ISO 6993-2-2006 输送气体燃料用埋设的、高耐冲击的聚氯乙烯(PVC-HI)管道.第2部分:最大操作压力为200mbar(20kPa)的管件
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【英文标准名称】:Buried,high-impactpoly(vinylchloride)(PVC-HI)pipingsystemsforthesupplyofgaseousfuels-Part2:Fittingsforamaximumoperatingpressureof200mbar(20kPa)
【原文标准名称】:输送气体燃料用埋设的、高耐冲击的聚氯乙烯(PVC-HI)管道.第2部分:最大操作压力为200mbar(20kPa)的管件
【标准号】:ISO6993-2-2006
【标准状态】:现行
【国别】:国际
【发布日期】:2006-06-01
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC138
【标准类型】:()
【标准水平】:()
【中文主题词】:分类系统;分类;定义;尺寸;配件;燃气管道;燃气管;燃气供应;气体燃料;塑料管;塑料制品;聚氯乙烯;高耐冲击聚氯乙烯;规范;试验;管;地下
【英文主题词】:
【摘要】:
【中国标准分类号】:E98
【国际标准分类号】:75_200;83_140_30
【页数】:23P.;A4
【正文语种】:英语
【英文标准名称】:StandardGuideforDescribingandSpecifyingtheSpectrometerofanOpticalEmissionDirect-ReadingInstrument
【原文标准名称】:光学辐射直读仪表的分光计的描述与规定用标准指南
【标准号】:ASTME1507-1998(2003)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:E01.20
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:测量仪器;分光计;光学测量;辐射测量仪表
【英文主题词】:astigmatism;detection;diffractiongrating;direct-readingspectrometer;lineinterference;opticalemissionspectrometer(OES);opticalworkingresolution;radiationthroughput;scatteredlight
【摘要】:Direct-readingpolychromatorsareinstrumentscommonlyusedformulti-elementspectrochemicalanalysis.Thisguideseekstodescribethoseaspectsofsuchinstrumentsthatareofsignificanceinachievingusefulspectrochemicalperformance.Awarenessofparametersdescribedinthispracticewillmakemanufacturerscognizantoffactorstheyshouldconsiderindesigninginstruments,assistpurchasersofinstrumentsinmakingintelligentcomparisonsofcompetingdesigns,andmakeusersawareofthecompromisestheymustmakeinperformingparticulardeterminations.Adequatedescriptionofspectrometerspermitsformingqualifiedappraisalsonthreeimportantperformancecharacteristics:accuracyofanalysis,detectionlimits,andfreedomfromlineinterferences.1.1Thisguidecoversfeaturesofaspectrometerorpolychromatorusedforopticalemission,direct-reading,spectrochemicalanalysis.Apolychromatorinthissenseconsistsofaspectrometerwithanextendedandfixedwavelengthrangeandanarrayoffixedexitslitstoisolatethespectrallinesoftheelementstobemeasured.1.1.1Thisguidedoesnotapplytodirect-readingsystemsthatemployechellespectrometersandvidiconorotherdetectorswherethedesignparametersarequitedifferent.1.2Thisguidecoversonlytheopticalportionoftheinstrument,fromexcitationstandtophotomultipliers.1.2.1Onlygeneralstatementsaremadeaboutsourceunits.1.2.2Photomultipliersareincludedtotheextentthattheyaremountedwithinthespectrometertoconvertopticalintensitiestoelectricalsignals,andestablishtheinstrumentalprecisionofeachchannelasalightmeasuringdevice.Readoutsystemsarenotincluded.1.3Itisnotthepurposeofthisguidetoestablishbindingspecificationsortolerances,butrather,tocallattentiontoimportantparametersthatmanufacturersshouldincludeintheirliterature,toprovidemethodsformeasuringthoseparameters,andtoassignvaluesthatareindicativeofacceptablygoodperformance.Becauseofthegreatvarietyofdemandsimposedbyspectrochemicaltechniques,rigidperformancecriteriaarenotfeasible.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N34
【国际标准分类号】:17_180_30
【页数】:17P.;A4
【正文语种】:
【英文标准名称】:Surfacemountingtehcnology-Part1:standardmethodforthespecificationofsurfacemountingcomponents(SMDs).
【原文标准名称】:表面安装技术.第1部分:表面安装部件(SMDs)规范的标准方法
【标准号】:NFC90-710-1999
【标准状态】:现行
【国别】:法国
【发布日期】:1999-12-01
【实施或试行日期】:1999-12-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:表面安装;电子设备及元件;规范;定义;表面安装设备;电气工程
【英文主题词】:
【摘要】:
【中国标准分类号】:M62
【国际标准分类号】:31_020
【页数】:32P;A4
【正文语种】:其他
