Sensitivity Adjustment; Surface Elimination; Headphone Jack; Electromagnetic Interference - Teknik GC1035 Manual

4．4

Sensitivity Adjustment

Adjusting Sensitivity in DISC,NOTCH and AUTO-NOTCH MODE：
Press ADJ to enter into sensitivity setting status. The display bar of "SENS" flashes.
Press + to increase the sensitivity level. Press – to decrease it.
Note：Sensitivity is not adjustable in ALL METAL mode

ELECTROMAGNETIC INTERFERENCE

The principle use for the Sensitivity Control is to eliminate electromagnetic interference.
This metal detector is an extremely sensitive device. The search coil creates its own
magnetic field and acts like an antenna. If your detector beeps erratically, probably it
detects another electromagnetic field. Common sources of the electromagnetic
interference are electric power lines, both suspended and buried, motors, and household
appliances like computers and microwave ovens. Some indoor electronic devices, such
as dimmer switches used on household lighting, produce severe EMI and can cause the
detector to beep erratically. Other metal detectors also produce their own
electromagnetic fields. So if you are detecting with a friend, keep two metal detectors at
least 6 meters apart.

SEVERE GROUND CONDITIONS

Another use for the Sensitivity Control is to reduce false detection signals caused by
severe ground conditions. Although this metal detector has specially designed circuit to
reduce the ground mineralization, the ground conditions in field cannot be anticipated.
Highly magnetic soils found in mountainous area can cause the detector to emit tones
when metal objects are not present.
cause false signal. If the detector emits false, non-repeatable, signals, REDUCE THE
SENSITIVITY.

MULTIPLE TARGETS

If you suspect the presence of a deeper target beneath a shallower target, reduce the
sensitivity to eliminate the detection of the deeper target, in order to properly locate and
identify the shallower target.
4．5

Surface Elimination

Press SURF ELIM to enter into or quit Surface Elimination mode.
SURF ELIM only works in DISC/NOTCH mode. SURF ELIM can improve the accuracy of
detection result in soil with mass trash metal. It restrains the signal from trash metal in
soil surface layer, and balances the signal from large target. But detector's sensitivity is
decreased in this mode.
4．6

Headphone Jack

High saline content soils and sands can sometimes
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