【英文标准名称】:StandardTestMethodforDeterminingtheOpacityofaPlumeintheOutdoorAmbientAtmosphere
【原文标准名称】:在室外环境大气中测定羽烟不透明度的标准试验方法
【标准号】:ASTMD7520-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:digitalcamera;digitalimage;digitalstillcamera;opacity
【摘要】:Airpermitsfromregulatoryagenciesoftenrequiremeasurementsofopacityfromstationaryairpollutionpointsourcesintheoutdoorambientenvironment.OpacityhasbeenvisuallymeasuredbycertifiedsmokereadersinaccordancewithUSEPA(USEPAMethod9).DCOTisalsoamethodtodetermineplumeopacityintheoutdoorambientenvironment.TheconceptofDCOTwasbasedonpreviousmethoddevelopmentusingDigitalStillCamerasandfieldtestingofthosemethods.,ThepurposeofthisstandardistosetaminimumlevelofperformanceforproductsthatuseDCOTtodetermineplumeopacityinambientenvironments.1.1Thistestmethoddescribestheprocedurestodeterminetheopacityofaplume.Theaforementionedplumeiscausedbyparticulatematteremittedfromastationarypointsourceintheoutdoorambientenvironmentusingdigitalimageryandassociatedsoftwareandhardware.1.2TheopacityofemissionsisdeterminedbytheapplicationofaDigitalCameraOpacityTechnique(DCOT)thatconsistsofaDigitalStillCamera,AnalysisSoftware,andtheOutputFunctionx2019;scontenttoobtainandinterpretdigitalimagestodetermineandreportplumeopacity.1.3Thismethodissuitabletodeterminetheopacityofplumesfromzero(0)percenttoonehundred(100)percent.1.4Thistestmethodisnotapplicabletostackswithinternaldiametersgreaterthan7.0ft.1.5Conditionsthatshallbeconsideredwhenusingthismethodtoobtainthedigitalimageoftheplumeincludetheplumex2019;sbackground,theexistenceofcondensedwaterintheplume,orientationoftheDigitalStillCameratotheplumeandthesun(seeSection8).1.6ThisstandarddescribestheprocedurestocertifytheDCOT,hardware,software,andmethodtodeterminetheopacityoftheplumes.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:21P.;A4
【正文语种】:英语