Designation:D6176−97(Reapproved2015)StandardPracticeforMeasuringSurfaceAtmosphericTemperaturewithElectricalResistanceTemperatureSensors1ThisstandardisissuedunderthefixeddesignationD6176;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeprovidesprocedurestomeasurerepresen-tativenear-surfaceatmospheric(outdoorair)temperatureformeteorologicalpurposesusingcommonlyavailableelectricalthermometershousedinradiationshieldsmountedonstation-aryorportablemastsortowers.1.2Thispracticeisapplicableformeasurementsoverthetemperaturerangenormallyencounteredintheambientatmosphere,–50to+50°C.1.3Airtemperaturemeasurementsystemsincludearadia-tionshield,resistancethermometer,signalcables,andassoci-atedelectronics.1.4Measurementscanbemadeatasinglelevelforvariousmeteorologicalpurposes,attwoormorelevelsforverticaltemperaturedifferences,andusingspecialequipment(atoneormorelevels)forfluctuationsoftemperaturewithtimeappliedtofluxorvariancemeasurements.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresE344TerminologyRelatingtoThermometryandHydrom-etryE644TestMethodsforTestingIndustrialResistanceTher-mometersE1137/E1137MSpecificationforIndustrialPlatinumResis-tanceThermometers3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthispractice,refertoTerminologyD1356andE344.Somedefinitionsarerepeatedinthissectionforthereader’sconvenience.3.1.2connectingwires—thewireswhichrun...
