Designation:E2019−03(Reapproved2013)StandardTestMethodforMinimumIgnitionEnergyofaDustCloudinAir1ThisstandardisissuedunderthefixeddesignationE2019;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddeterminestheminimumignitionenergyofadustcloudinairbyahighvoltagespark.1.2TheMinimumIgnitionEnergy(MIE)ofadust-cloudisprimarilyusedtoassessthelikelihoodofignitionduringprocessingandhandling.Thelikelihoodofignitionisusedtoevaluatetheneedforprecautionssuchasexplosionpreventionsystems.TheMIEisdeterminedastheelectricalenergystoredinacapacitorwhich,whenreleasedasahighvoltagespark,isjustsufficienttoignitethedustcloudatitsmosteasilyignitableconcentrationinair.ThelaboratorytestmethoddescribedinthisstandarddoesnotoptimizealltestvariablesthataffectMIE.SmallerMIEvaluesmightbedeterminedbyincreasingthenumberofrepetitionsoroptimizingthesparkdischargecircuitforeachdusttested.1.3Inthistestmethod,thetestequipmentiscalibratedusingaseriesofreferencedustswhoseMIEvaluesliewithinestablishedlimits.Oncethetestequipmentiscalibrated,therelativeignitionsensitivityofotherdustscanbefoundbycomparingtheirMIEvalueswiththoseofthereferencedustsorwithdustswhoseignitionsensitivitiesareknownfromexperience.X1.1ofthistestmethodincludesguidanceonthesignificanceofminimumignitionenergywithrespecttoelectrostaticdischarges.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection8.2.ReferencedDocuments2.1ASTMStandards:2D3173TestMethodforMoistureintheAnaly...
