EN 50289-1-6-2002 通信电缆.试验方法规范.第1-6部分:电气试验方法.电磁性能
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【英文标准名称】:Communicationcables-Specificationsfortestmethods-Part1-6:Electricaltestmethods;Electromagneticperformance;GermanversionEN50289-1-6:2002
【原文标准名称】:通信电缆.试验方法规范.第1-6部分:电气试验方法.电磁性能
【标准号】:EN50289-1-6-2002
【标准状态】:现行
【国别】:
【发布日期】:2002-12
【实施或试行日期】:2002-12-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:传播技术;试验;电气试验;电气工程;通信电缆;规范;模拟;电磁试验;数字的;数字信号;模拟信号;电磁特性
【英文主题词】:Analogue;Analoguesignals;Communicationcables;Communicationtechnology;Digital;Digitalsignals;Electricalengineering;Electricaltesting;Electromagneticproperties;Electromagnetictests;Specification;Testing
【摘要】:
【中国标准分类号】:K13
【国际标准分类号】:33_120_10
【页数】:56P.;A4
【正文语种】:英语
【英文标准名称】:Naturalgas-Calculationofcalorificvalues,density,relativedensityandWobbeindexfromcomposition(ISO6976:1995includingCorrigendum1:1997,Corrigendum2:1997andCorrigendum3:1999);EnglishversionofDINENISO6976
【原文标准名称】:天燃气.热值、密度和相对密度及化合物沃泊指数的计算
【标准号】:DINENISO6976-2005
【标准状态】:现行
【国别】:德国
【发布日期】:2005-09
【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】:计算方法;化学成分;数学计算;定义;密度;热值;沃泊指数;天然气
【英文主题词】:Calorificvalue;Calorificvalues;Chemicalcomposition;Definition;Definitions;Density;Mathematicalcalculations;Methodsofcalculation;Naturalgas;Wobbeindex
【摘要】:ThisInternationalStandardspecifiesmethodsforthecalculationofthesuperiorcalorificvalue,inferiorcalorificvalue,density,relativedensityandWobbeindexofdrynaturalgases,naturalgassubstitutesandothercombustiblegaseousfuels,whenthecompo-sitionofthegasbymolefractionisknown.Themethodsprovideameansofcalculatingtheproper-tiesofthegasmixtureatcommonlyusedmetricref-erenceconditions.Themethodsofcalculationrequirevaluesforvariousphysicalpropertiesofthepurecomponents;thesevaluesareprovidedintablesandtheirsourcesareidentified.Methodsaregivenforestimatingtheprecisionofcalculatedproperties.Themethodsofcalculationofthevaluesofpropertiesoneitheramolarormassbasisareapplicabletoanydrynaturalgas,naturalgassubstituteorothercombustiblefuelwhichisnormallygaseous.Forthecalculationofthevaluesofpropertiesonavolumetricbasis,themethodsarerestrictedtogasesconsistingpreponderantlyofmethane(notlessthan0,5molefraction).ExamplesofcalculationsaregiveninannexDfortherecommendedmethodsofcalculation.NOTES1ThesymbolsusedinthisInternationalStandard.to-getherwiththeirmeanings,aregiveninannexA.2Thequalifiers"higher","upper","total"and"gross"are,forthepurposesofthisInternationalStandard,syn-onymouswith"superior";fikewise,"lower"and"net"aresynonymouswith"inferior".Theterm"heatingvalue"issynonymouswith"calorificvalue";"specificgravity"issynonymouswith"relativedensity";"Wobbenumber"issynonymouswith'Wobbeindex";"compressibilityfactor"issynonymouswith"compressionfactor".3Ifthecompositionofthegasisknownbyvolumefrac-tionsthesemustbeconvertedtomolefractions(seeannexC).Note,however,thatthederivedmolefractionswillhaveuncertaintiesgreaterthanthoseoftheoriginalvolumefractions.4ForthepurposesofthisInternationalStandard,thesumofthemolefractionsusedmustbeumtytothenearest0,0001,andallcomponentswithmolefractionsgreaterthan0,00005mustbeaccountedfor.5Forthecalorificvaluecalculatedonavolumetricbasis,therearelimitationsontheamountsofcomponentsotherthanmethanewhichmaybepresent.Itisimpossibletobedefinitiveonthismatter,butthefollowingguidelinesmaybeuseful:N2shouldnotbepresentinamountsexceeding0,3molefraction;CO2andC2H6shouldeachnotexceed0,15molefrac-tion;noothercomponentshouldexceed0,05molefraction.Giventheselimits,theexpectedtruenessofthecalculationiswithin0,1%.6Theeffectsofwatervapouronthecalortficvalue,e~therdirectlymeasuredorcalculated,arediscussedinannexF7Forthemethodsofcalculationdescribedtobevalid,thegasmustbeaboveitshydrocarbondew-pointatthepre-scribedreferenceconditions.8Thevaluesofbasicphysicalpropertydataaresubjecttorevwsionasmoreaccuratevaluesbecomeava~labiefromauthoritat,vesources.
【中国标准分类号】:E24
【国际标准分类号】:75_060
【页数】:50P.;A4
【正文语种】:英语
基本信息
标准名称: | SDH光发送/光接收模块技术要求-2.488320Gb/S光发送模块 |
英文名称: | Technical Requirements of SHD Optical Transmitter/Optical Receiver Modules——2.488320 Gb/s Optical Transmitter Modules |
中标分类: |
通信、广播 >>
通信设备 >>
光通信设备 |
发布部门: | 中华人民共和国信息产业部 |
发布日期: | 2001-04-24 |
实施日期: | 2001-07-01 |
首发日期: | |
作废日期: | |
提出单位: | 信息产业部电信研究院 |
归口单位: | 信息产业部电信研究院 |
起草单位: | 武汉邮电科学研究院 |
起草人: | 丁国庆、邓柱斌 |
出版社: | 人民邮电出版社 |
出版日期: | 2001-07-01 |
页数: | 14页 |
适用范围
本标准规定了SDH 2.488320 Gb/s光发送模块的技术要求和试验方法。本标准包括SDH 2.488320 Gb/s光发送模块的有关术语、定义、光接口要求、电接口和极限工作条件、可靠性试验和产品检测要求、光模块产品管理方法。本标准适用于SDH 2.488320 Gb/s光发送模块光电参数的测试和检验;相关领域应用也可参照此标准执行。
前言
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所属分类: 通信 广播 通信设备 光通信设备