Designation:D5720−95(Reapproved2009)StandardPracticeforStaticCalibrationofElectronicTransducer-BasedPressureMeasurementSystemsforGeotechnicalPurposes1ThisstandardisissuedunderthefixeddesignationD5720;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheprocedureforstaticcalibrationofelectronictransducer-basedsystemsusedtomeasurefluidpressuresinlaboratoryorinfieldapplicationsassociatedwithgeotechnicaltesting.1.2Thispracticeisusedtodeterminetheaccuracyofelectronictransducer-basedpressuremeasurementsystemsoverthefullpressurerangeofthesystemoroveraspecifiedoperatingpressurerangewithinthefullpressurerange.1.3Thispracticemayalsobeusedtodeterminearelation-shipbetweenpressuretransducersystemoutputandappliedpressureforuseinconvertingfromonevaluetotheother(calibrationcurve).Thisrelationshipforelectronicpressuretransducersystemsisusuallylinearandmaybereducedtotheformofacalibrationfactororalinearcalibrationequation.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsinparenthesesareforinforma-tiononly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection7.2.ReferencedDocuments2.1ANSI/ISAStandards:2S37.1(R1982)ElectricalTransducerNomenclatureandTer-minologyS37.3(R1982)SpecificationsandTestsForStrainGaugePressureTransducersS37.6(R1982)SpecificationsandTestsForPotentiometricPressureTransducersS37.10(R1982)SpecificationsandTestsForPiezoelectricPressureandSound-pressureTransducers3.Terminology3.1Termsmarkedwith“(ANSI,ISA-S37.1)”aretakendirectlyfromANSI/ISA-S37.1(R1982)andareincludedforthecon...
