Interfacion QED-PL2, Owner'S Manual

Page: 11 / 35

11
MENU CONTROLS
1: MANUAL GND BAL (MGB)
Setting range 1-200
Factory preset at 100
Description
The detector will respond to the natural mineralization of the soil and
provide the operator with false signals. It is necessary to Ground
Balance the detector to only register the signals generated by metal
targets.
The
Manual Ground Balance procedure is as follows:
•
Turn ON the detector
MGB Prerequisites:
✓ Before trying to MGB, swing the coil over the ground to make
sure there are no metal targets under the coil, and
✓ Wait until the audio settles/recovers before lowering the coil to
the ground.
•
Press the button and select Menu Item # 1 to open the
MGB setting
•
Very slowly RAISE and LOWER the search coil up and down from
the ground surface – approximately 6 inches down to 1 inch
above the ground and repeat
•
Take note of what the audio does as the coil is in the
DOWNWARD motion:
o
If the audio on the downward motion is a LOW tone/pitch,
then increase the MGB by pressing the button.
o
If the audio on the downward motion is a HIGH tone/pitch,
then decrease the MGB by pressing the button.
•
When the tone has faded to a minimum, the detector will be
ground balanced.
Note: Do not hit the search coil with the ground surface as this can produce
unexpected results when trying to ground balance the detector.
Tip:
The or buttons
can either be:
•
Held in if there is a
large difference
between the ground
and the current
ground balance
setting, or
•
incrementally
adjusted to achieve
the MGB.