In light and clean terrains is advisable to work at level "NORM". In polluted terrains, terrains
with hot rocks and mineralized terrains is desirable to operate at levels between:
- For LTC48X v2: from „NORM“ to „4“.
- For LTC48X v1: from „NORM“ to „6“.
Higher levels should be set only in extreme necessity.
Set higher of real necessary level of DISCR WIDTH potentiometer (the width discrimination), in
combination with a set of higher level of DISCR LEVEL potentiometer (degree of discrimination) may
result in the rejection of weak color signals of small or deep buried ferrous metals.
In LTC48X v2 because has increasing range of discrimination by DISCR LEVEL potentiometer,
DISCR WIDTH potentiometer usually not used (set to level NORM).
9.8. DISCR DEPTH potentiometer
The DISCR DEPTH potentiometer serves for adjusting the depth of
discrimination (the maximum depth to which the metal detector distinguish
the metals).
In position "0" depth of discrimination is practically equal to 0 cm, ie the
metal detector issue the same sound (single solid signal) for all metals
and consequently do not distinguish and reject them.
With increasing the level, depth of discrimination begins to grow, and increasing from the
minimum 0 cm to a peak of about 30-40 cm, while each successive level the depth of
discrimination is greater, ie at a level "10", the depth of discrimination is most appropriate and
at this level the metal detector distinguish the metal at greater depth. As a result, on detection
of non-ferrous metals (copper, bronze, silver, gold) can hear a deep-toned, continuous non-
pausing sound, but for ferrous metals (iron) the sound is pausing (recurring). The specific
behavior depends on the current levels of DISCR LEVEL and DISCR WIDTH potentiometers.
Should not be working with more than the required depth of discrimination set by DISCR DEPTH
potentiometer. Otherwise, will be losing some of the greatest possible depth of detection!
For practical use, in light and clean terrains, when searching for non-ferrous metals, are
recommended operating at levels from "5" to "7". In polluted terrains, terrains with hot rocks
and mineralized terrains are recommended work at levels between "9" and "10". These levels
may be used in cases where targets the maximum depth of discrimination.
In the terrains strewn with pottery, it is desirable to work with smaller levels of DISCR DEPTH
potentiometer to more effective detection of non-ferrous metal located to the individual ceramics
pieces.
In this case, the metal detector is desirable to be advance balanced and tuned to the specific
ceramics, as described in 9.3 and 9.4 ways (manual and auto ground balance).
In the discrimination mode, intentional interception through the same signal at different levels
of DISCR DEPTH potentiometer can be made estimations about the type of the detected metal
(ferrous or non-ferrous), the depth of the detected metal (mainly for ferrous metals), the
quality of detected metal (low or high) and size of the detected metal (small or large), or at
least to gain additional data for the detected signal in order to judge it worth to be excavated
(uncovered):
- If the detected signal is from high quality and/or large non-ferrous metal and/or shallow
buried non-ferrous metal, then with increasing the levels of DISCR DEPTH potentiometer from
level "0" to about level "6", the sound produced by the device will not change or will be
changed slightly;
- If the detected signal is from low quality and/or small non-ferrous metal and/or deeply buried
ferrous metal, then with increasing the levels of DISCR DEPTH potentiometer from level "0" to
about level "7", the sound produced by the device will significantly change as will be blunt and/
or will occur the first signs of rejection;
BLISSTOOL LTC48X -
User Guide (version EN201008241400)
Page 15 of 28
