Makro Detektor JEOTECH, User Manual

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8. If the ground setting cannot be done as a result of the actions
explained above, the "SENSITIVITY" level of the device should be
reduced and the actions explained above should be repeated.
NOTE:
If you are having difficulties in making ground setting on tough
ground (with intense mineral content) and if the soil setting cannot be
provided accurately; it is also possible to perform a search with a single
light on the “Metal and Mineral” or “Cavity and Mineral” side.
NOTE: As the sensitivity levels are reduced, there is a decline in
sensitivity in detecting metals.
NOTE: The search must be conducted in the part, for which the
sensitivity of the ground setting is adjusted.
NOTE: While using the device, when you encounter a surface that
has a different structure than the one you made the ground setting
for, the device starts to keep generating Cavity and metal signals.
When you start to receive signals from the device all the time, the
ground setting of the device should be made again.