AKA SOREX PRO Operating Manual page 19

the searchcoil (a clod or an air layer) and during scanning these pieces go one after
another, sometimes it leads to phantom responses of the device identification channel.
At the same time, ground phase digit in automatic balancing operation may differ by 3
degrees on the same place.
If you face such problem, perform manual ground balancing in the following way:
Find a clear area, 60 cm wide. Go to manual setup mode and making short horizontal
search passes (but quicker) with a 50 cm amplitude, 3-5 cm above the ground, you will
see a straight ground line on the screen (if it jerks, there is a metal).
Upon that, if the balance is incorrect, you will hear a buzz from the ground and
onscreen ground line won't be horizontal.
Use buttons
device is balanced accurately.
To increase the identification depth of large silver and copper coins (samovars,
bowls and other large objects made of high conductivity metals) slightly, after the
automatic balancing, it is possible, in the manual ground setting mode, to adjust the digit
of the balance phase by 1-2 degrees to the minus values.
Great adjustment (or drift) of the balance to the minus will lead to false
responses with nonferrous signal, when bumping the coil over the ground and plants.
Drift or correction of the ground balance to the plus would lead to low sensitivity to large
copper coins (5 kopeks of the Catherine II), such objects may even become invisible and
give "iron" response.
If, by any reason, there is no clear area found, the balancing may be performed
on a slice of excavated soil (1-1.5 kg), with all metal objects removed from it and having it
in a plastic bag for the sake of convenience.
After that fix the device and have its coil at the distance of 40-50 cm from the ground
(put it on a bush, rest it on a tree with a coil on top), turn ground balancing pressing
, count 1,2,3, and move the ground to the coil smoothly but not slowly from the
30-40 cm distance from the external or operating side.
(Similar to automatic balancing in the usual mode, but this time the soil has to be moved,
not the coil)
It is not recommended to put the device on the ground for such balancing.
Warning! If the ground signal is weak (quartz sand) to the extent that the balancing
program cannot run, it is possible to balance the device using a ferrite piece or a red
brick fragment automatically, putting them on the ground. Actually, an "air test"
balance is suitable on such ground and even with balance adjustment by couple
degrees to "minus" in order to increase sensitivity to large targets, if they are expected.
Sharp temperature changes on the searchcoil may impact balancing accuracy,
the balance may shift and become incorrect with such changes.
That is why, if you take the device from a heated car and start working in a low
temperature conditions (early spring, late fall), rebalance one or two times while the coil
adapts to the ambient temperature.
The t icon on the right corner of the screen will tell you that since the last balancing the
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Selective Metal Detector SOREX PRO. Operating manual.
and to make it horizontal, the buzz will stop, your
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