Selective Metal Detector SOREX PRO. Operating manual.
AKA LLC +7(495)623-4026 621-0481 http://aka.2000.ru [email protected]
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appropriate +82+84, then your device ground balance was set up by +10+12 degrees
more than required for the "air test".
Ferrite piece balancing is required before the "air test" of the device. Put the
device on the non-metal surface, turn on automatic ground balancing, count to three, and
set a piece of ferrite to the centre of the searchcoil surface from the distance of 25-30 cm,
finishing the balancing. Puzzled? Let's make it easier: Take a CD and pass it flatwise in
front of the searchcoil.
If the CD gives vertical hodograph and VDI within -1 0 +1, then the device is ready
for the "air" tests. If VDI of the CD differs from this values then in the manual balancing
mode (press twice
) correct the phase of the ground balancing by the difference
level and to the required direction. Did the CD get VDI -1 0 +1?
Congratulations, your
device is ready for the "air battle".
Balancing Procedure.
We would like to bring your attention to the
automatic balancing
procedure developed by experienced
users.
1.
Find a metal-free area. You can find it by the threshold tone response in RT-ST
mode. On the unbalanced device there is a response to the pure ground, but the
sound would be quiet and "diffused", without strict localization, while the sound
would be sharp and with strict increase above the metal object. Select an area
with no localized sharp threshold tone increase swinging the searchcoil 5-10 cm
to the left and to the right above the ground. If there is no localized sharp
threshold tone increase, it is the area suitable for balancing.
2.
Having found the metal-free area, raise the coil 30-40 cm above the ground,
press
, wait for 3 seconds, and move the coil to the ground smoothly but
not slowly.
Warning! Do not move the coil to the ground closer than 10% of the searchcoil diameter
(for the searchcoilØ26 cm – 2-3 cm). It is related to the change in the pattern of the
searchcoil physical interaction with the ground in the so-called "Close Zone" and it may
impact balancing accuracy resulting in false responses in clear areas with high values of
sensitivity during search.
Short tone (thrum) notifies of the finished balancing. If there is no tone or it
does not sound during lowering, but sounds when moving up, repeat the procedure with
the same formula: 30-40 cm above the ground, 3 seconds, lower the coil to the ground.
Follow the ground vector on the screen in the process. It should shape as a strait, slightly
trembling line, on the horizontal axis of the scale. If it makes sharp angles or tear around
the screen, it means that you are trying to balance on the metal object in the ground.
In this case the device may balance but it would be incorrect for the operation, and you
will notice it by numerous phantom signals from the ground. If it happened, just
rebalance the device in the clear area. If you had balanced mistakenly in the area where