EN
54
balance the detector.
1. Use ALL METAL mode to find an area that
is free from metal objects, where the
detector can be tested. Any metal objects
in the area will interfere with the process.
2. Lift the search coil to waist height.
3. Set the first control for ground balancing
(GND BAL) in P mode. Turn the dial GND
BAL anticlockwise a little from P.
FIG. 13
4. Press GND TRAC.
5. Lower the search coil to 1–1.5 cm over
the ground. There must not be any metal
objects in the ground.
– If the machine emits an audio signal
when the search coil is 1–1.5 cm over
the ground repeat steps 3 and 4.
– If the machine does not emit an
audio signal when the search coil is
1–1.5 cm over the ground then the
ground balancing is complete and no
further measures are needed.
The dial GND BAL must be turned in small steps
until the first setting (in clockwise direction)
where the machine does not emit an audio
signal is identified. For best results, turn the
dial clockwise a little from the first setting
where the machine does not emit an audio
signal. If the dial is turned clockwise too far the
sensitivity of the machine will be reduced.
Check the ground balancing regularly
according to the instructions above when
searching in different areas. The ground
conditions can vary considerably within the
same geographic area. Different heights above
sea level, the vicinity of water and the presence
of stones, sand or clay necessitate redoing the
ground balancing.
PRECISE LOCALISATION
(STATIONARY MODE)
In this mode it is not important how the search
repeated when the coil is moved over the area
a few times it is probably only a case of scrap
metal. The repeatability of the signal and
thereby the character of the buried object can
be verified by moving the search coil crosswise
over the target area at different angles. To do
this, go round the target area and move the
search coil backwards and forwards over the
target area ten or more times in one turn.
If an object that has generated an audio
signal with a high tone level disappears when
detecting from another angle it is most likely
that the detected object is oxidised iron rather
than silver or copper. If the tone level changes
depending on the angle then the target
area can contain several objects. It can be an
advantage for new users to initially dig up all the
objects that are found. With practice the user
becomes better at reading the character of the
buried objects from the indications given by the
detector. False signals can be given during the
search. False signals mean that the machine
emits an audio signal even though there are no
metal objects in the target area. False signals
can be caused by electromagnetic interference,
oxide or ground with a high mineral content.
If the machine emits an audio signal that is not
repeated when the search coil is moved several
times over the same point there will probably
not be a metal object in the target area. When
searching in places with large amounts of scrap
metal it is best to search in small areas with
slow, short swings.
In some areas there can be a surprisingly large
amount of scrap metal. These are areas where
there have been lots of people, and it is often
here that the probability of finding precious
objects increases.
Ground balancing
Before using ALL METAL mode it is necessary
to carry out ground balancing, which means
that the machine is adjusted to compensate for
the effect of minerals and salts in the ground.
Follow the instructions below to ground
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