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When selected, the icon will appear and all calibration settings
are “locked” to prevent further user adjustments. Uncheck to make
further adjustments.
Cal Lock
Select N Lock (Non-Ferrous Lock) when operating regularly on
non-ferrous substrates. The icon will appear and the probe will
only use the eddy current principle to shorten measurement time
and extend battery life.
N Lock is useful when measuring coatings on plated steel.
Normally the probe measures both the coating + plating over the
steel using the magnetic principle. N Lock makes the Gage
measure the coating over the plating only.
Select N Lock to measure over slightly magnetic substrates; i.e.
clear-coat on gold over nickel-plated brass. Although the probe's
magnet is used for the magnetic principle, it is also used in N Lock
to magnetically saturate a slightly magnetic substrate and allow
the eddy current principle to operate unhindered.
With N Lock engaged it is possible to obtain a reading
when measuring non-conductive coatings on steel. This is not
recommended.
N Lock
(FN ferrous/non-ferrous combination probes only)
CAUTION:
4. Lift the probe from the surface and adjust the displayed reading
down (-) or up (+) to the known thickness value of the thin item. Press
to accept this value.
5. Repeat steps 2 - 4 for the thicker item.
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