DeFelsko PosiTector UTG Guide Rapide page 9

sound velocity. The first three adjustment methods make
1-point calibration adjustments to optimize the linearity of the
PosiTector UTG over small ranges. The fourth method makes a 2-
point calibration adjustment to allow for greater accuracy over
a large range.
Thickness
The most common method of adjustment is to measure a sample
of known thickness. Select a reference standard of material as
close as possible in composition to the intended application. For
best results, the thickness of the reference standard should be
equal to or slightly greater than the thickness of the part to be
measured.
Material
If a known thickness of the material is not available, but the
material is known, this quick adjustment allows the user to load
one of several preprogrammed material velocities.
Velocity
If the sound velocity for the test material is known, the Gage
can be adjusted to that specific sound velocity.
2 Pt Adjust
A 2-Point adjustment allows for greater accuracy while
simultaneously adjusting probe Zero. Select two reference
standards as close as possible in composition to the intended
application. For best results, the thickness of the thicker reference
standard should be equal to, or slightly greater than the thickest
part to be measured. The thickness of the thinner reference
standard should be equal to, or slightly less than the thinnest part
to be measured.
Cal Lock
When checked, the
are "locked" to prevent further user adjustments.
icon appears and the current Cal Settings
C
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