Fisher | F19 | Users Manual | Fisher F19 Users Manual

Fisher F19 Users Manual
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Fisher Padded Carry Bag
Rugged double stitched construction. Includes handy exterior
pocket for extra batteries or small accessories. – 103693000C
Fisher Camo Backpack
Large camouflage and black with Fisher® logo. – FCBACKPACK
Fisher Camo Pouch
Camo pouch with two inside pockets, belt included. – PCH-F
Fisher Stereo Deluxe Headphones
Adjustable single-volume control, 1/4 jack” jack, aluminum cones and coiled cord. 9720971000
Stereo Headphones
Use with Fisher® metal detectors. Lightweight and adjustable with true stereo sound, adjustable
volume, 1/4 jack with 1/8 adaptor, 4’ cable. – 9720950000
Metal Sand Scoop
Large galvanized metal scoop with filtering holes. Strong Rubberized grip. – SAND SCOOP
Gold Pick
Tempered steel head is 10” long, edge is 3-1/4” wide, overall length 19”. Durable fiberglass
handle, rubberized grip and super magnet attached to the head. – GOLDPICK
Lesche Knife
Made from high quality heat-treated tempered steel. The ultimate digging tool.
Comes with a durable sheath. 12" in length with a 7" serrated blade. – LESCHE KNIFE
Fisher Baseball Cap
One-size-fits-all. – FCAP
Fisher Camo Baseball Cap
One-size-fits-all. Velcro closure, camouflage with Fisher® logo. – FCCAP
Fisher Coffee Mug
16oz, stainless steel and plastic – FMUG
Fisher T-Shirt
100% cotton with Fisher® Logo. Sizes: S, M, LG, XL & XXL – FTSHIRT
Replacement/Accessory Searchcoils
11” DD Elliptical, Open Accessory Coil – 11COIL-GB
*10” DD Elliptical, Closed Accessory Coil – 10COILDD-FRL
5” DD Round, Closed Replacement Coil – 5COIL-GBUG
Coil Covers*
Specially made to protect your coil from abrasion and damage.
11” DD Coil Cover – COVER-11DD
10” Biaxial Accessory Coil Cover – 202319000
5” DD Coil Cover – 5COVER-BLK
Rain Cover
Specially designed to protect your detector from dirt and water – RAINCOV-GB
Prospecting Kits
Use 9-volt
ALKALINE batteries.
Do not use
“Heavy Duty” batteries.
Do not use
ordinary “Zinc Carbon” batteries.
*Image not shown.
r ev 1
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Quick-Start Demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Basics Of Metal Detecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
Ground Minerals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Trash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Identifying Buried Objects . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Size and Depth of Buried Objects . . . . . . . . . . . . . . . . . . . . .11
Electromagnetic Interference (EMI) . . . . . . . . . . . . . . . . . . . .11
Operation and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Control Knobs
Off / On / Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Disc / All Metal / Threshold . . . . . . . . . . . . . . . . . . . . . . . .13
Touchpad Controls
Menu/Ground Grab® (Computerized Ground Balancing) . . . .14
+ and - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Pinpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Operating in All Metal Mode
Ground Grab® (Computerized Ground Balancing) . . . . . . . .15
Setting the Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Unwanted Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Sweeping the Searchcoil . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
r eading the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Target Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Operating in Discrimination Mode
Ground Grab® (Computerized Ground Balancing) . . . . . . . .17
Setting the Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19
Unwanted Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Sweeping the Searchcoil . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Using Pinpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
r eading the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-22
Ground Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-25
Ground Balancing Technical Info . . . . . . . . . . . . . . . . . . . . . . . . . .26
Target Display & Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Gold Prospecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
r elic Hunting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Hot r ocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Electromagnetic Interference (EMI) . . . . . . . . . . . . . . . . . . . . . .31-32
Search Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Target Pinpointing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Optional 5”DD Searchcoil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Device Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Treasure Hunter’s Code of Ethics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover
Copyright© 2015 by Fisher Research Labs, Inc.
All rights reserved, including the right to reproduce this book, or parts thereof, in any form.
Published by Fisher Research Labs, Inc.
Fisher® is a registered trademark of Fisher Research Labs, Inc.
1465 Henry Brennan Dr., El Paso, TX 79936 • (915) 225-0333
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Congratulations on your purchase of the new F19™ metal detector. The F19™
has been custom designed to find the smallest targets, provide superior target
separation and features advanced discrimination control.
Register your warranty on- line for a chance to win a
For details, visit
The F19™ metal detector is warranted against defects in materials
and workmanship under normal use for 5 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.
Proof of Purchase is required to make a claim under this
Liability under this Warranty is limited to replacing or repairing, at
our option, the metal detector returned, shipping cost prepaid to
Fisher Labs. Shipping cost to Fisher Labs is the responsibility of the
To return your detector for service, please first contact Fisher Labs
for a r eturn Authorization (r A) Number. r eference the r A
number on your package and return the detector within 15 days of
calling to:
Fisher Research Labs, Inc.
