Designation:D923−15StandardPracticesforSamplingElectricalInsulatingLiquids1ThisstandardisissuedunderthefixeddesignationD923;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thesepracticescoversamplingofnewelectricalinsu-latingliquidsincludingoils,askarels,silicones,syntheticliquids,andnaturalesterinsulatingliquidsaswellasthoseinsulatingliquidsinserviceorsubsequenttoserviceincables,transformers,circuitbreakers,andotherelectricalapparatus.Thesepracticesapplytoliquidshavingaviscosityoflessthan6.476×10-4m2/s(540cSt)at40°C(104°F).1.2Representativesamplesofelectricalinsulatingliquidsaretakenfortestspecimenssothatthequalitypertinenttotheirusemaybedetermined.Thequalityindifferentportionsofagivencontainer,ortheaveragequalityofthewholebulkmaybeascertainedifdesired.1.3ThevaluesstatedinSIunitsareregardedasthestandardwhereapplicable.InchpoundunitsareusedwherethereisnoSIequivalent.1.4Thesepracticesalsoincludespecialtechniquesanddevicesforsamplingfordissolvedgases-in-oil(DGA)(D3612),water(D1533)andparticles(D6786).1.5Foreaseofuse,thisdocumenthasbeenindexedasfollows:SectionTitleSection/ParagraphMandatoryConditionsandGeneralInformationSection5DescriptionofSamplingDevicesandContainersSection6,AnnexA1,AppendixX2MostFrequentlyUsedSamplingTechniquesforElectricalApparatusCollectingSamplesfromElectricalEquipmentUsingBottlesandCansSection7,AppendixX1,AppendixX2CollectingSamplesfromElectricalEquipmentUsingGlassSyringes(DGAandWaterAnalysis)Section8SectionTitleSection/ParagraphCollectingSamplesfromElectricalEquipmentUsingStainlessSteelCylinders(DGAandWaterAnalysis)Section9SamplingofCans,Drums,TankCars,TankTrucksandSmallElectricalEquipmentSamplingUsingtheDip-TypeDevice(drumthief)Section10SamplingUsingt...
