F-94FMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.F-94FOrientationRemarksVertical (contact point downward)—Lateral(spindle horizontal)If measurement is performed in the lateral orientation, or upside-down orientation, the measuring force is less than in the vertical orientation. In this case be sure to check the operation and repeatability of the indicator.For guaranteed-operation specications according to the operating orientation refer to the specic product descriptions in the catalog.Upside-down (contact point upward)The accuracy specication in the range of 0.2 mm from the end of the stroke is not guaranteed for Digimatic indicators. When setting the zero point or presetting a specic value, be sure to lift the spindle at least 0.2 mm from the end of the stroke.GroundGroundGround4567893210456789321045678932100.2mmMeasuring orientationSetting the origin of a Digimatic indicatorNotes on using a dial indicator or Digimatic indicator•Do not lubricate the spindle. Doing so might cause dust to accumulate, resulting in a malfunction.•If the spindle movement is poor, wipe the upper and lower spindle surfaces with a dry or alcohol-soaked cloth. If the movement is not improved by cleaning, contact Mitutoyo for repair.•Before making a measurement or calibration, conrm if the spindle moves upward and downward smoothly, and stability of the zero point. 0.2 mmDial Indicator Standard B7503: 2017 (Extract from JIS/Japanese Industrial Standards)ItemModelMeasuring method(zero-point xed)Evaluation method(performance evaluation by moving the zero point)Measurement examplesIndication errorIndication error over the entire measuring rangeOne-revolution dial indicator and multi-revolution dial indicatorSet the dial indicator on the supporting stand, and read the indication error*1 of the next point while gradually retracting the spindle.- Every 1/10 revolution for the rst two revolutions*2- Every half revolution from two to ve revolutions- Every revolution from ve to ten revolutions- Every ve revolutions from 10 to 50 revolutions- Every ten revolutions after 50 revolutionsNext, after retracting the spindle for more than three graduations of the long hand, extend the spindle gradually and read the indication error at the same measurement point in the retract direction. Obtain the difference between the maximum and the minimum values of indication error of all measurement points in both retract and extend directions.1/10 revolution indication errorDuring the rst two revolutions in both retract and extend directions, obtain the maximum difference of the indication error among the adjacent measurement points per 1/10 revolutions*3.1/2 revolution indication errorMulti-revolution dial indicatorDuring the rst ve revolutions in both retract and extend directions, obtain the maximum difference of the maximum and the minimum indication errors over the measuring range per 1/2 revolutions.1 revolution indication errorDuring the rst ten revolutions in both retract and extend directions, obtain the maximum difference of the maximum and the minimum indication errors over the measuring range per one revolution.Retrace errorOne-revolution dial indicator and multi-revolution dial indicatorObtain the maximum difference of all the measuring points in reference to the indication error at the same measuring point in both forward and backward directions.RepeatabilityOne-revolution dial indicator and multi-revolution dial indicatorSet the dial indicator on the supporting stand, retract the spindle at a desired position within the measuring range. Then, extend the spindle quickly and slowly ve times and read each value.Obtain the maximum difference among ve indication values.Measuring forceSet the dial indicator on the supporting stand, retract and extend the spindle continuously and gradually, and read the measuring force at the zero and end points.Obtain the maximum measuring force, the minimum measuring force, and the difference of the measuring force in both retract and extend directions at the same measurement point.*1 For how to read the indication error, either read the input quantity of the measuring instrument aligning the long hand to the graduation, or read the indication value of the dial indicator according to the moving amount of the measuring instrument. *2 With the one-revolution dial indicator, read the indication error per 10 graduations. *3 With the one-revolution dial indicator, obtain the maximum difference of the indication error in the interval of adjacent 10 graduations.Supporting standMeasuring stage(Gauge block) Dial indicatorDial indicatorTop pan type spring scale or force gageSupporting standSupporting standDial indicatorMicrometer head or other length measuring unit
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