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Dial Indicators JIS B 7503: 2017 ( Japan Industrial Standards )
 Methods of measuring of performance
Measurement item Applicable type Measuring method
(Fixed zero method)
Evaluation method
(Transferring zero method)
Example of
measurement
 Error of
 indication

 Error of
 indication
 over the
 whole
 measuring
 range

 Dial gauge
 with multiple
 revolutions and
 dial gauge with
 partial revolution

 Fix the dial gauge rigidly in a
 supporting stand, move the
 contact element successively
 in the forward direction, and
 read the errors of indication
a)
 at the following measuring
 points.


E From the starting point to
   2nd revolution, at every 1/10
   revolution of the pointer
b)
E From 2nd to 5th revolution,
   at every 1/2 revolution of
   the pointer
E From 5th to 10th revolution,
   at every one revolution of
   the pointer
E From 10th to 50th revolution,
   at every 5 revolutions
E From 50th revolution
   and onward, at every 10
   revolutions

 After pressing in the contact
 element so that the pointer
 shifts by three or more scale
 divisions from the end point of
 the measuring range, move
 the contact element in the
 retrace direction successively
 and read the errors of
 indication at the same points
 as measured in the forward
 direction.

 Obtain the difference between the
 maximum and minimum errors
 of indication at all measuring
 points in both forward and retrace
 directions.

 Example of measurement

 Error of
 indication
 over 1/10
 revolution

 Obtain the maximum value of
 difference in errors of indication
 between any two adjacent
 measuring points at every 1/10
 rotation from the starting point to
 2nd revolution in both forward and
 retrace directions.
c)


 Error of
 indication
 over 1/2
 revolution

 Dial gauge
 with multiple
 revolutions

 Obtain the maximum value of
 difference between the largest and
 smallest errors of indication read
 at every 1/2 revolution within the
 measuring range from the starting
 point to 5th revolution, in both
 forward and retrace directions.


 Error of
 indication
 over one
 revolution

 Obtain the maximum value of
 difference between the largest and
 smallest errors of indication read
 at every one revolution within the
 measuring range from the starting
 point to 10th revolution, in both
 forward and retrace directions.


 Hysteresis
 Error 

 Dial gauge
 with multiple
 revolutions and
 dial gauge with
 partial revolution

 Obtain the maximum value of
 difference between errors of
 indication taken in the forward
 direction and those taken at the
 corresponding measuring points in
 the retrace direction.

Repeatability
 Dial gauge
 with multiple
 revolutions and
 dial gauge with
 partial revolution

 Fix the dial gauge in a
 supporting stand, and after
 pressing in the contact
 element to a desired position
 within the measuring range,
 allow it to retract quickly or
 slowly five times and take a
 reading at each point.

 Determine the maximum difference
 between the five indications
 obtained.
Example of measurement
Measuring force
 Fix the dial gauge in a
 supporting stand, and move
 the contact element in the
 forward and retrace directions
 continuously and gradually
 and take measurements of
 the measuring force at the
 starting point and end point.

 Determine the maximum value of
 the readings (maximum measuring
 force) and minimum value of the
 readings (minimum measuring
 force) and also determine the
 differences in the readings
 between corresponding measuring
 points in forward and retrace
 directions.
Example of measurement
Notes a) For reading of errors, either read the input quantity of the measuring device with the pointer of the dial gauge adjusted
at a scale graduation, or read the indication of the dial gauge according to the displacement of the measuring device.
b) For dial gauge with partial revolution, read errors at every 10 scale divisions.
c) For dial gauge with partial revolution, obtain the maximum value of difference in errors of indication between any two
adjacent measuring points at every 10 scale divisions.
Dial Indicators JIS B 7503: 2017 ( Japan Industrial Standards )
 Performance of vertical (standard type) dial gauges with bezel diameters not less than 50mm
    [maximum permissible error (MPE)]
Performance Scale interval ( mm )
0.01 0.005 0.001
Measuring range ( mm )
1 or
under
Over
1 up
to and
incl. 3
Over
3 up
to and
incl. 5
Over
5 up
to and
incl. 10
Over
10 up
to and
incl. 20
Over
20 up
to and
incl. 30
Over
30 up
to and
incl. 50
Over
50 up
to and
incl. 100
5 or
under
1 or
under
Over
1 up
to and
incl. 2
Over
2 up
to and
incl. 5
Error of
indication
( MPE )
( m )
1/10 revolution 5 5 5 5 8 10 10 12 5 2 2 3.5
1/2 revolution 8 8 9 9 10 12 12 17 9 3.5 4 5
one revolution 8 9 10 10 15 15 15 20 10 4 5 6
Whole
measureing
range
8 10 12 15 25 30 40 50 12 5 7 10
Hysteresis error
( MPE
H ) ( m )
3 3 3 3 5 7 8 9 3 2 2 3
Repeatability
( MPE
R ) ( m )
3 3 3 3 4 5 5 5 3 0.5 0.5 1
For the MPE of dial gauge with partial revolution, the error of indication over 1/2 revolution or one revolution is not specified.
 Performance of dial gauges with bezel diameters less than 50mm and horizontal (back plunger type) dial gauges
    [maximum permissible error (MPE)]
Performance Scale interval ( mm )
0.01 0.005 0.002 0.001
Measuring range ( mm )
1 or under Over 1 up to
and incl. 3
Over 3 up to
and incl. 5
Over 5 up to
and incl. 10
5 or under 1 or under 1 or under
Error of
indication
( MPE )
( m )
1/10 revolution 8 8 8 9 6 2.5 2.5
1/2 revolution 11 11 12 12 9 4.5 4
one revolution 12 12 14 14 10 5 4.5
Whole measureing
range
15 16 18 20 12 6 5
Hysteresis error
( MPE
H ) ( m )
4 4 4 5 3.5 2.5 2
Repeatability
( MPE
R ) ( m )
3 3 3 3 3 1 1
For the MPE of dial gauge with partial revolution, the error of indication over 1/2 revolution or one revolution is not specified.
 Measuring force of mechanical dial gauge [maximum permissible limit (MPL)]
Performance Measuring range ( mm )
10 or under Over 10 up to
and incl. 30
Over 30 up to
and incl. 50
Over 50 up to
and incl. 100
Maximum ( N ) 2.0 max 2.5 max 3.0 max 3.5 max
Minimum ( N ) To be defined by the manufacturer.
Hysteresis ( N )



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