DeFelsko PosiTector 200 Guide D'utilisation page 7

Zero
The probe must be periodically zeroed using the Zero menu option
to compensate for both extreme temperature and probe wear
effects. Before using, allow the probe to reach ambient temperature.
Wipe the probe clean of couplant.
If measurements will be made in extreme hot or cold temperatures,
it is recommended to Zero the probe in the working environment.
If measurements will be made on rough substrates, it is
recommended to periodically Zero the probe to compensate for wear.
Set Range
The measuring range of each probe can be changed depending
on the specific application or the expected thickness range of the
coating system.
For most applications, the default range values do not have to
be adjusted. But some conditions, like surface roughness, may
cause the Gage to display very low or non-repeatable readings.
In this case, the low range may be increased to cause the Gage
to only display readings above the Lo value set by the user.
To adjust Set Range values...
1. Select
2. Use the (-)(+) buttons to decrease/increase the displayed value.
IMPORTANT:
The PosiTector 200 interprets the largest "echo" or "echoes"
within the selected range as the coating/coating or
coating/substrate echo. If the coating thickness is outside this
range, incorrect or dashed readings may occur.
Cal Settings Menu
or .
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