NF C97-010-1974 电声.噪音和振动分析用倍频程、1／2倍频程和1／3倍频程频带滤波器
时间:2024-05-06 04:05:28 来源: 标准资料网 作者：标准资料网 阅读：8344
【英文标准名称】:OCTAVE,HALF-OCTAVEANDTHIRD-OCTAVEBANDFILTERSINTENDEDFORTHEANALYSISOFSOUNDSANDVIBRATIONS.
【原文标准名称】:电声.噪音和振动分析用倍频程、1／2倍频程和1／3倍频程频带滤波器
【标准号】:NFC97-010-1974
【标准状态】:作废
【国别】:法国
【发布日期】:1974-11
【实施或试行日期】:1974-11-14
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:滤波器;声学性能;声学性质和声学现象;电声学;电声效应;电声器件;频率;规范;电性能;电性质和电现象;带通滤波器
【英文主题词】:
【摘要】:
【中国标准分类号】:M04
【国际标准分类号】:
【页数】:10P;A4
【正文语种】:其他
【英文标准名称】:SpecificationforHelmetsUsedforDownhillMountainBicycleRacing
【原文标准名称】:下山自行车比赛用头盔规范
【标准号】:ANSI/ASTMF1952-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:脚踏车;自行车;保健;防护帽;体育与娱乐设备;山;防护服装;头皮防护器
【英文主题词】:Bicycles;Cycles;Healthprotection;Helmets;Leisureequipment;Mountains;Protectiveclothing;Scalpprotectors
【摘要】:
【中国标准分类号】:Y56
【国际标准分类号】:13_340_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDetectingSealLeaksinPorousMedicalPackagingbyDyePenetration
【原文标准名称】:用染色渗透液检测多孔医疗包装汽封泄漏的标准试验方法
【标准号】:ASTMF1929-1998(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:F02.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:染色渗透液;多孔包装;汽封泄漏;软包装
【英文主题词】:Dyepenetrant;flexiblepackaging;porouspackaging;sealleaks
【摘要】:Harmfulbiologicalorparticulatecontaminantsmayenterthedevicethroughleaks.Theseleaksarefrequentlyfoundatsealsbetweenpackagecomponentsofthesameordissimilarmaterials.Leaksmayalsoresultfromapinholeinthepackagingmaterial.Thisdyepenetrantprocedureisapplicableonlytoindividualleaksinapackageseal.Thepresenceofanumberofsmallleaks,asfoundinporouspackagingmaterial,whichcouldbedetectedbyothertechniques,willnotbeindicated.Thereisnogeneralagreementconcerningthelevelofleakagethatislikelytobedeleterioustoaparticularpackage.However,sincethesetestsaredesignedtodetectleakage,componentsthatexhibitanyindicationofleakagearenormallyrejected.Sinceleaksmaychangeinsizewithdifferentambientconditions,comparisonsbetweenteststationsarenotconclusive.Thereforethismethodisusuallyemployedasago,no-gotest.Thedyesolutionwillwickthroughanyporousmaterialovertime,butusuallynotwithinthemaximumtimesuggested.Ifwickingdoesoccur,itmaybeverifiedbyobservingtheporoussideofthesubjectsealarea.Thedyewillhavediscoloredthesurfaceofthematerial.Whenpuncturingthepackagingtoallowinjectionofthedyepenetrantsolution,careshouldbetakennottopunctureotherpackagesurfaces.Puncturingofthepackageisfacilitatedifitisdoneadjacenttoadummydeviceinsidethepackage.Thedevicewillprovideatentingeffectthatwillseparatethetwosidesofthepackage,reducingthechanceofaccidentalpunctureofbothsides.1.1Thistestmethoddefinesmaterialsandaprocedurethatwilldetectandlocatealeakequalorgreaterthanachannelformedbya50956;m(0.002in.)wireinpackageedgesealsformedbetweenatransparentfilmandaporoussheetmaterial.Adyepenetrantsolutionisappliedlocallytothesealedgetobetestedforleaks.Aftercontactwiththedyepenetrantforaspecifiedtime,thepackageisvisuallyinspectedfordyepenetration.1.2Thistestmethodisintendedforuseonpackageswithedgesealsformedbetweenatransparentfilmandaporoussheetmaterial.Thistestmethodislimitedtoporousmaterialswhichcanretainthedyepenetrantsolutionandpreventitfromdiscoloringtheentiresealareaforaminimumof20s.Uncoatedpapersareespeciallysusceptibletoleakageandmustbeevaluatedcarefullyfrousewiththistestmethod.1.3Thistestmethodrequiresthatthedyepenetranthavegoodcontrasttotheopaquepackagingmaterial.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C30
【国际标准分类号】:55_040
【页数】:3P.;A4
【正文语种】: