Designation:E2904−12StandardPracticeforCharacterizationandVerificationofPhasedArrayProbes1ThisstandardisissuedunderthefixeddesignationE2904;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisstandardpracticecoversmeasurementproceduresforevaluatingcertaincharacteristicsofphased-arrayultrasonicprobesthatareusedwithphased-arrayultrasonicexaminationinstrumentation.1.2Thisstandardpracticedescribesmeansforobtainingperformancedatathatmaybeusedtodefinetheacousticandelectricresponsesofphased-arrayultrasonicprobesincludingcontact(withorwithoutawedge)andimmersionlinearphased-arrayprobesusedforultrasonicnondestructivetestingwithcentralfrequenciesrangingfrom0.5MHzto10MHz.Frequenciesoutsideofthisrangemayusethesamemethodsbutthetestingequipmentmayvary.1.3Whenultrasonicvaluesdependentonmaterialarespeci-fiedinthisdocument,theyarebasedoncarbonsteelwithanultrasonicwavepropagationspeedof5920m/s(650m/s)forlongitudinalwavemodesand3255m/s(630m/s)fortrans-verseorshearwavemodes.1.4Thisdocumentdescribesthecharacterizationandveri-ficationproceduresthataretobecarriedoutattheendstageofthemanufacturingprocessofphasedarrayprobes.Thisdocu-mentdoesnotdescribethemethodsoracceptancecriteriausedtoverifytheperformanceoftheentirephasedarrayultrasonicinstrumentandprobe.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E1065PracticeforEvaluatingCharacteristicsofUltrasonicSearchUnitsE1316TerminologyforNondestructiveExaminations3.Terminology3.1Definitions:3.1...
