DIN EN 60512-25-2-2002 电子设备连接器.试验和测量.第25-2部分:试验25b.衰减(插入损耗)(IEC60512-25-2:2002);德文版本EN60512-25-2:2002

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【英文标准名称】:Connectorsforelectronicequipment-Testsandmeasurements-Part25-2:Test25b:Attenuation(insertionloss)(IEC60512-25-2:2002);GermanversionEN60512-25-2:2002
【原文标准名称】:电子设备连接器.试验和测量.第25-2部分:试验25b.衰减(插入损耗)(IEC60512-25-2:2002);德文版本EN60512-25-2:2002
【标准号】:DINEN60512-25-2-2002
【标准状态】:现行
【国别】:德国
【发布日期】:2002-12
【实施或试行日期】:2002-12-01
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:机电学;电气工程;电子仪器;阻尼(波);机电装置;性能试验;开关;试验;电子工程;元部件;电气元件;衰减因素;测量技术;电缆连接;介入损耗;机电的;电子设备;定义;衰减;衰减
【英文主题词】:
【摘要】:ThispartofIEC60512isapplicabletoelectricalconnectors,sockets,cableassembliesorinterconnectionsystems.Thisstandarddescribesafrequencyandatimedomainmethodtomeasureattenuation/insertionlossasafunctionoffrequency.
【中国标准分类号】:L23
【国际标准分类号】:31_220_10
【页数】:15P;A4
【正文语种】:德语


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【英文标准名称】:TestMethodforDensityofPolyethylenebytheUltrasoundTechnique(08.03)
【原文标准名称】:超声技术测定聚乙烯密度的方法(08.03)
【标准号】:ANSI/ASTMD4883-1999
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【实施或试行日期】:1999-08-03
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:高聚物;超声波学;试验;塑料;密度
【英文主题词】:testing;polymers;ultrasonics;density;plastics
【摘要】:Thistestmethodcoversthedeterminationofthedensityofpolyethylenethroughtheutilizationofultrasoundequipment.Thistestmethodisbasedonthedistinctbehaviorsoftheamorphousandcrystallinephasesofpolyethyleneinresponsetoultrasound.Polyethylenecanbeviewedasacompositestructurewherehigh-densitycrystallineregionsareconnectedbylower-densityamorphousmaterial.Theratioofcrystallinetoamorphousmaterialdeterminesthefinaldensityofthematerial.Theamorphousandcrystallinephasesexhibitverydistinctbehaviorswithregardtothepropagationofsoundwaves.Thepropagationcharacteristicsinthecompositewilldependontherelativeamountofthetwophases(thedegreeofcrystallinity).InorganicmaterialsincreasedensityasmeasuredbyTestMethodsD792andD1505,buttheyhavelittleornoeffectonultrasonicdensity.Theultrasonicmeasurementisbasicallyabaseresindensity.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1-ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:
【正文语种】:英语


【英文标准名称】:Textiles-Determinationoftwistinyarns-Directcountingmethod
【原文标准名称】:纺织品.纱线捻度的测定.直接计数法
【标准号】:BSENISO2061-1996
【标准状态】:作废
【国别】:英国
【发布日期】:1996-03-15
【实施或试行日期】:1996-03-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:纺织试验;取样方法;缆线;计数;捻度测定;试验条件;单纱;合股纱线;试样;数学计算;试验设备;纱;纺织产品;试样制备;纱线试验
【英文主题词】:Amount;Changeoflength;Counting;Definition;Definitions;Determination;Dimensions;Directionoftwist;Double;Doubling(textiles);Filamentyarns;Length;Mathematicalcalculations;Measurement;Measuringsamples;Multiple;Multistage;Orientation;Rotation;Samplingmethods;Spunyarns;Staplefibre;Testing;Tests;Textileproducts;Textiletesting;Textiles;Twine;Twistdetermination(textiles);Twistfactor;Twisting;Untwistmethods;Yarn;Yarntesting;Yarns
【摘要】:1ThisInternationalStandardspecifiesamethodforthedeterminationofthedirectionoftwistinyarns,theamountoftwist,intermsofturnsperunitlength,andthechangeinlengthonuntwisting,bythedirectcountingmethod.2ThisInternationalStandardisapplicableto:a)singleyarns(spunormultifilament);b)folded(plied)yarns;c)cabledyarns.Separateproceduresaregivenforeachtypeofyarn.Themethodisdesignedprimarilyforyamsinpack-ages,butwithspecialprecautionstheprocedurescanbeusedforyamstakenfromfabrics.Itisnotsuitableforthedeterminationoftwistinamonofilament.NOTE1SeealsoISO1890:—(up1)>,Reinforcementyarns—Determinationoftwist,whichwaspreparedespeciallyfortheneedsofglasstextiletechnology,andISO7211-4:1984,Textiles—Wovenfabrics—Construction—Methodsofanalysis—Part4:Determinationoftwistinyarnremovedfromfabric.3ThisInternationalStandardcoversthedetermi-nationoftwistinpliedandcabledyarnsasfollows.—Inpliedyarns:thefinaltwistofthepliedyarnsandtheoriginaltwistofthesingleyarnbeforeplying.—Incabledyarns:a)thefinalcablingtwistoftheyarn;b)theoriginaltwistofthepliedyarnafterplying,butpriortothelaststageofprocessing;c)thetwistofthesingleyarnbeforeplying.4Ifdesired,thetwistofsingleandpliedyarncomponentsastheylieinthefinalstructuremaybedeterminedbythespecialproceduregivenin10.5.7.5ThisInternationalStandardisnotapplicable,ex-ceptbyagreement,toyarnswhichstretchmorethan0,5%whenthetensionincreasesfrom0,5to1,0cNperunitlineardensityoftheyarnexpressedintex.Suchyarnsmaybetestedunderspecialconditionsoftensionwhichareacceptedbyallpartiesinterestedinthetestresults.6ThisInternationalStandardisnotsuitableforproductsofopen-endspinningandintermingled(interlaced)multifilamentyarns.7ThisInternationalStandardisnotapplicabletoyarnswhicharetoolargetopermittheirbeingplacedintheclampsofthetestingapparatuswithoutcrush-ingordistortionsevereenoughtoaffectthetestre-sults.note:1)Tobepublished.(RevisionofISO1890:1986)
【中国标准分类号】:W04
【国际标准分类号】:59_080_20
【页数】:18P.;A4
【正文语种】:英语