8
Adjustment Techniques
If the average of a series of measurements by both instruments
(
PosiTest PC
and dry film thickness instrument) is not within
combined tolerances, the
PosiTest PC
can be adjusted using
one of two methods:
1-Point Adjust
– The first and most common choice.
2-Point Adjust
– Used only if a 1 Pt Adjust does not
sufficiently improve accuracy.
1-Point Adjust
1.
Spray approximately 75 microns (3 mils) of powder onto a
flat, smooth metal sample.
2.
Select
1-Pt Adjust
from the gage menu.
3.
Take at least 3 uncured powder
measurements with the
PosiTest PC
. Press
the button to discard the last reading if
it should not be included in the average of the
measurements.
4.
Select
OK
to confirm and store the average of the
measurements.
5.
Cure the powder. The instrument will power off after 5
minutes of inactivity, but the uncured powder measurements
will be retained.
6.
Measure cured thickness with a magnetic or eddy current
dry-film thickness gage. Record the results.
7.
Power-up the instrument, and select
1-Pt
Adjust
from the gage menu and then
select the option.
8.
Adjust the displayed reading lower or
higher to match the cured thickness value.
Select
OK
to store the adjustment.
9.
Verify accuracy (pg. 7) to ensure the instrument is
measuring within tolerance.
This only appears if 1 pt adjustment
readings have been stored
NOTE:
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