Selective Metal Detector SOREX PRO. Operating manual.
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objects.
If such target gives a strong response (rating 10 and higher), the searchcoil edge
scanning technique may be applied. With this scanning technique the aforementioned
targets would give low tone of sound indication, and the display would show specific shift
of the hodographic picture to the left (to the iron sector).
These targets may also be scanned by a searchcoil located at the angle of 45° to
the ground surface. It may not lead to the low-tone sound indication, but, at the same
time, the hodographic picture will be more loop-like with a left-shift tendency (to the iron
sector).
As a rule, such output of both types of indication means that the object is made
of iron.
Search specifics in trashy areas
The search in these areas is the most complicated due to obvious reasons in
terms of the application of a metal detector. It is impossible to give well-defined and
concise “trashy” technique due to the variety and multiplicity of such models.
However, some general guidelines listed below may significantly increase performance in
such areas.
Of course, the main M/T algorithm should be used
1.
Select correct general sensitivity of the device (adequate to the area trash level).
The higher the trash level is, the lower the general boost and identification
channel sensitivity should be – ST. Use the “Economy” mode. Remember, high
sensitivity does not always mean high search performance.
2.
Try to move a coin in close proximity to the search coil. You’ll see that there is
one target, but the unit gives three short tones. This comes from the fact that
the actual interaction of the DD sensor with a target in the close zone is
complicated. What would happen, had there been several objects? It’s obvious
that multiple targets located in the close zone are likely to tangle
comprehension of the sound and visual information. This fact leads to the
important practical conclusion. Do not search in trashy areas with a minimum
gap between the search coil and the ground, especially those with the on-
surface trash. Choose adequate scanning gaps. In this case they may amount
more than 25% of the diameter of the search coil used.
3.
Use short sweep technique (5-15 cm) to search for, identify and locate useful
targets.
4.
The right scanning direction for a group of targets may minimize influence of
neighboring objects.
Based on the above stated, the most important factor of the «trashy» area search
performance shall be your field experience and practical skills.
