Retuning; Detection Field; Large Objects; Small Objects - Teknik GC1035 Manual

conditions can be different. Varying elevations, proximity to water, and concentrations of
rock, sand or clay can all affect ground condition and sometimes require recalibration
with the ground balance knob.
5．5 PINPOINTING (non-motion mode)
Coil sweep technique is not important in this mode. Rather, user's retuning is critical.
The detector does not automatically adjust t as ground and environmental conditions
changing. The operator is required to make the adjustment by himself.

RETUNING

Keep the coil still, just above the ground surface. Make sure that the spot on the ground
you chose for tuning does not contain metal; pass over the area with the coil again to
insure that the detector does not emit a tone and LCD does not display any signal.

Detection Field

The detection field depends on the size of the target.

Large Objects

After a target is detected, LCD displays sensitivity level and a medium tone beeps. If you
lift the coil to a distance around 2cm above the ground, the signal displayed on the LCD is
almost same and the tone does not fade, you may have detected a large or irregularly
shaped object. Further lift the coil off, increments on LCD decreases obviously and the
tone level reduces rapidly. Outline the object with slow coil movements at the same
height.

Small Objects

After detecting a target, LCD displays a low sensitivity level and the speaker emits a faint
sound. While maintaining the coil at this height above the ground, move the coil from
side-to-side. Note the spot where the tone is loudest, and the sensitivity level is largest
(usually increments on LCD changes more sensitive than the sound changes). Then
move the coil toward the ground to zero-in on the target's location. A coin-size object will
be detected when the object enters the range of the inner coil.
15