Reading The Display; Target Scale - Fisher F19 Owner's Manual

OPERATING IN ALL METAL MODE

Reading the Display

Most gold prospecting and relic hunting is done by ear. Listen for the louder sounds,
riding on top of the constant background hum.
As you sweep the searchcoil, notice the Fe
display.
This indicates the amount of ground mineralization.
Most black sand is made of magnetite.
Gold nuggets are often found in concentrated black sand deposits.
For the best depth detection in highly mineralized soils, use the All Metal Mode.
For the most accurate Fe
While sweeping the searchcoil, also notice the GND PHASE value in the middle of the
screen.
GND PHASE is the ground phase; this indicates the type of minerals in the soil.
Within an area, the ground phase may change.
After ground balancing, periodically compare GND PHASE to GND BAL. If these two
numbers differ by a great deal, you may want to ground balance the detector again.
When not adjusting the knobs, the GND BAL setting will always appear on the
bottom-right of the display.
GND BAL is the detector's internal ground balance setting. The detector's default
ground balance setting is 82.9, which is the best starting point for achieving the
correct setting.
After you perform the Ground Grab
to match your soil.
You can change the current GND BAL setting by pressing the
See section on Ground Balancing for a more detailed explanation.
Experienced users often prefer to adjust the ground balance to get a weak
audible response when lowering the searchcoil to the ground. This is called
adjusting for positive response and is achieved by increasing the GND BAL
number with the

Target Scale

The arc across the top classifies metal objects.
Each time a target is detected, three segments will illuminate above the arc.
The segments will remain illuminated for three seconds.
This indication shows the approximate classification of the buried metal object.
See the section on Target Display for a more detailed explanation.
Iron is on the left. U.S. dimes and quarters are to the far right.
When relic hunting, any Target-ID greater than 40 is a potential non-ferrous relic.
In an air test, gold indicates right of center -- the larger the gold piece, the
farther to the right.
In the ground, the ID of gold may jump around with each pass of the searchcoil.
If searching in All Metal Mode, you may want to switch back into Discrimination Mode,
after finding a target. Review the 2-digit Target-ID provided in the Discrimination Mode
for a more precise target identification.
16
O
3
O reading, pump the searchcoil over the ground.
3 4
® procedure, the GND BAL number will change
key.
(iron oxide) scale to the left of the
4
or
buttons.