Manual

ManualsBrandsFisher ManualsFitness & SportsF75 Multi-Purpose Metal Detector

Comprehensive Operating Manual & Guide to Metal Detecting

F75

The F75 is a multipurpose metal detector. Its most popular uses are coinshooting

and relic hunting, and it is also well-suited to gold prospecting.

How Metal Detectors Work

Most hobby metal detectors use VLF Induction Balance

technology. Here's how they work.

The searchcoil (also called search head or loop) contains two

electrical induction coils which are like antennas. One coil

transmits a rapidly alternating magnetic field,

illuminating the

region surrounding the searchcoil. If metal is present, its

electrical conductivity distorts the magnetic field. If iron metal is

present, its magnetism also distorts the magnetic field, but in a

different way, allowing the metal detector to distinguish between

ferrous and nonferrous metals.

The other coil is a receiving antenna which detects changes in

the magnetic field caused by the presence of metal. Electronic

circuits amplify this weak signal, analyze it to determine the

changes which occur as the searchcoil sweeps over the target,

and then convey the information to the user in the form of a

visual display or audio tones. Most modern metal detectors

perform many of these tasks in software running on an internal

microcomputer.

The iron minerals which are present in most soils also distort the

magnetic field, obscuring the weak signals of small or deep

objects. This can cause the object to go undetected, or to be

misidentified when it is detected. Much of the technology that

goes into modern metal detectors is devoted to the task of

eliminating the unwanted signals from iron minerals in the soil,

while not losing the signals from metal objects.

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PRODUCT FEATURES

• Light weight and well-balanced: best ergonomically engineered detector in the

industry.

• Intuitive menu-driven user interface

• Large LCD screen

• Visual indicators of important values such as:

Target Identification

Target Confidence

Target Depth (both running-depth and pinpoint-depth)

Ground Mineralization

• Multiple Search Modes:

Discrimination

Static All-Metal

Motion All-Metal

• Trigger-actuated FASTGRAB™ ground balancing with manual override

• Waterproof 11-inch open-frame BiAxial™ searchcoil

Housing constructed of a carbon fiber-polycarbonate blend

• Trigger-actuated target pinpointing with variable audio pitch

• Fully Adjustable Arm Rest

• Display backlight for night and low-light conditions

• Notch and discrimination controls

• Covers provided for both the control housing and battery box.

• Made in the USA

If you have any questions, or need assistance with your metal detector,

Call 1-915-225-0333, and ask for Fisher Hobby Technical Service