F75-MANUAL.qx6 8/15/07 9:42 AM Page 1 F75 Comprehensive Operating Manual & Guide to Metal Detecting 5-Year Limited Warranty The F75 metal detector is warranted against defects in materials and workmanship under normal use for five years from the date of purchase to the original owner. Damage due to neglect, accidental damage or misuse of this product is not covered under this warranty. Decisions regarding abuse or misuse of the detector are made solely at the discretion of the manufacturer.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 2 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting How Metal Detectors Work T he F75 is a multipurpose metal detector. Its most popular uses are coinshooting and relic hunting, and it is also well-suited to gold prospecting. Most hobby metal detectors use VLF Induction Balance technology. Here's how they work.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 3 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Detecting Activities (continued) Shallow Water Hunting (continued) Both fresh and salt water beaches are popular places for metal detecting. Vacationers lose money and jewelry playing in the sand and in the water. It is usually easy to dig in a beach environment, and metal detecting is permitted on most beaches.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 4 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Specifications Detecting Activities (continued) Mechanical: S-rod with electronics housing mounted on handgrip, 3-piece breakdown, batteries under elbow, 2-way armrest adjustment — forward/backward & around forearm. Searchcoil: 11” (28 cm) open-frame elliptical double-D, waterproof. Batteries: 4 AA, alkaline (included). Weight: 3.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 5 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Detecting Activities (continued) Gold Prospecting (continued) minerals, serious gold prospecting requires a detector with high sensitivity and true ground balanced motion all metal operation. Run the machine with the sensitivity high enough to hear some noise from ground minerals, and learn the language of the sounds you hear.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 6 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Assembly Detecting Activities (continued) Battery Compartment Headphone Jack 1. Remove all components from box. Release Clip 2. Attach searchcoil to lower rod by lining up the holes. Push coil knob through hole and tighten knob gently. 2-way You will tighten up the coil knob later. adjustable 3.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 7 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Detecting Activities (continued) Relic Hunting Relic hunting is searching for historical artifacts. The most common desired objects are battlefield debris, coins, jewelry, harness hardware, metal buttons, trade tokens, metal toys, household items, and tools used by workmen and trades people.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 8 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Mechanicals Detecting Activities BATTERIES Coinshooting The F75 requires four AA batteries. These non-rechargeable chemistries may be used: Alkaline, Nickel Oxy-Hydroxide (Panasonic Oxyride or Duracel PowerPix), and lithium iron disulfide (Energizer L91). Nickel metal hydride and nickel-cadmium rechargeable chemistries may also be used.
F75 Comprehensive Operating Manual & Guide to Metal Detecting Mechanicals (continued) ARM REST The arm rest WIDTH and POSITION are both adjustable. Arm Rest Width: The sides of the arm rest can be bent inward and outward. To best stabilize the detector to your arm and body movement, squeeze the sides of the arm rest around your forearm.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 10 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Introduction to the Fisher F 75 Search Techniques (continued) HIGH PERFORMANCE The F75 is a multi-purpose high-performance computerized metal detector.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 11 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Search Techniques (continued) Controls NUISANCE BURIED OBJECTS In some areas there is a lot of metallic trash which produces weak signals. These could include deeply buried objects, little bits and pieces of rusty iron and corroded foil. These items can be detected, but are difficult to pinpoint due to their depth and small size.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 12 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Controls (continued) The F75 has two controls on the front panel, MENU and SETTINGS. MENU Pushbutton (Red button on right of the front panel) Push the MENU button to: 1. Step through the menu selections on the display. With each push of the button, the next menu selection will be highlighted.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 13 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Search Techniques (continued) The Menu System Estimating Target SIZE, DEPTH, and SHAPE The entire menu is printed on the LCD display. The display highlights the mode and settings which are in use. When the trigger is pulled to activate Pinpoint, the LCD displays estimated depth.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 14 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Ground Balancing Search Techniques What is Ground Balancing? All soils contain minerals. Signals from ground minerals are often tens or hundreds of times as strong as the signal from a buried metal object. The magnetism of iron minerals, found in nearly all soils, causes one type of interfering signal.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 15 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Capabilities And Limitations (continued) Ground Balancing (continued) STEEL BOTTLE CAPS & FLAT IRON TRASH Modern motion-type target ID metal detectors usually have difficulty consistently identifying steel bottle caps and other flat iron trash objects.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 16 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Ground Balancing (continued) 3. Turn the SETTINGS KNOB to adjust the setting. The goal is to eliminate the sound as the coil is being pumped over the ground. In some soils, the sound is not completely eliminated. If the ground balance adjustment is incorrect, there will be a difference in the sound as the searchcoil is either moving toward or away from the ground.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 17 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Capabilities And Limitations Comprehensive Operating Manual & Guide to Metal Detecting Motion All Metal Mode DEPTH The F75 can detect U.S. coins to a depth of up to 15-16 inches (37-40cm) under good conditions. Large objects (55 gallon drums, manhole covers, etc.) can be detected to a depth of up to several feet (1-2 meters).
