>> P.13-34
Electricdigital-indicatorgageJISB7563:2021(ExtractfromJIS/JapaneseIndustrialStandards)DialIndicators,DigitalIndicatorsandTestIndicatorsMeasuringmethod(zero-pointfixed)Evaluationmethod(performanceevaluationbymovingthezeropoint)MeasurementexamplesSettheElectricdigital-indicatorgageonthesupportingstandandreadtheindicationerrorwhilegraduallyretractingthespindle.Next,afterretractingthespindleforatleast0.1mm,extendthespindlegraduallyandreadtheindicationerroratthesamemeasurementpointintheretractdirection.a)Thepointsofmeasurementforthepartialmeasuringrangeshallbeatleast6points(preferablyequallyspaced)withinarangeof50timestheminimumreadingfromthezeropoint,includingthezeropoint.b)Thepointsofmeasurementfortheentiremeasuringrangeshallconsistof11ormorepoints(preferablyequallyspaced),includingthezeroandendpoints.Forhowtoreadtheindicationerror,eitherreadtheinputquantityofthemeasuringinstrumentwiththeElectricdigital-indicatorgagevalue,orreadtheElectricdigital-indicatorgagevalueaccordingtothemovingamountofthemeasuringinstrument.c)Obtainthedifferencebetweenthemaximumandtheminimumvaluesofindicationerrorofallmeasurementpointsofthepartialmeasuringrangeintheforwarddirection.Obtainthedifferencebetweenthemaximumandtheminimumvaluesofindicationerrorofallmeasurementpointsoftheentiremeasuringrangeintheforwarddirection.a)Includethemeasurementpointsinthepartialmeasuringrangewhendeterminingtheindicationerrorfortheentiremeasuringrange.Obtainthemaximumdifferenceinreferencetotheindicationerroratthesamemeasuringpointinbothforwardandbackwarddirectionsforthepartialmeasuringrangeandentiremeasuringrange.Electricdigital-indicatorgageElectricdigital-indicatorgageElectricdigital-indicatorgageSupportingstandSupportingstandSupportingstandReferencestandard(MicrometerheadReferencestandardorotherlength(Micrometerheadmeasuringuni)Referencestandardorotherlength(Micrometerheadmeasuringunit)orotherlengthmeasuringunit)Electricdigital-indicatorgageElectricdigital-indicatorgageItem.Indicationerroroveraportionofthemeasuringrange(intheforwarddirection)PMPEIndicationerrorovertheentiremeasuringrange(intheforwarddirection)EMPERetraceerrorHMPEIndicationerrorRepeatabilityRMPESettheElectricdigital-indicatorgageonthesupportingstand,retractthecontactpointintoanypositionwithinthemeasuringrange,andactuateitfivetimesinthebackwarddirection.Movethecontactpointquicklyandslowlyandreadtheindicatedvalueeachtime.Obtainthemaximumdifferenceamongfiveindicationvalues.MeasuringforceMPLSettheElectricdigital-indicatorgageonthesupportingstand,retractandextendthespindlecontinuouslyandgradually,andreadthemeasuringforceatthezeroandendpoints.Obtainthemaximummeasuringforce,theminimummeasuringforce,andthedifferenceofthemeasuringforceinbothretractandextenddirectionsatthesamemeasurementpoint.Electricdigital-indicatorgagemaximumpermissibleerror(MPE)Electricdigital-indicatorgageSupportingstandSupportingstandSupportingstandWorktable(gaugeblock)Worktable(gaugeblock)Worktable(gaugeblock)Electricdigital-indicatorgageElectricdigital-indicatorgageElectricdigial-indicatorgageSupportingstandSupportingstandToppantypespringscaleorToppantypeforcegagespringscaleorforcegageSupportingstandToppantypespringscaleorforcegageMinimumreading(mm)Partialmeasuringrange(mm)0.010.50.0010.050.00050.025CharacteristicMeasuringrange(mm)15orlessIndicationerroroveraportionofthemeasuringrange(intheforwarddirection)PMPE(µm)Indicationerrorovertheentiremeasuringrange(intheforwarddirection)EMPE(µm)RetraceerrorHMPE(µm)RepeatabilityRMPE(µm)15orlessOver15andOver30andOver60andupto30upto60upto100202040402020Over15andOver30andOver60andupto30upto60upto10033553215orlessOver15andOver30andOver60andupto30upto60upto100335532Indicators13-34Mitutoyo’sResponsetoElectricdigital-indicatorgageJISB7563:2021Weguaranteetheaccuracyofcompletedproductsbyinspectingthemintheverticalposture.Standard-attachedinspectioncerticateincludesinspectiondata.Weissuepaid-forcalibrationresultsforhorizontaloroppositepostureifrequired.
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