Designation:D6764−02(Reapproved2019)StandardGuideforCollectionofWaterTemperature,Dissolved-OxygenConcentrations,SpecificElectricalConductance,andpHDatafromOpenChannels1ThisstandardisissuedunderthefixeddesignationD6764;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidedescribesprocedurestocollectcross-sectionalmeansoftemperature,dissolvedoxygen(DO),spe-cificelectricalconductance(SC),andpHofwaterflowinginopenchannels.1.2Thisguideprovidesguidelinesforpreparationandcalibrationoftheequipmenttocollectcross-sectionalmeansoftemperature,DO,SC,andpHofwaterflowinginopenchannels.1.3Thisguidedescribeswhatequipmentshouldbeusedtocollectcross-sectionalmeansoftemperature,DO,SC,andpHofwaterflowinginopenchannels.1.4Thisguidecoversthecross-sectionalmeansoftemperature,DO,SC,andpHoffreshwaterflowinginopenchannels.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D888TestMethodsforDissolvedOxygeninWaterD1125TestMethodsforElectricalConductivityandResis-tivityofWaterD1129TerminologyRelatingtoWaterD1293TestMethodsforpHofWaterD4410TerminologyforFluvialSedimentD4411GuideforSamplingFluvialSedimentinMotionD5464TestMethodforpHMeasurementofWaterofLowConductivity3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthisstandard,refertoTerminologi...