F75-MANUAL.qx6 8/15/07 9:42 AM Page 18 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Static All Metal Mode Frequency Shifting This mode is useful for finding large, deep objects, i.e. larger than a coin and deeper than 12 inches (30cm). STATIC functions similar to PinPoint but occupies a different position on the user interface. The audio signal gets stronger as the searchcoil approaches the ground.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 19 F75 F75 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.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 20 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Discrimination Mode (continued) NOTCH Unlike Discrimination Level, which eliminates all targets from the left of the scale to the right, NOTCH can eliminate and re-include targets within the scale displayed at the top of the display. Inclusion or exclusion of target ranges is indicated with a half-crossed or crossed icon.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 21 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting LCD Visual Display In normal operation, when the searchcoil passes over a metal object, the electrical signature (2-digit I.D.) of the metal object is displayed on the numeric display for 4 seconds, unless superceded by another detected object.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 22 F75 F75 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 mediumhigh 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.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 22 F75 F75 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 mediumhigh 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.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 21 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting LCD Visual Display In normal operation, when the searchcoil passes over a metal object, the electrical signature (2-digit I.D.) of the metal object is displayed on the numeric display for 4 seconds, unless superceded by another detected object.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 20 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Discrimination Mode (continued) NOTCH Unlike Discrimination Level, which eliminates all targets from the left of the scale to the right, NOTCH can eliminate and re-include targets within the scale displayed at the top of the display. Inclusion or exclusion of target ranges is indicated with a half-crossed or crossed icon.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 19 F75 F75 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.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 18 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Static All Metal Mode Frequency Shifting This mode is useful for finding large, deep objects, i.e. larger than a coin and deeper than 12 inches (30cm). STATIC functions similar to PinPoint but occupies a different position on the user interface. The audio signal gets stronger as the searchcoil approaches the ground.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 17 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Capabilities And Limitations Comprehensive Operating Manual & Guide to Metal Detecting Motion All Metal Mode DEPTH The F75 can detect U.S. coins to a depth of up to 15-16 inches (37-40cm) under good conditions. Large objects (55 gallon drums, manhole covers, etc.) can be detected to a depth of up to several feet (1-2 meters).
