Operating In All-Metal Mode; Ground Grab (Gg); Setting The Controls; Unwanted Noise - Fisher Labs Gold Bug Pro Owner's Manual

OPERATING IN ALL-METAL MODE

The All-Metal mode is more sensitive than the Discrimination mode, and is used to
find all types of metal objects in the ground. The searchcoil must be in motion for
objects to be detected.

Ground Grab (GG)

Naturally occurring minerals in soil look like metal to a metal detector, so you want to
cancel out this mineral signal coming from the ground, and only detect the signal from
metal objects in the ground.
So before using your detector, set it in All-Metal mode and perform the automatic
ground balancing procedure. Press-and-hold the GG button while pumping the
searchcoil up and down over the ground. Release the button when the sound evens
out. The GND BAL number on the bottom right of the screen is the detector's internal
setting which cancels out the minerals in the ground. Different soils in different areas
will require different GND BAL settings, so balance to ground before you search. See
the section on Ground Balancing for a detailed description of this procedure.

Setting the Controls

As you adjust any of the controls, notice that the values on the bottom-right of the
display indicate the settings of the value you are changing.
If you are new to metal detecting, start with the GAIN and THRESHOLD controls at a
low enough setting that you do not hear too many unwanted sounds, like warble or a
loud hum. Set the GAIN at the 12:00 position, or less. Then set the THRESHOLD to a
position where you hear a very slight background hum, or if you prefer, dial the control
just left of that position to a setting where the detector is silent.

Unwanted Noise

Read the section on Electrical Interference.
The Gold Bug Pro is a highly sensitive device.
It is intended for use outdoors. Indoor operation will subject it to electrical interference
from a wide variety of devices in the home or office.

Sweeping the Searchcoil

As you sweep the searchcoil over the ground, try to keep the searchcoil parallel to the
ground.
Avoid lifting the searchcoil at the end of your sweeps.
Operating in All-Metal Mode continued on next page
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