>> P.559
DigitalindicatorDigitalindicatorDigitalindicatorSupportingSupportingstandstandSupportingstandReferencestandardReferencestandard(Micrometerhead(MicrometerheadorotherlengthRefetardorotherlengthmeasuringunit)(Mcromerdmeasuringunit)orotherlngthmeasuringunit)DigitalindicatorDigialindicatorDigitalindicatorSupportingSupportingstandstandSupportingstandWorktableWorktable(gaugeblock)(gaugeblock)Worktable(gaugeblock)DigitalindicatorDigitalidicatorDigitalindicatorSupportingSupportingstandstandSupportingstandToppantypeToppantypespringscaleorspringscaleorforcegageTpanypeforcegagespringscaleorforcegageDialIndicators,DigitalIndicatorsandTestIndicatorsDigitalindicatorsJISB7563:2021(ExtractfromJIS/JapaneseIndustrialStandards)Measuringmethod(zero-pointfixed)Evaluationmethod(performanceevaluationbymovingthezeropoint)MeasurementexamplesSetthedigitalindicatoronthesupportingstandandreadtheindicationerrorwhilegraduallyretractingthespindle.Next,afterretractingthespindleforatleast0.1mm,extendthespindlegraduallyandreadtheindicationerroratthesamemeasurementpointintheretractdirection.a)Thepointsofmeasurementforthepartialmeasuringrangeshallbeatleast6points(preferablyequallyspaced)withinarangeof50timestheminimumreadingfromthezeropoint,includingthezeropoint.b)Thepointsofmeasurementfortheentiremeasuringrangeshallconsistof11ormorepoints(preferablyequallyspaced),includingthezeroandendpoints.Forhowtoreadtheindicationerror,eitherreadtheinputquantityofthemeasuringinstrumentwiththedigitalindicatorvalue,orreadthedigitalindicatorvalueaccordingtothemovingamountofthemeasuringinstrument.c)Obtainthedifferencebetweenthemaximumandtheminimumvaluesofindicationerrorofallmeasurementpointsofthepartialmeasuringrangeintheforwarddirection.Obtainthedifferencebetweenthemaximumandtheminimumvaluesofindicationerrorofallmeasurementpointsoftheentiremeasuringrangeintheforwarddirection.a)Includethemeasurementpointsinthepartialmeasuringrangewhendeterminingtheindicationerrorfortheentiremeasuringrange.Obtainthemaximumdifferenceinreferencetotheindicationerroratthesamemeasuringpointinbothforwardandbackwarddirectionsforthepartialmeasuringrangeandentiremeasuringrange.Item.Indicationerroroveraportionofthemeasuringrange(intheforwarddirection)Indicationerrorovertheentiremeasuringrange(intheforwarddirection)EMPERetraceerrorHMPEIndicationerrorMinimumreading(mm)Partialmeasuringrange(mm)0.010.50.0010.050.00050.025Measuringrange(mm)15orlessIndicationerroroveraportionofthemeasuringrange(intheforwarddirection)PMPE(µm)Indicationerrorovertheentiremeasuringrange(intheforwarddirection)EMPE(µm)RetraceerrorHMPE(µm)RepeatabilityRMPE(µm)15orlessOver15andOver30andOver60andupto30upto60upto100202040402020Over15andOver30andOver60andupto30upto60upto10033553215orlessOver15andOver30andOver60andupto30upto60upto100335532CharacteristicIndicators13-32Mitutoyo’sResponsetoDigitalIndicatorsJISB7563:2021•Weguaranteetheaccuracyofcompletedproductsbyinspectingthemintheverticalposture.Standard-attachedinspectioncertificateincludesinspectiondata.•Weissuepaid-forcalibrationresultsforhorizontaloroppositepostureifrequired.RepeatabilityRMPESetthedigitalindicatoronthesupportingstand,retractthecontactpointintoanypositionwithinthemeasuringrange,andactuateitfivetimesinthebackwarddirection.Movethecontactpointquicklyandslowlyandreadtheindicatedvalueeachtime.Obtainthemaximumdifferenceamongfiveindicationvalues.MeasuringforceMPLSetthedigitalindicatoronthesupportingstand,retractandextendthespindlecontinuouslyandgradually,andreadthemeasuringforceatthezeroandendpoints.Obtainthemaximummeasuringforce,theminimummeasuringforce,andthedifferenceofthemeasuringforceinbothretractandextenddirectionsatthesamemeasurementpoint.Digitalindicatormaximumpermissibleerror(MPE)
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