Elcometer111-7F铁素体检测仪TheElcometer111-7Fisahand-heldmagneticgaugeforcheckingthedeltaferritecontentinstainlesssteelweldmetal.Itispre-calibratedandsimpletouse.ThereadingsareinFerriteNumber(FN)inaccordancewithWRCandIIWrecommendati***.OperationPlacethenoseofthegaugeontotheweldmetalandrestthemiddleofthegaugeonadjacentparentmetal.Turnthecentralwheeltothezeroendofthescale,nowturnitintheoppositedirectionuntilthemagnetclicksoff.Readthevalue.WhatisFerrite?Aminimumferritecontentinausteniticstainlesssteelweldmetalpreventsmicrofissuresandhotcracks.Toomuchferritecanleadtocorrosionorembrittlementathightemperatures.Itisamagneticmaterialinanessentiallynon-magneticmetalandsocanbemeasuredbytheforceofattractionduetoamagnet.FerriteNumberAftermuchtestingaroundtheworld,ithasbeendecidedthatitisimpossibletodetermineaccuratelythetrueferritecontentofstainlesssteelweldmetals.Previousfiguresofpercentagecontentwereverydependentontheirsource,themeasuringinstrumentusedandsitscalibration.SoFerriteNumberswereestablishedtodefineferritequantityandarerelatedtotheferritequantityofanequivalentlymagneticweldmetalCalibrationThecalibrationofagaugeissuchthattheferritereadingcanberelatedtotheseperationofthegauge'smagnetfromlowcarbonmildsteelplate.Theprimarystandardisthicknessandthesecondarystandardisferritesamples,andtheCalibrationCertificatesuppliedwiththeElcometer111-7Frelatesthegaugereadingtobothstanda***.Elcometer111-7FFerriteIndicatorRange0to30FN(WRC)Accuracy+/-10%ofthereadingor+/-1FNModelDescriptionPartNumberElcometer111-7FElcometer111-7FFerriteIndicatorA111A-7F-)