Designation:D5390−21StandardTestMethodforOpen-ChannelFlowMeasurementofWaterwithPalmer-BowlusFlumes1ThisstandardisissuedunderthefixeddesignationD5390;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoversmeasurementofthevolumetricflowrateofwaterandwastewaterinsewersandotheropenchannelswithPalmer-Bowlusflumes.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1941TestMethodforOpenChannelFlowMeasurementofWaterwiththeParshallFlumeD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3858TestMethodforOpen-ChannelFlowMeasurementofWaterbyVelocity-AreaMethodD5242TestMethodforOpen-ChannelFlowMeasurementofWaterwithThin-PlateWeirs2.2ISOStandards:3ISO4359LiquidFlowMeasurementinOpenChannels—Rectangular,TrapezoidalandU-ShapedFlumesISO555LiquidFlowMeasurementsinOpenChannels—DilutionMethodsforMeasurementofSteadyFlow—ConstantRateInjectionMethod32.3ASMEStandard:4FluidMetersTheirTheoryandApplication3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthisstandard,refertoTer...
