Quick Guide to Precision Measuring Instruments
PG28Dial Indicators and Digital Indicators+ 100Indication ErrorIndication Error0.511.522.533.544.55Measuring range678910 mmµm0– 10Max indication errorForwardRetrace― Figure A ―+ 1000.511.522.533.544.55Measuring range678910 mmµm0– 10Max indication errorForwardRetrace― Figure B ―(1)(2)Dial Indicator Standard B7503:2011 Floating zero (Commentary) The old JIS Standard evaluated the maximum indication error as the maximum error found within the measuring range with the datum point taken as the start of the measuring range, as shown in Figure A below. On the other hand, the new JIS standard evaluates the maximum indication error as the difference between the two maximum errors found within the measuring range from an arbitrary datum point, which may conveniently be taken as the start of the measuring range, as shown in Figure B below. Mitutoyo's Response to Dial Indicator Standard B7503: 2011•We guarantee the accuracy of completed products by inspecting them in the vertical posture. The inspection certicate supplied includes inspection data. •We can supply paid-for inspection certicates applying to a horizontal or upside-down orientation if required. •The old JIS Standard indicates that “the uncertainty of calibration” is evaluated inclusively. On the other hand, the new JIS Standard indicates that conformity or nonconformity to specication is veried based on JIS B 0641-1 and that it is preferred that the uncertainty is evaluated based on ISO/TS 14253-2 and ISO/IEC Guide 98. Therefore, we perform shipping inspection of dial indicators inclusive of the uncertainty of calibration as usual.