【英文标准名称】:StandardTestMethodforResponseofRigidCellularPlasticstoThermalandHumidAging
【原文标准名称】:刚性多孔塑料耐热、耐潮和耐老化性的试验方法
【标准号】:ASTMD2126-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:dimensionalchange;dimensionalstability;humidaging;rigidcellularplastics;thermalaging;Acceleratedaging/testing--plastics;Dimensionalstability;Humidity--plastics;Rigidcellularplastics;Simulatedserviceconditioner;Thermalanalysis(T
【摘要】:Becauseofthewidevarietyofpotentialusesofrigidcellularplastics,artificialexposuretoestimatetheeffectivebehaviorofthesematerialsmustbebased,toagreatextent,ontheintendedapplication.Towardthisend,thistestmethodisintendedtorecommendavarietyofconditionsfromwhichoneormoreofthedesiredexposureconditionscanbeselected.(Note3)Theconditionsrecommendedinthistestmethodhavebeenwidelyusedinartificiallyexposingrigidcellularplasticsandindeterminingtheeffectsofvarioustemperaturesandhumiditiesonthesematerials.Finaltestmeasurementsaredeterminedafterthespecimensreturntoroomtemperature.Wherespecified,thespecimenswillbetestedattheexposurecondition,butmustbereportedassuch.Dimensionalchangesmeasuredbythistestmethodcanbeusedtocomparetheperformanceofmaterialsinaparticularenvironment,toassesstherelativestabilityoftwoormorecellularplastics,ortospecifyanacceptancecriterionforaparticularmaterial.Theresultsofthistestmethodarenotsuitableforpredictingend-useproductperformanceorcharacteristics,noraretheyadequateforengineeringordesigncalculations.Note38212;Wherethermalshockisknownorsuspectedtooccurduetorapidheatingto(orcoolingfrom)aparticulartemperature,guidanceonthepermissibleheatingorcoolingrates,orboth,shallbeobtainedfromthemanufacturerofthematerialconcerned.Note48212;Thedimensionalchangeofaspecimencanvarydependingupontheageofthesampleorthelengthoftimebetweenspecimenpreparationandthebeginningofthetest,orboth.Beforeproceedingwiththistestmethod,referenceshallbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameterscoveredinthematerialsspecification,orcombinationthereof,shalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenospecifications,thenthedefaultconditionsapply.D1.1Thistestmethodcoversproceduresforthethermalandhumidexposureofrigidcellularplastics.Conditionsusedshallbeagreeduponbetweenthepurchaserandthesupplier.Note18212;AlistofcommonlyusedexposureconditionsisfoundinTable1.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note28212;ThistestmethodisequivalenttoISO2796inthesamplingandcalculationsections.ItisnotequivalenttoISO2796intheproceduresection.TABLE1TemperatureandRelativeHumidityConditionsTemperature,x00B0;C(x00B0;F)RelativeHumidity,%x2212;73x00B1;3(x2212;100x00B1;6)
ambient
x2212;40【英文标准名称】:IntegratedServicesDigitalNetwork(ISDN)-CompletionofCallstoBusySubscriber(CCBS)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol-Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecific
【原文标准名称】:综合业务数字网(ISDN).占线用户呼叫完成补充业务(CCBS).数字用户信令系统No.1(DSS1)协议.第2部分:实施协议声明(PICS)格式规范
【标准号】:DINEN300359-2-2002
【标准状态】:现行
【国别】:德国
【发布日期】:2002-03
【实施或试行日期】:
【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】:服务定义;通信网;合格;连接线;电信设备;执行;空白格式;协议;数字信号;远程通信;特性;电信;记录;通信设备;重新呼叫;补充业务;信号传输;终端装置;传输协议;协议实现一致性声明;综合服务数字网络;界面;信号发送系统;综
【英文主题词】:
【摘要】:Thedocumentspecifiesrequirementsinthetelecommunicationssector.
【中国标准分类号】:M11
【国际标准分类号】:33_080
【页数】:1P;A4
【正文语种】:德语