnucleuscounter(CNC)operatinginconjunctionwithadiffusionbatteryordifferentialmobilityanalyzer,oranyotherdevicecapableofcountingandsizingsingleparticlesinthesizerangeofconcernandofsamplinginacleanroomenvironment.1.3IndividualsperformingtestsinaccordancewiththispracticeshallbetrainedinuseoftheSPCandshallunderstanditsoperation.1.4Sincetheconcentrationandtheparticlesizedistributionofairborneparticlesaresubjecttocontinuousvariations,thechoiceofsamplingprobeconfiguration,locationsandsamplingtimeswillaffectsamplingresults.Further,thedifferencesinthephysicalmeasurement,electronicandsamplehandlingsystemsbetweenthevariousSPCsandthedifferencesinphysicalpropertiesofthevariousparticlesbeingmeasuredcancontributetovariationsinthetestresults.Thesedifferencesshouldberecognizedandminimizedbyusingastandardmethodofprimarycalibrationandbyminimizingvariabilityofsampleacquisitionprocedures.1.5Sampleacquisitionproceduresandequipmentmaybeselectedforspecificapplicationsbasedonvaryingcleanroomclasslevels.Firmrequirementsfortheseselectionsarebeyondthescopeofthispractice;however,samplingpracticesshallbestatedthattakeintoaccountpotentialspatialandstatisticalvariationsofsuspendedparticlesincleanrooms.GeneralreferencestocleanroomclassificationsfollowFederalStandard209E,latestrevision.Whereairborneparticlesaretobecharacterizedindust-controlledareasthatdonotmeettheseclassifications,thelatestrevisionofthepertinentspecificationfortheseareasshallbeused.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardsstatements,seeSection8.
【中国标准分类号】:C72
【国际标准分类号】:13_040_30
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:Bondedabrasiveproducts-Dimensions-Part12:Grindingwheelsfordeburringandfettlingonastraightgrinder
【原文标准名称】:粘合磨料产品尺寸第12部分:在卧式砂轮机上清理和去毛刺用砂轮
【标准号】:ISO603-12-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-07
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC29
【标准类型】:()
【标准水平】:()
【中文主题词】:去毛刺;直的磨料;名称与符号;尺寸;粘合;工具;磨料制品;夹具;砂轮;规范(验收);粗磨;试验;磨料
【英文主题词】:Abrasiveproducts;Abrasives;Bound;Deburring;Designations;Dimensions;Fixtures;Grindingwheels;Rough-grinding;Specification(approval);Straightgrinders;Testing;Tools
【摘要】:ThispartofISO603specifiesthenominaldimensions,inmillimeters,of:—Type1:Straightgrindingwheel—Type4:Wheeltaperedonbothsides—Type16:Cylindricalplug,taperedcone—Type18:Cylindricalplug,flatend—Type18R:Cylindricalplug,roundend—Type19:Cylindricalplug,taper-rollshapedThesebondedabrasiveproductsareintendedtobeusedfordeburringandfettlingofanysurfacesofaworkpieceusinghand-heldgrindingmachines(straightgrinder).Theworkpieceisfixed,thegrindingmachineisguidedbyhand.
【中国标准分类号】:J43
【国际标准分类号】:25_100_70
【页数】:6P;A4
【正文语种】:英语