Level of
DISCR
DEPTH
Depth of discrimination in real field work
for very small
iron objects
for small
iron objects
for medium-sized
iron objects
for large
iron objects
0
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
1
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
2
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
3
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
4
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
5
0% ~= 0 cm
0% ~= 0 cm
0% ~= 0 cm
40% ~= 16 cm
6
0% ~= 0 cm
20% ~= 4 cm
40% ~= 12 cm
50% ~= 20 cm
7
10% ~= 1 cm
40% ~= 8 cm
50% ~= 15 cm
60% ~= 24 cm
8
40% ~= 4 cm
50% ~= 10 cm
60% ~= 18 cm
70% ~= 28 cm
9
50% ~= 5 cm
60% ~= 12 cm
70% ~= 21 cm
80% ~= 32 cm
10
100% ~= 10 cm
100% ~= 20 cm
100% ~= 30 cm
100% ~= 40 cm
Data from the table can be presented in the form of conclusions:
- at levels from "0" to "4", in a practice for a most common sizes of iron objects, the depth of
discrimination is practically equal to 0 cm, ie the metal detector produced the same sound
(single solid signal) for all metals and consequently do not distinguish and reject them;
- at levels from "4" to "6", partial depth of discrimination has partially for medium and large
iron objects, therefore, in practice can be assumed that up to level "6" the metal detector does
not distinguish the metals;
- in level "0" of DISCR DEPTH potentiometer, in combination with level "0" of DISCR LEVEL
potentiometer, the metal detector is in real mode "All metals". This mode is appropriate when the
target is to be detected absolutely all metal objects available in the soil (ferrous and non-ferrous
metals). In this mode, is recommended to carry out precision choice of auto ground zone and/or
manual balancing of the metal detector, with the aim of achieving the maximal balance for a
particular terrain.
- with increase of the level, the set depth of discrimination begins to grow, as with each
successive level the depth of discrimination is greater. This in practice is observed at levels
from "7" to "10". At these levels, on detection of non-ferrous metals (copper, bronze, silver,
gold) is heard a dense and uninterrupted sound, and on detection of ferrous metals (iron) the
sound is interrupted (intermittent) or absent, ie they are completely ignored (rejected);
- medium and large iron objects are rejected satisfactory at levels "7" and "8", and entirely at
levels "9" and "10";
- small iron objects are rejected satisfactory at level "9", and entirely at level "10";
- very small iron objects are rejected satisfactory and entirely only at level "10".
For this, level "10" is highly recommended setting for terrains contaminated with small irons (small
heavily corroded iron nails, iron nails with large head, small pieces of wire, small highly corroded
irons and steel);
- at level "10", the depth of discrimination is 100%, ie it is most and respectively at this level
the metal detector rejects the relevant iron object to the greatest depth. This depth expressed
in centimeters, is different for the different iron objects, as it depends heavily from the
uninterrupted flat surface of the relevant iron object. The maximum depth of discrimination
(depth of discrimination 100%) is: for very small iron objects: ~ 10 cm; for small iron objects:
~ 20 cm; for medium-sized iron objects: ~ 30 cm; and for large iron objects: ~ 40 cm.
It is recommended to work at possible lower level of DISCR DEPTH potentiometer. Working at a
higher than real proper level of DISCR DEPTH potentiometer, in combination with set at a higher
level DISCR LEVEL potentiometer, and set to a lower mode DISCRIMINATOR switch, may lead to
rejection of signals from small or deeply buried non-ferrous metals, especially when they are at great
depth in mineralized terrains, or under mineralized ceramics and/or mineralized stones.
BLISSTOOL LTC64X
- User Guide (version EN201405101504)
Page 28 of 42