F75-MANUAL.qx6 8/15/07 9:42 AM Page 16 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Ground Balancing (continued) 3. Turn the SETTINGS KNOB to adjust the setting. The goal is to eliminate the sound as the coil is being pumped over the ground. In some soils, the sound is not completely eliminated. If the ground balance adjustment is incorrect, there will be a difference in the sound as the searchcoil is either moving toward or away from the ground.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 15 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Capabilities And Limitations (continued) Ground Balancing (continued) STEEL BOTTLE CAPS & FLAT IRON TRASH Modern motion-type target ID metal detectors usually have difficulty consistently identifying steel bottle caps and other flat iron trash objects.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 14 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Ground Balancing Search Techniques What is Ground Balancing? All soils contain minerals. Signals from ground minerals are often tens or hundreds of times as strong as the signal from a buried metal object. The magnetism of iron minerals, found in nearly all soils, causes one type of interfering signal.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 13 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Search Techniques (continued) The Menu System Estimating Target SIZE, DEPTH, and SHAPE The entire menu is printed on the LCD display. The display highlights the mode and settings which are in use. When the trigger is pulled to activate Pinpoint, the LCD displays estimated depth.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 12 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Controls (continued) The F75 has two controls on the front panel, MENU and SETTINGS. MENU Pushbutton (Red button on right of the front panel) Push the MENU button to: 1. Step through the menu selections on the display. With each push of the button, the next menu selection will be highlighted.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 11 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Search Techniques (continued) Controls NUISANCE BURIED OBJECTS In some areas there is a lot of metallic trash which produces weak signals. These could include deeply buried objects, little bits and pieces of rusty iron and corroded foil. These items can be detected, but are difficult to pinpoint due to their depth and small size.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 10 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Introduction to the Fisher F 75 Search Techniques (continued) HIGH PERFORMANCE The F75 is a multi-purpose high-performance computerized metal detector.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 9 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Search Techniques (continued) Mechanicals (continued) Tips on ground balancing ARM REST When the F75 first turns on, the ground balance setting is preset to 90. This will give a positive response on nearly all soils. If you search in the Discrimination mode, you will probably not have to balance to the ground.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 8 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Mechanicals Detecting Activities BATTERIES Coinshooting The F75 requires four AA batteries. These non-rechargeable chemistries may be used: Alkaline, Nickel Oxy-Hydroxide (Panasonic Oxyride or Duracel PowerPix), and lithium iron disulfide (Energizer L91). Nickel metal hydride and nickel-cadmium rechargeable chemistries may also be used.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 7 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Detecting Activities (continued) Relic Hunting Relic hunting is searching for historical artifacts. The most common desired objects are battlefield debris, coins, jewelry, harness hardware, metal buttons, trade tokens, metal toys, household items, and tools used by workmen and trades people.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 6 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Assembly Detecting Activities (continued) Battery Compartment Headphone Jack 1. Remove all components from box. Release Clip 2. Attach searchcoil to lower rod by lining up the holes. Push coil knob through hole and tighten knob gently. 2-way You will tighten up the coil knob later. adjustable 3.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 5 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Detecting Activities (continued) Gold Prospecting (continued) minerals, serious gold prospecting requires a detector with high sensitivity and true ground balanced motion all metal operation. Run the machine with the sensitivity high enough to hear some noise from ground minerals, and learn the language of the sounds you hear.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 4 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting Specifications Detecting Activities (continued) Mechanical: S-rod with electronics housing mounted on handgrip, 3-piece breakdown, batteries under elbow, 2-way armrest adjustment — forward/backward & around forearm. Searchcoil: 11” (28 cm) open-frame elliptical double-D, waterproof. Batteries: 4 AA, alkaline (included). Weight: 3.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 3 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Detecting Activities (continued) Shallow Water Hunting (continued) Both fresh and salt water beaches are popular places for metal detecting. Vacationers lose money and jewelry playing in the sand and in the water. It is usually easy to dig in a beach environment, and metal detecting is permitted on most beaches.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 2 F75 F75 Comprehensive Operating Manual & Guide to Metal Detecting Comprehensive Operating Manual & Guide to Metal Detecting How Metal Detectors Work T he F75 is a multipurpose metal detector. Its most popular uses are coinshooting and relic hunting, and it is also well-suited to gold prospecting. PRODUCT FEATURES • Light weight and well-balanced: best ergonomically engineered detector in the industry.
F75-MANUAL.qx6 8/15/07 9:42 AM Page 1 F75 Comprehensive Operating Manual & Guide to Metal Detecting 5-Year Limited Warranty The F75 metal detector is warranted against defects in materials and workmanship under normal use for five years from the date of purchase to the original owner. Damage due to neglect, accidental damage or misuse of this product is not covered under this warranty. Decisions regarding abuse or misuse of the detector are made solely at the discretion of the manufacturer.