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Measure/Headtest Dialog Box
Measure/Headtest Screen A and B are printed out from our Measure/Headtest selection in our windows
software. In this screen, you will see Lasercheck values displayed beside numbers 1 to 37. Numbers 1 to 35
are voltage readings from the 35 array detectors. Also displayed is a sum of voltages from all detectors and
a “relative” height standoff calculation. Nothing is displayed beside number 40. Measure/Headtest can be
used to assist in alignment of the Lasercheck head.
Measure/Headtest Screen A
Measure/Headtest Screen A shows a well-aligned smoother surface, Ra of about 5 microinches. Because the
surface is relatively smooth, a well-defined specular beam is maintained as it bounces off the surface into
Lasercheck. It displays itself as the largest voltage readings in the array at # 6. A relative indication of the
Lasercheck standoff height from the surface is also indicated .
Note: this Standoff Distance calculation is a
relative reading only; the absolute values are not correct.
If Lasercheck were moved away from the
surface, the specular laser beam would move up to detectors # 5, 4, 3, 2, 1 etc. and the standoff reading
indication would increase. If Lasercheck were moved closer to the surface, the specular laser beam would
move down to detectors # 7, 8, 9 etc. and the standoff reading indication would decrease.
