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Rejected segments appear as black, accepted
segments disappear altogether (allowing signals
from metal objects). The combinations of accepted
and rejected segments are referred to as patterns.
Desired and undesired targets may appear
anywhere along the discrimination scale, e.g.
Desired ferrous target - Canadian coin
Undesired ferrous target - iron nail
Desired non-ferrous target - gold coin
Undesired non-ferrous target - pull tab
Discrimination segments can be accepted
or rejected, in turn accepting or rejecting
certain targets.
In addition to the target ID, targets are also
represented as a particular segment on a
linear scale at the bottom of the display.
Each discrimination segment represents
a level of conductivity and ferrous content.
Non ferrous targets are those that have no
iron content, such as gold, silver, copper
and bronze. Non-ferrous targets are often
higher in conductivity and are represented
by the right hand side segments.
Ferrous targets are those that contain iron,
for example nails and scrap metal. They
generally have a low conductivity and are
represented by the left hand side segments.