【英文标准名称】:StandardPracticeforMeasuringPhotometricCharacteristicsofRetroreflectors
【原文标准名称】:测量反光境的光度特性的标准实施规程
【标准号】:ASTME809-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E12.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:photometriccharacteristics;photometricmeasurements;photometricrange;retroreflective;retroreflection;retroreflectors;Color--retroreflection/retroreflectors;Spectrophotometry--goniophotometry;Lighttransmissionandreflection;Photometry;Retrore
【摘要】:Thispracticedescribesproceduresusedtomeasurephotometricquantitiesthatrelatetothevisualperceptionofretroreflectedlight.Themostsignificantusageisintherelationtothenighttimevehicleheadlamp,retroreflector,anddriver''seyegeometry.ForthisreasontheCIEStandardSourceAisusedtorepresentatungstenvehicleheadlampandthereceptorhasthephotopic,V(x03BB;),spectralresponsivitycorrespondingtothelightadaptedhumaneye.Althoughthegeometrymustbespecifiedbytheuser,itwill,ingeneral,correspondtotherelationbetweenthevehicleheadlamp,theretroreflector,andthevehicledriver''seyeposition.1.1Thispracticedescribesthegeneralproceduresforinstrumentalmeasurementofthephotometriccharacteristicsofretroreflectivematerialsandretroreflectivedevices.1.2ThispracticeisacomprehensiveguidetothephotometryofretroreflectorsbutdoesnotincludegeometrictermsthataredescribedinPracticeE808.1.3Thispracticedescribestheparametersthatarerequiredwhenstatingphotometricmeasurementsinspecifictestsandspecificationsforretroreflectors.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N35
【国际标准分类号】:17_180_20
【页数】:11P.;A4
【正文语种】:英语


【英文标准名称】:Solidbiofuels-Determinationofmoisturecontent-Ovendrymethod-Moistureingeneralanalysissample
【原文标准名称】:固体生物燃料.水分含量的测定.烘干法.一般分析样本中的水分
【标准号】:BSEN14774-3-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-01-31
【实施或试行日期】:2010-01-31
【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】:分析;分析样品;生物燃料;生物量;含量;含量测定;烘干;材料试验;数学计算;烘炉干燥;试样;固体燃料;试样制备;试验报告;水;含水量
【英文主题词】:Analysis;Analysissamples;Biofuels;Biomass;Content;Determinationofcontent;Drying;Materialstesting;Mathematicalcalculations;Ovendrying;Samples;Solidfuels;Specimenpreparation;Testreports;Water;Watercontent
【摘要】:ThisEuropeanStandarddescribesthemethodofdeterminingthemoistureintheanalysissamplebydryingthesampleinanoven.ItisintendedtobeusedforgeneralanalysissamplesaccordingtoCEN/TS14780.Themethoddescribedinthisdocumentisapplicabletoallsolidbiofuels.NOTEThetermmoisturecontentwhenusedwithbiomassmaterialscanbemisleadingsinceuntreatedbiomassfrequentlycontainsvaryingamountsofvolatilecompounds(extractives)whichmayevaporatewhendeterminingthemoisturecontentofthegeneralanalysissamplebyovendrying(seeBibliography).Sincesmallparticlesizebiofuelsareveryhygroscopic,theirmoisturecontentwillvarywithchangeofhumidityoftheatmosphereandthereforethemoistureoftheanalysessampleshouldalwaysbedeterminedsimultaneouslywhenportionsareweighedoutforotheranalyticaldeterminations,forexamplecalorificvalue,carbon,nitrogen.
【中国标准分类号】:D20
【国际标准分类号】:75_160_10
【页数】:10P.;A4
【正文语种】:英语