02/25/00
26 - Microsense II Model 5300 Gaging System
Setup Suggestions: Mastering
The Model 5300 gaging system is not limited only to measuring displacement variations and comparing two
displacement measurements to each other. The system can also be used for "mastering", which allows
measurements to take on absolute, rather than relative, values. When a reference surface is positioned at
a known distance from the gaging reference surface or from the probe, measurements are expressed as a
value relative to this known ("master") displacement. The height of the surface from the gaging surface is
then the sum of the master height and the value displayed on the meter. The probe-to-surface distance is
obtained by subtracting the system output from the displacement to the master surface.
In the figure shown below, the system is set up to provide a zero reading for the displacement to the master
part (Figure a). When the master part is replaced by a sample part (Figure b), the meter indicates a slightly
negative value. The height of the sample surface from the gaging surface is the sum of the known master
height and this negative value, or less than that of the known master height.
Zero Reading with Master
Nominal Standoff
Near Standoff
Far Standoff
Master
(a)
Reference Surface
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