Fisher F44 Owner's Manual page 22

GROUND CANCELATION
When using a metal detector the
Ground Balance Error Indicator
Ground Phase conditions can change
from location to location and even within
smaller areas only yards apart.
Performance can suffer if the detector is
not ground balanced properly so it is
important to know when the conditions
have changed.
The Ground Balance Error arrows will
show the user when to rebalance the
detector; the downward pointing arrow
icon will illuminate and blink when the
ground phase condition is lower than the
ground balance setting, and the upward
pointing arrow icon will illuminate and blink when the ground phase condition is
higher than the ground balance setting. When these conditions occur you
should rebalance the detector.
Refer to the GROUND section, (page 14), on how to manually adjust the
detector's internal Ground setting.
selections, perform the coil pumping described above, and listen to the audio
sounds.
If the Ground setting is incorrect, there will be a difference in the sound as the
searchcoil is either moving toward or away from the ground. It sounds like you
are either pulling the sound out of the ground, or pushing the sound into the
ground.
• If the sound gets louder as you raise the searchcoil, increase
• If the sound gets louder as you lower the searchcoil, reduce
Repeat this process of adjusting until there is no sound as you lower or raise the coil.
NOTE: Experienced users often prefer to adjust the Ground setting to get a
weak but audible response when lowering the searchcoil. This is called
"adjusting for positive response".
Fe O BAR GRAPH
The Fe 3 4 O 4-segment bar graph indicates the amount of ground mineralization,
independent of type, expressed as an equivalent volume concentration of
3 4
magnetite (Fe O
the most accurate readings if you "pump" the searchcoil up and down several
3
times over the ground. The presence of metal or "hot rocks" will cause the readings
22
). It updates every second. It is sensitive to motion and will give
4
Continued)
UP ARROW:
Blinking means
ground phase
value has
increased above
ground balance
set point.
After selecting Ground in the Menu
DOWN ARROW:
Blinking means
ground phase
value has
dropped below
ground balance
set point.
the Ground setting.
the Ground setting.