910-198E
8/19/03
Page 2-2
Model 8500
1/16" (1.6mm) diameter target ball
Useful for applications that involve intricate contours. While the small
size is efficient for measuring difficult shapes, it is less accurate than
the 1/8" ball and has a restricted thickness range.
Use only Panametrics-NDT’ target balls with the Magna-Mike 8500 as
other seemingly identical balls may cause inaccurate measurements.
2.2
When to Calibrate
Perform a Ball Calibration:
•
Daily or at the start of a work session
•
If changing to a different target ball size
Table 2-1: Target Ball Measurements and Accuracy
Target Ball
Diameter
Maximum
Thickness Range
Measurement
Accuracy*
Minimum
Surface Radius
3/16"
(4.76mm)
0.250"
(6.35mm)
1%
3/32"
(2.38mm)
1/8"
(3.18mm)
0.180"
(4.57mm)
2%
1/16"
(1.59mm)
1/16"
(1.59mm)
0.090"
(2.29mm)
3%
1/32"
(0.79mm)
Note: * Reflects accuracy after Multi-Point Calibration.
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