【英文标准名称】:StandardTestMethodforExtrusionRateandApplicationLifeofElastomericSealants
【原文标准名称】:弹性密封料的挤压率和使用寿命的标准试验方法
【标准号】:ASTMC603-1990
【标准状态】:作废
【国别】:美国
【发布日期】:1990
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:弹性体;挤压成型;密封层(剂);使用寿命;建筑材料;挤压率;试验;保存期限
【英文主题词】:applicationlife;extrusionrate;potlife;sealants;elastomers;sealant;buildingmaterials;testing;extrusion
【摘要】:
【中国标准分类号】:Q24
【国际标准分类号】:83_060;91_100_50
【页数】:2P;A4
【正文语种】:英语


【英文标准名称】:Connectorsforelectronicequipment-Testsandmeasurements-Test23c-Shieldingeffectivenessofconnectorsandaccessories
【原文标准名称】:电子设备用电机元件.基本试验程序和测量方法.试验23c.连接件和附件的屏蔽效应
【标准号】:BSEN60512-23-3-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-07-15
【实施或试行日期】:2001-08-15
【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】:高频放大器;试验持续时间;电屏蔽;电气元件;电缆连接件;电连接器;试验条件;机电装置;网络分析仪;高频;射频电缆;插接件连接;电气工程;电插头;频率范围;注入法;防护屏;电缆;材料;屏蔽的;测量;终端外壳;作标记;电子设备及元件;连接器;规范(验收);紧固件;测量技术;试验;电缆;屏蔽效果;电子仪器;数学计算;电子设备;防护屏蔽
【英文主题词】:Cablejunctions;Cables;Connectoredjoints;Connectors;Electriccables;Electricconnectors;Electricplugs;Electricscreens;Electricalcomponents;Electricalengineering;Electromechanicaldevices;Electronicequipment;Electronicequipmentandcomponents;Electronicinstruments;Fasteners;Frequencyranges;Highfrequencies;High-frequencyamplifiers;Injectionmethods;Marking;Materials;Mathematicalcalculations;Measurement;Measuringtechniques;Networkanalysers;Radiofrequencycables;Screeningeffect;Shielded;Shielding;Shields;Specification(approval);Terminalcasings;Testduration;Testing;Testingconditions
【摘要】:ThispartofIEC60512definesastandardtestmethodformeasuringtheshieldingeffec-tivenessofaconnector,oraconnectorfittedwithanaccessoryandterminatedwithacable.Thecompleteassemblyhasacontinuous360°shieldingcapabilitythroughoutitslength.Thistestmethodutilizestheprinciplethattheintrinsicshieldingpropertyoftheconnector/accessory/cableassemblyisitssurfacetransferimpedancewhichcanbeexpressedasthelongitudinalvoltageinsidetheshield,relativetothecurrentflowontheoutsideshell.Thetestmethodisbasedontwoimpedancematchedcircuits.Seefigure1forthemeasurementprinciple.Theconnectorundertestisintegratedintothesecondarycircuit02.Theimpedancematchedinjectionlineoftheprimarycircuit01,whichactivatestheelectromagneticfield,runsparalleltothesurfaceofthetestsampleundertest.Thistestissuitableformeasuringtheshieldingeffectivenessofaconnectorfittedwithtriaxialcontactsterminatedwithshielded,twistedpaircablesasusedindatabussystems.NOTEThisstandardhasbeenadoptedbyAECMAasEN2591-212and,assuch,shouldnotbeamendedwithoutdirectconsultationandliaisonwiththeAECMAorganization.
【中国标准分类号】:L23
【国际标准分类号】:31_220_10
【页数】:16P.;A4
【正文语种】:英语