interference and there is no further need for manual balance adjusting by the GROUND
COARSE and GROUND FINELY potentiometers from the user, and it is not important in what
levels are set these potentiometers.
Automatic ground balance mode is appropriate for terrains with a heterogeneous soil.
In order to optimize and achieve the best possible balance, the automatic ground balance
mode is divided into three ground zones with a small area of correlation. They are selected by
an AUTO ZONES switch as described below.
9.4. AUTO ZONES switch
The AUTO ZONES switch serves to set one of the three available automatic
ground zones at work in automatic ground balance working mode.
The individual zones are numbered as zones "1", "2" and "3", which
corresponds to the following soil type:
- Zone "1": soils with black and/or negative mineralization;
- Zone "2": not mineralized or weakly mineralized soils;
- Zone "3": soils with a color and/or positive mineralization.
The recommended position of switch AUTO ZONES is the "3" (recommended
position for beginners).
Most often works in Zone "1".
In most cases:
- Zone "1" is suitable for: terrains strewn with ceramic containing impurities of ferrous metals;
terrains dotted with stone plates with negative mineralization; soil, sand, stones and rocks with black
and/or negative mineralization;
- Zone "2" is suitable for: not mineralized or weakly mineralized soils; loose soils with low density;
"light" soils; clean terrains;
- Zone "3" is suitable for: soil, sand, stones and rocks with color and/or positive mineralization;
highly mineralized terrains and terrains with a high content of ore, terrains with a high content of hot
rocks, terrains with high content of rusty black metals such as, but not limited to: small heavily
corroded irons and steel, small pieces of wire, heavily corroded pieces of sheet metal, small iron
nails and steel nails, tack, slag and other ancient and contemporary pollutants.
To determine which of the three zones eliminates the best influence of soil is
necessary:
- to be chosen the auto ground balance mode (GROUND MODE switch turned to "AUTO"
position);
- the DISCR LEVEL potentiometer to be set at a level "0";
- the THRESHOLD potentiometer to be set at a level, just before the level where the metal
detector starts slightly zoom sound made (issued torn sound, buzzing, whiz) or one or two
levels before the level of zoom (recommended for beginners searchers).
Then is done vertical (up-down) movement of the search coil ranging from 2-3 cm to 20-25 cm
above the terrain and simultaneously AUTO ZONES switch, is switches alternately between the
three available positions (zones).
Most appropriate for use is the zone, where in the described manner of movement of the search coil,
the metal detector does not beeps or issue possible weak sound, or at least the pre-set audio
threshold level did not change significantly.
In mineralized terrains, if has a strong responsive signal from the terrain and selection of most
appropriate auto ground zone is difficult or the user has small practical experience, is
recommended the THRESHOLD potentiometer to return with one or two levels back at the level
where the metal detector starts to slightly zoom, then proceeding to the described above
method of choice of zone. In addition, in order to reduce the response signal from the ground,
can be set in advance desired level of discrimination (DISCR LEVEL potentiometer from level
BLISSTOOL LTC64X
- User Guide (version EN201405101504)
Page 19 of 42
