NF P39-401-1998 带瓦楞的沥青层(欧洲标准EN534)

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【英文标准名称】:Gasanalysis-Preparationofcalibrationgasmixturesusingdynamicvolumetricmethods-Criticalorifices
【原文标准名称】:气体分析.用动态容量法制备标定用混合气体.临界孔
【标准号】:BSISO6145-6-2003
【标准状态】:作废
【国别】:英国
【发布日期】:2003-05-16
【实施或试行日期】:2003-05-16
【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】:
【英文主题词】:Calibration;Calibrationgases;Controlsamples;Critical;Gasanalysis;Gasmixtures;Gas-volumetricanalysis;Methods;Nozzles;Orifices;Preparation;Production;Testgases
【摘要】:ThispartofISO6145specifiesamethodforthecontinuousproductionofcalibrationgasmixtures,containingtwoormorecomponents,frompuregasesorothergasmixturesbyuseofcriticalorificesystems.Byselectionofappropriatecombinationsoforificesandwiththeuseofpuregases,thevolumefractionofthecalibrationcomponentinthecalibrationgasmixturecanbevariedbyafactorof10.Additionally,itcanbechangedbyafactorof10bychangingtheinitialpressuresintheorificesystems.Theuncertaintyofthemethoddependsmainlyupontheflowcalibrationmethodandthevariationsintemperatureandoutletpressure.Therelativeexpandeduncertaintyinthevolumefractionobtainableforabinarymixture(atacoveragefactorof2)is3%.Ifpre-mixedgasesareusedinsteadofpuregases,muchlowervolumefractionscanbeobtained(seeAnnexA).Themassflowratesorvolumeflowrates,fromwhichthemassorvolumefractionsaredetermined,canbecalculatedandcanbeindependentlymeasuredbyasuitablemethodgiveninISO6145-1.Themeritsofthemethodarethatmulti-componentmixturescanbepreparedasreadilyasbinarymixturesiftheappropriatenumberoforificesisutilized,andthatalargequantityofcalibrationgasmixturecanbepreparedonacontinuousbasis.Therangeofflowratescanbefromseveralmillilitresperminutetoapproximately10l/min.Althoughparticularlyapplicabletopreparationofgasmixturesatbarometricpressure,themethodalsoprovidesameansofpreparationofcalibrationgasmixturesatpressuresabovebarometricpressure.AnnexBgivespracticalhintsontheuseofthemethod.
【中国标准分类号】:Z15
【国际标准分类号】:71_040_40
【页数】:20P.;A4
【正文语种】:英语


【英文标准名称】:STATIONARYSTORAGEBATTERIES,"PLANTE"TYPE.PERMISSIBLEIMPURITIESINSOFTLEAD.
【原文标准名称】:“极板型”固定式铅蓄电池组.软铅中杂质的容许范围
【标准号】:NFC58-406-1968
【标准状态】:作废
【国别】:法国
【发布日期】:1966-07-12
【实施或试行日期】:1968-02-22
【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】:铅;规范;蓄电池;铅酸蓄电池;酸性铅蓄电池;杂质;含量测定;电池组;电池
【英文主题词】:specifications;determinationofcontent;lead;storagebatteries;leadacidbatteries;lead-acidbatteries;electricbatteries;electriccells;impurities
【摘要】:
【中国标准分类号】:K84
【国际标准分类号】:
【页数】:1P;A4
【正文语种】:其他