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【英文标准名称】:Petroleumproducts-Determinationoflowleadcontentsingasolines-Wavelength-dispersiveX-rayfluorescencespectrometry(XRF).
【原文标准名称】:石油产品.汽油中低铅含量的测定.波长色散X射线荧光光谱法(XRF)
【标准号】:NFM07-082-2003
【标准状态】:现行
【国别】:法国
【发布日期】:2003-08-01
【实施或试行日期】:2003-08-20
【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】:测定;铅;液体;化学分析和试验;含量;试验;含量测定;石油产品;X射线荧光光谱法;煤油产品;铅含量
【英文主题词】:Chemicalanalysisandtesting;Content;Determination;Determinationofcontent;Kerosineproduct;Lead;Leadcontent;Liquid;Petroleumproducts;Testing;X-rayfluorescencespectrometry
【摘要】:
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:10P;A4
【正文语种】:其他


【英文标准名称】:Electroacoustics-Soundlevelmeters-Specifications
【原文标准名称】:电声学.声级计.规范
【标准号】:BSEN61672-1-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-03-25
【实施或试行日期】:2003-03-25
【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】:定义;电声学;噪声控制;声级;规范(验收);电气工程;规范;测量;职业安全;污染控制;作标记;特性;声级计;声学;测量仪器;声学测量;频率;声学性质和声学现象;误差极限;噪声测量;特点;频率测量;试验;噪声(环境的);声学试验;电气试验;精密度;电性质和电现象;声压级
【英文主题词】:Acousticmeasurement;Acousticpropertiesandphenomena;Acoustictesting;Acoustics;Definition;Definitions;Electricalengineering;Electricalproperties;Electricalpropertiesandphenomena;Electricaltesting;Electroacoustics;Errorlimits;Features;Frequencies;Frequencymeasurement;Marking;Measurement;Measuringinstruments;Noisecontrol(acoustic);Noise(environmental);Noisemeasurements;Occupationalsafety;Pollutioncontrol;Precision;Properties;Soundexposure;Soundlevels;Soundpressurelevel;Sound-levelmeters;Specification;Specification(approval);Testing
【摘要】:1Thisstandardgiveselectroacousticalperformancespecificationsforthreekindsofsoundmeasuringinstruments:-aconventionalsoundlevelmeterthatmeasuresexponentialtime-weightedsoundlevel;-anintegrating-averagingsoundlevelmeterthatmeasurestime-averagesoundlevel;and-anintegratingsoundlevelmeterthatmeasuressoundexposurelevel.Asingleinstrumentmaymakeany,orall,ofthethreekindsofmeasurements.Additionalperformancespecificationsaregivenforthemeasurementofmaximumtime-weightedsoundlevelandpeakCsoundlevel.Frequency-weightingAismandatoryforallsoundlevelmetersspecifiedinthisstandard.2Soundlevelmetersconformingtotherequirementsofthisstandardhaveaspecifiedfrequencyresponseforsoundincidentonthemicrophonefromoneprincipaldirectioninanacousticfreefieldorfromrandomdirections.3Soundlevelmetersspecifiedinthisstandardareintendedtomeasuresoundsgenerallyintherangeofhumanhearing.NOTEFormeasurementofaudiblesoundinthepresenceofultrasound,theAUweighting,specifiedinIEC61012[1],maybeapplied.4Twoperformancecategories,class1andclass2,arespecifiedinthisstandard.Ingeneral,specificationsforclass1andclass2soundlevelmetershavethesamedesigngoalsanddiffermainlyinthetolerancelimitsandtherangeofoperationaltemperatures.Tolerancelimitsforclass2specificationsaregreaterthan,orequalto,thoseforclass1specifications.5Thisstandardisapplicabletoarangeofdesignsforsoundlevelmeters.Asoundlevelmetermaybeaself-containedhand-heldinstrumentwithanattachedmicrophoneandabuilt-indisplaydevice.Asoundlevelmetermaybecomprisedofseparatecomponentsinoneormoreenclosuresandmaybecapableofdisplayingavarietyofacousticalsignallevels.Soundlevelmetersmayincludeextensiveanalogueordigitalsignalprocessing,separatelyorincombination,withmultipleanalogueanddigitaloutputs.Soundlevelmetersmayincludegeneral-purposecomputers,recorders,printers,andotherdevicesthatformanecessarypartofthecompleteinstrument.note:1Numbersinsquarebracketsrefertothebibliography.6Soundlevelmetersmaybedesignedforusewithanoperatorpresentorforautomaticandcontinuousmeasurementsofsoundlevelwithoutanoperatorpresent.Specificationsinthisstandardfortheresponsetosoundwavesapplywithoutanoperatorpresentinthesoundfield.
【中国标准分类号】:L31
【国际标准分类号】:17_140_50
【页数】:46P.;A4
【正文语种】:英语