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A feature of the M-Scan is the ‘Erase’ button. The instrument
is balanced during manufacture to produce a response close
to zero in Earth’s field. In some cases it is useful to offset this
field towards the North or South to compensate for a large
magnetised or magnetisable object such as chain link fencing
or a nearby vehicle that may have a large magnetic presence.
By doing this compensation it can help when locating targets
close to another ferrous object or structure.
If the Erase button is pressed the instrument
will re-zero itself and the offset will remain
even if the sensitivity level is changed.
The Erase button can be pressed more than once
and each time the unit will re-zero itself.
There may be times when the interfering field
is so strong that a zero balance is not possible,
and in such cases, another attempt should be
made after the sensitivity level has been reduced.
When using this feature keep the M-Scan
a constant distance and angle from
the large structure.
To turn off the Erase function press the on/off
button twice to return the M-Scan to its initial setting.
Figure 6 A feature of the M-Scan is the ‘Erase’ button,
which cancels interfering fields from nearby objects
such as chain-link fencing.
Application Note 4. Using near Large Ferrous Objects
Summary of Contents for M-SCAN
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