Lcd Visual Display; Setting; Messages - Fisher F75 SPECIAL EDITION User Manual

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Comprehensive Operating Manual & Guide to Metal Detecting
Discrimination Mode (continued)
4: FOUR DIFFERENT AUDIO TONES This selection is similar to 3, but with a fourth medium-
high tone for targets in the numeric range of 53 to 65. This four-tone system is useful for
searching in areas where there may be very old coins which register in this range.
dP: DELTA PITCH This setting produces a tone whose pitch varies in relation to the visual ID
number -- the higher the ID, the higher the pitch. Good for relic hunting. This setting is
also useful in areas with a high concentration of steel bottle caps. Coins will produce a
fairly constant pitch as you sweep back and forth. Bottle caps produce inconsistent
tones, often with a squawk at the beginning of the sound.
Process Number (Process #)
This menu selection offers the user a choice among several different methods of audio
discrimination to accommodate a variety of search conditions and personal preferences.
These methods differ in the way the signals are processed for analysis.
The Process Number selections are:
dE: DEFAULT PROCESS
This is the best process to use for most conditions, and is thus the default.
JE: JEWELRY PROCESS
Detector will be more sensitive to small and low-conductivity metals like jewelry, but will
run noisier in trashy areas.
bc: BOTTLE CAP MODE
Response is modified so that steel bottle caps will usually produce inconsistent, or non-
repeatable, tones and broken sounds. There may be a slight reduction in the ability to
separate adjacent targets. Use this process in areas with a high concentration of steel
bottle caps. Also refer to the Capabilities & Limitations section for sweep techniques to
aid in the identification of steel bottle caps
PF: for use in plowed fields.
Some users may prefer this process for hunting in irregular ground, especially plowed
fields.
bP: BOOST PROCESS
This process is an enhanced sensitivity version of the dE (default) process. It is
particularly useful when searching for deep targets in a non-trashy area, or on a site
where vegetation makes it necessary to raise the searchcoil several inches above the
surface of the ground. It will also produce excellent results on trashy sites provided that
you slow down your sweep speed; sweep the coil slower than you would when using the
Default process. When the Boost process is selected, the response characteristics of
the Motion All Metal Mode are also modified; these characteristics include less noise and
a slower response speed.
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Comprehensive Operating Manual & Guide to Metal Detecting
LCD Visual Display (continued)
BATTERY CONDITION INDICATOR
Fresh alkaline batteries will illuminate all three bars. When no bars are displayed and the
batteries are about to go dead, the BATT legend will start flashing. The detector should operate
for an additional 30 minutes from the time the BATT legend starts flashing. If using NiMH
rechargeable batteries, the display will remain stuck on the second or third bar for most of the
battery life; when it drops to the first bar, the batteries will go dead within several minutes.
G.B.
This is the ground balance setting, 0-99. It is displayed when in the Manual G.B. menu
setting, or when the trigger is pushed for FASTGRAB computer-assisted ground balancing.

SETTING

This is illuminated when you are in the menu. When the word "SETTING" is indicated, the
number being displayed is a setting, and not, for instance, a Target ID indication.

MESSAGES

The small rectangular box at the bottom-center of the LCD displays advisory messages.
If a metal object or highly magnetic soil is so close to the searchcoil that the signal is
overloading the circuit, the message OVERLOAD - RAISE COIL will appear.
Such overloads will not harm the detector, but the detector will not detect metals properly
under these conditions. Raise the coil until the message disappears; the siren sound will also
stop. Resume normal detection.
The message RAISE COIL only appears when using the bc process, accessed through the
PROCESS # menu selection. This message indicates the presence of a target which may be
too close to the searchcoil to be accurately identified. For better target identification, sweep
the searchcoil farther away from the surface of the ground.
The message PUMP COIL TO GB will appear when you push the trigger forward to ground
balance. See the Ground Balance section of this manual for instructions.
The message CAN'T GB can only appear when the trigger is pushed forward, invoking
FASTGRAB automatic ground balancing. This message appears when the detector is unable
to measure the soil in a manner suitable for ground balancing. This message is usually the
result of the presence of metal. Try another spot to find an area free of metal.
BACK LIGHT
The LCD is back-lighted for use in low light and dark conditions.
The backlight is always illuminated, but the illumination is usually not evident in daylight.
You cannot turn the backlight off. The single high-efficiency light emitting diode providing the
illumination is a low current device, and has a negligible impact on battery life.
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