Unwanted Noise; Sweeping The Searchcoil; Using Pinpoint; Reading The Display - Fisher F19 Owner's Manual

OPERATING IN DISCRIMINATION MODE

Unwanted Noise

Read the section on Electromagnetic Interference.
This 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.
In Discrimination Mode, when you sweep the coil over the ground it will usually be quieter
than when holding the detector still.

Sweeping the Searchcoil

As you sweep the searchcoil over the ground, try to keep the coil parallel to the ground.
Avoid lifting the searchcoil at the end of your sweeps.

Using PINPOINT

Press-and-Hold the Pinpoint button to narrow down the location of a buried metal object.
Pinpoint does not require the searchcoil to be in motion.
A motionless searchcoil held over a metal object will induce a hum; volume and
pitch of the hum increase with target strength.
The approximate target depth, in inches, will be indicated in the center of the screen.
The depth scale is calibrated to coin-sized objects.
Relative depth is indicated for larger or smaller objects.
Upon releasing the button, you will return to a motion detection mode.
If you keep the Pinpoint button depressed for a long time, the audio tone may begin to drift.
If you plan to search like this, release and re-press the button periodically to avoid
drift. Drift may result in a loudening sound or a reduced sensitivity with no sound.
See the manual section on Target Pinpointing for how to narrow down a target's location.
This technique is indispensable as long-buried metals can look exactly like the
surrounding soil to the naked eye. If you are not adept at pinpointing, digging up and
retrieving a small metal object can be very frustrating. So learn how to narrow-it-down.

READING THE DISPLAY

TARGET-ID
Each time you pass the searchcoil over a metal object, a 2-digit value will appear in
the center of the display. See the manual section on Target Identification for a better
understanding of these values.
Three segments will simultaneously appear above the arc at the top of the screen.
This represents the same Target Identification, but displayed graphically on the scale.
Target Scale
This display works as in the All Metal Mode.
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.
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 coil
because of interference from iron minerals in the ground.
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