8/19/03
910-198E
Model 8500
Page 3-1
3
MEASUREMENTS
Thickness measurements can be made once the Magna-Mike 8500 is
calibrated for a particular target ball size. To measure a test piece,
simply place the probe tip on one side of the material, and place the
target ball on the other side near the probe tip. The ball will be
attracted to the probe tip by a magnetic field. Once the ball is within
range, the Magna-Mike 8500 will begin to display thickness values
providing the tip and ball are both in contact with the material. The
ball must be able to move freely and the material kept perpendicular to
the probe axis, as shown in Figure 3-1. Inaccurate measurements may
result from ball or probe tip obstructions, or poor probe alignment, as
shown in Figures 3-2 to 3-5.
To optimize the gage’s accuracy, be careful to:
•
Utilize proper measurement techniques
•
Measure non-magnetic material
•
Maintain gage calibration
Using the probe in the stand is the best method to measure material.
This method allows gravity and probe attraction to work together to
ensure good alignment of the target ball with the probe tip.
Caution:
Avoid contact with magnetic metals or alloys (iron,
steel, etc...) to ensure accurate operation of the Magna-
Mike 8500.
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