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【英文标准名称】:StandardTestMethodforEvaporationLossofLubricatingOilsbytheNoackMethod
【原文标准名称】:Noack法测定润滑油的蒸发损失的标准试验方法
【标准号】:ASTMD5800-2010
【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】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:evaporationlossoflubricants;Noackvolatility;volatilityoflubricants;Evaporationloss;Lubricatingoils;Noackmethod
【摘要】:Theevaporationlossisofparticularimportanceinenginelubrication.Wherehightemperaturesoccur,portionsofanoilcanevaporate.Evaporationmaycontributetooilconsumptioninanengineandcanleadtoachangeinthepropertiesofanoil.Manyenginemanufacturersspecifyamaximumallowableevaporationloss.Someenginemanufacturers,whenspecifyingamaximumallowableevaporationloss,quotethistestmethodalongwiththespecifications.ProcedureC,usingtheSelby-Noackapparatus,alsopermitscollectionofthevolatileoilvaporsfordeterminationoftheirphysicalandchemicalproperties.Elementalanalysisofthecollectedvolatilesmaybehelpfulinidentifyingcomponentssuchasphosphorous,whichhasbeenlinkedtoprematuredegradationoftheemissionsystemcatalyst.1.1Thistestmethodcoversthreeproceduresfordeterminingtheevaporationlossoflubricatingoils(particularlyengineoils).ProcedureAusestheNoackevaporativetesterequipment;ProcedureBusestheautomatednon-WoodsmetalNoackevaporativeapparatus;andProcedureCusesSelby-Noackvolatilitytestequipment.Thetestmethodrelatestoonesetofoperatingconditionsbutmaybereadilyadaptedtootherconditionswhenrequired.1.2NoackresultsdeterminedusingProceduresAandBshowconsistentdifferences.ProcedureAgivesslightlylowerresultsversusProcedureBonformulatedengineoils,whileProcedureAgiveshigherresultsversusProcedureBonbasestocks.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:18P.;A4
【正文语种】:英语


【英文标准名称】:Cavityresonatormethodtomeasurethecomplexpermittivityoflow-lossdielectricplates
【原文标准名称】:空腔谐振器法测量低损耗介质板的复介电常数
【标准号】:BSEN62562-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-03-31
【实施或试行日期】:2011-03-31
【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】:截止波长;介电常数;介质装置;介电性能;导电体;电气工程;频率范围;材料;数学计算;测量;测量技术;测量方法;微波;电容率;压电器件;特性;质量;质量评定;质量保证;谐振器;温度系数;测试;波导管;波长
【英文主题词】:Cut-offwavelength;Dielectricconstant;Dielectricdevices;Dielectricproperties;Electricconductors;Electricalengineering;Frequencyranges;Materials;Mathematicalcalculations;Measurement;Measuringtechniques;Methodsformeasuring;Microwaves;Permittivity;Piezoelectricdevices;Properties;Quality;Qualityassessment;Qualityassurance;Resonators;Temperaturecoefficients;Testing;Waveguides;Wavelengths
【摘要】:TheobjectofthisInternationalStandardistodescribeameasurementmethodofdielectricpropertiesintheplanardirectionofdielectricplateatmicrowavefrequency.Thismethodiscalledacavityresonatormethod.Ithasbeencreatedinordertodevelopnewmaterialsandtodesignmicrowaveactiveandpassivedevicesforwhichstandardizationofmeasurementmethodsofmaterialpropertiesismoreandmoreimportant.Thismethodhasthefollowingcharacteristics:?therelativepermittivityε'andlosstangenttanδvaluesofadielectricplatesamplecanbemeasuredaccuratelyandnon-destructively;?temperaturedependenceofcomplexpermittivitycanbemeasured;?themeasurementaccuracyiswithin0,3%forε'andwithin5×10fortanδ;?fringingeffectiscorrectedusingcorrectionchartscalculatedonthebasisofrigorousanalysis.Thismethodisapplicableforthemeasurementsonthefollowingcondition:–frequency:2GHz＜f＜40GHz;–relativepermittivity:2＜ε'＜100;–losstangent:10＜tanδ＜10.
【中国标准分类号】:
【国际标准分类号】:17_220_20;33_120_01
【页数】:24P.;A4
【正文语种】:英语