General Information - Fisher Labs F 75 User Manual

F75
Comprehensive Operating Manual & Guide to Metal Detecting
Introduction to the Fisher F 75
HIGH PERFORMANCE
detector. It has the high sensitivity and ground balancing control needed for professional
gold prospecting, the discrimination responsiveness needed for serious relic hunting
under difficult conditions, and visual target ID considered essential in searching for coins.
The F75 operates at 13 kHz for good sensitivity to gold nuggets and jewelry as well as to
coins. The F75 comes with an 11-inch elliptical Bi-Axial searchcoil for maximum
detection depth in mineralized soils.
USER COMFORT The F75 is among the lightest and best balanced of all high-performance
metal detectors, so you can hold and swing it almost effortlessly. The arm rest position is
adjustable to fit your arm. The grip is durable high-friction foam elastomer, comfortable in
any kind of weather. The controls are conveniently located and easy to learn how to use.
Locking collars on the tubes eliminate rattling.
EASY-TO-USE & INFORMATIVE INTERFACE
LCD display. The LCD display indicates the electrical signature (target I.D.) of the
detected metal object. The display provides continuous information on battery condition
and on ground mineralization, which affects detection depth. Help messages are
automatically displayed on the bottom of the display when necessary.
LOW OPERATING COST
typically last for more than 40 hours of use before needing replacement.
DESIGNED BY MANY OF THE INDUSTRY'S MOST TALENTED ENGINEERS
The lead engineers on the F75 design team were John Gardiner and David Johnson.
David Johnson's previous Fisher design credits include the CZ-platform, the Gold Bug-
series, most of the 1200-series, Impulse Underwater Detector, CZ-20 Underwater
Detector, FX3 magnetometer, the Gemini 2-box locator, the XLT-16 Acoustical Leak
Detector, and the XLG-80 Ultrasonic Leak Detector. John and David were supported by
fellow electrical engineers Jorge Corral, and Mark Krieger. The mechanical design was a
collaboration among David Johnson, Brad Fulghum, John Griffin, and Tom Walsh.
MECHANICAL ENGINEERING
While the F75 is robustly engineered for outdoor use, it is not indestructible and it is not
waterproof.
RESET function
The F75's microprocessor saves all settings which you input, even after the power is
turned off.
If you wish to reset the settings to the factory preset, follow this process:
1. Turn detector off.
2. Press-and-hold the red MENU button and
push-forward-and-hold the TOGGLE SWITCH.
3. Turn the detector on, while you are still holding the controls.
4. Release the MENU button and TOGGLE SWITCH.
5. See the F symbol. When the F disappears, the detector is reset.
10
The F75 is a multi-purpose high-performance computerized metal
The F75 is powered by four AA alkaline batteries, which will
The entire menu is always visible on the