Kellyco SOVEREIGN GT User Manual - page 14
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7.
8.
Ground Balance switch ( Track/Fix/Pinpoint )
When operating in Disc mode, the Sovereign GT uses digital filtering to
compensate for ground effects and the Track / Fix / Pinpoint function is disabled.
When operating in All Metals, Minelab’s world-renowned Automatic ground
balance is operating to overcome the effects of variable, mineralized soils. This automatic ground
balance means that the Sovereign GT can be used for gold prospecting or relic hunting in
mineralised soils, as well as coin & treasure hunting in parks, fields or the beach.
Track position, continuously analyses the ground and resets the ground balance to compensate
for changes in the mineral content. This position is ideal for areas where the ground mineralization
is changing rapidly.
Fixed position, holds the ground balance at the last setting found while in Tracking and is suited
to areas where the ground mineralisation is more constant. Fixed position will often give slightly
more depth than Track.
Tip: If the Track Mode is unsuccessful at ground balancing in heavily mineralized ground, the
operator should reduce the sensitivity setting and slow down the sweep speed.
Note: In most ground the Sovereign GT will ground balance to a slightly positive level (audio level
rises when the coil is lowered to the ground). This is to ensure maximum depth, and will help to
reduce signals from large hotrocks close to the surface.
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p21
7.
8.1.
To ground balance in mineralized soils
When in the All Metal mode, place the switch into Track and raise and lower the coil between
2 – 15cm above the ground. As the detector compensates for the ground minerals that are
present, the threshold will begin to stabilize, producing the same steady tone as you raise and
lower the coil. Depending on the mineralisation of the soil, this may take a number of pumps of
the coil. It is important that during ground balancing, your coil is positioned parallel to the ground
and that there is no metal in the ground or close to the coil. If you cannot achieve a ground
balance, try again a few feet away in case there is a metal target under your first location or reduce
the sensitivity. Once you have achieved ground balance, switch into Fixed and start
detecting. If the area you are searching is variable mineralisation, you will need to periodically
switch back to Track to reground balance. In areas of highly variable ground, you can stay in Track
mode to search.
Note Be aware that if searching in Track, it is possible, with repeated sweeps across a target, to
track out a weak signal, therefore, always switch to Pinpoint or Fixed to recover the target.
7.
8.2.
To ground balance in non-mineralized soils
If you wish to search in the All Metal mode on a saltwater beach, a better method to ground
balance is to start with the sensitivity in Auto and select the Track position. Begin detecting as per
normal and after you have covered about 10m of ground, switch into the Fixed position. If the
detector remains stable, you can switch out of Auto sensitivity and select a manual setting. This
method will ensure maximum stability and depth on most beaches. If the All Metal mode is too
erratic, then switch to Disc, with Iron Mask / On and the Disc & Notch both on minimum.
7.
8.3.
P/Point (pinpoint)
is a specialized position for pinpointing the location of a
target once found. Pinpoint gives a short signal as the coil passes over the target, which can assist
in knowing exactly where to dig your hole.
As you pass repeatedly across the target, you will notice that the target signal becomes shorter
and sometimes weaker with repeated passes. This will help you locate the exact position of the
target under the coil. If you need to repeat the process, switch out of Pinpoint into Tracking and
then back to Pinpoint again.
Note: You should not search in Pinpoint as the ground balance is disabled and the detector can
become erratic.
TIP: If you are searching in Disc. and want to locate the position of the target, you can switch into
All Metal and use the Pinpoint mode. When operating in Disc. the Pinpoint is disabled until you
switch into All Metal.