DeFelsko PosiTector 6000 Notice D'instruction page 5

Calibration, Verification, and Adjustment
The PosiTector 6000 non-destructively measures the thickness
of coatings on metals.Three steps ensure best accuracy...
1. Calibration: typically performed by the manufacturer.
All probes include a Certificate of Calibration.
2. Verification of Accuracy: typically performed by the user on
known reference standards such as the included plastic shims
or optional coated thickness standards.
3. Adjustment: Adjustment, or Cal Adjustment is the act of
aligning the Gage's thickness readings to match that of a
known sample in order to improve the accuracy of the Gage
on a specific surface or in a specific portion of its measurement
range. 1-point or 2-point Cal Adjustments are possible.
Probes are factory calibrated and perform an automatic self-
check each time a measurement is taken. For many applications
no further adjustment is necessary after a Reset (pg. 6).
Just check ZERO on the uncoated substrate, then measure.
However, sometimes readings can be influenced by changes in
substrate, such as shape, composition, and surface roughness.
That is why Cal Adjustments are made possible. The
disappears whenever a Cal Adjustment is made to the Gage.
Where a Cal Adjustment method has not been specified, use
a 1-point method first. If measuring the included shims on your
surface reveals inaccuracies, use the 2-point method. Factory
Cal settings can be restored at any time by performing a Reset
(pg. 6), creating a NEW Cal setting (See Cal Memory, pg. 5),
or by DELETING the adjustments made to the Cal 1 calibration
setting (pg. 5). The
whenever factory Cal settings are in use.
For "FN" gages, calibration adjustments are made independently
to the "F" or "N" modes, and are stored together within a particu-
lar Cal.
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