21
2 Basic Measuring Methods
No. 99MAF600B
2.3
Measuring the Inner Diameter
Measure the diameter (inner diameter) of a hole. For the inner diameter measurement, obtain the low-
est and highest points of the hole to measure the distance. As an example, the procedure for measur-
ing the inner diameter of A (40 mm), shown below, is explained.
A (40 mm)
ABS reference
Highest point
Lowest point
Tips
Depending on the method set for terminating the scanning measurement, the operating procedures vary slight-
ly. First, conrm the method set for terminating the scanning measurement. For details about changing the
settings, "3.4 Setting the Terminating Method for Scanning Measurements" (page 43)
1
Press .
» will be displayed on the upper left of the LCD screen.
2
Obtain the lowest point of the hole.
If the scanning measurement termination method is set to [Auto] (automatic termination)
1 Face the ball of the probe towards the
left or right of the center bottom surface
of the hole, and slowly bring it into con-
tact with the surface until a beep sound
is made.
Maintain contact with the ball.
» [0.000] will be displayed on the
LCD screen.
Bring the ball into contact within 0.5 mm of
the lowest point. Measuring with a wider
range may increase measurement errors.
2 Secure the probe up/down wheel with
your hand or the clamp screw in order to
prevent it from moving.