1465 Henry Brennan Dr.
El Paso, TX 79936
Phone: 915-225-0333 ext.118
This Warranty may vary in other countries; check with your distributor
for details.
Warranty does not cover shipping costs.
Warranty coverage does not include the cost of transporting
the detector back to an owner who is located outside of the
United States of America.
Whether you use your Detector in the backyard, at the shoreline, in the
mountains or fields afar, your investment will let you experience the excitement
of searching for yet to be discovered treasures and give you years of outdoor
enjoyment. Buried treasure can be as near as your own door step and stretch
from horizon to horizon. On your own or with friends, you’ll never run out of
places to use your F19.
This manual has been written to help you get optimal use of your detector, so we
hope you will read it thoroughly before your first outing and will also refer back to
this manual from time to time to reinforce features and methods as you become
more proficient in the field.
Happy Hunting from Fisher Research Labs!
Introduction to the F19
The new F19™ is unique among relic hunting detectors for its versatile
function as an all-purpose treasure detector and also its high sensitivity to
small gold nuggets.
The controls, menu options and features are tailored to relic-hunting, including
a sophisticated ground balancing system, separate control over
signal gain and threshold and a unique discrimination control
system. These features also make for a great gold prospecting detector,
especially when the F19 is outfitted with the optional 5” DD
searchcoil. While the F19 makes for a highly competent coinshooting
detector, its user interface and features are not specifically
designed for this purpose. As a coin-shooter, you will notice that the
F19 exhibits slightly lower sensitivity to high-conductivity coins,
like a U.S. quarter; this is a result of its specialized design to
emphasize sensitivity to smaller, lower conductivity metals like relics and
gold nuggets.
The F19 is outfitted with a 10”DD closed elliptical searchcoil as standard
equipment since this searchcoil construction is best-suited to relic-hunting.
At the trashiest sites, you may find the smaller optional 5”DD searchcoil makes
pinpointing easier, is better suited to penetrate highly mineralized soils and
improves target separation.
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The following terms are used throughout the manual, and are standard
terminology among detectorists.
A relic is an object of interest by reason of its age or its association with
the past. Many relics are made of iron, but can also be made of bronze
or precious metals.
Iron is a common, low-grade metal that is an undesirable target in certain
metal detecting applications. Examples of undesirable iron objects are old
cans, pipes, bolts and nails.
Sometimes, the desired target is made of iron. Property markers, for
instance, contain iron. Valuable relics can also be composed of iron;
cannon balls, old armaments and parts of old structures and vehicles can
also be composed of iron.
Metals which are made of, or contain, iron.
According to FCC part 15.21 Changes or Modifications made to this device not expressly approved by
the party responsible for compliance could void the users authority to operate this equipment.
This device complies with FCC Part 15 Subpart B Section 15.109 Class B.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC r ules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
-- r eorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help
This device complies with Industry Canada license-exempt r SS standard(s). Operation is subject
to the following two conditions: (1) this device may not cause interference, and (2) this device must
accept any interference, including interference that may cause undesired operation of the device.
This radio transmitter 8188A-F19MD has been approved by Industry Canada to operate with the
antenna types listed below with the maximum permissible gain and required antenna impedance
for each antenna type indicated. Antenna types not included in this list, having a gain greater than
the maximum gain indicated for that type, are strictly prohibited for use with this device.
r eference to a metal being "eliminated" means that the detector will not
emit a tone, nor display a Target-ID, when a metal object passes through
the searchcoil's detection field.
When the detector emits different tones for different types of metals, and
when the detector "eliminates" certain metals, we refer to this as the
detector "discriminating" among different types of metals.
Discrimination is an important feature of professional metal detectors.
Discrimination allows the user to ignore trash and otherwise undesirable
Pinpointing is the process of finding the exact location of a buried object.
Long-buried metals can appear exactly like the surrounding soil, and can
therefore be very hard to isolate from the soil.
Meaning “voltage controlled oscillator,” the V.C.O. audio method causes
both the audio pitch and the volume to rise as signal strength increases.
V.C.O. improves the user's ability to interpret a target's size and depth.
Very weak signals (for small or very deeply buried objects) have the
faintest volume and the lowest pitch. Larger objects, and those closer to
the searchcoil, will induce a higher volume and higher pitch sound.
Ground Balancing is the ability of the detector to ignore, or "see through,"
the earth's naturally occurring minerals, and only sound a tone when a
metal object is detected. This detector incorporates proprietary circuitry to
eliminate false signals from many mineralized soils.
5” DD Coil, Part Number 5COIL-GBUG
10” DD Coil,Part Number 10COILDD-Fr L
11” DD Coil, Part Number 11COIL-GBUG
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a
type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce
potential radio interference to other users, the antenna type and its gain should be so chosen that
the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful
Le présent appareil est conforme aux CNr d’Industrie Canada applicables aux appareils radio
exempts de licence. L’exploitation est autorisée aux deux conditions suivantes : (1) l’appareil ne
doit pas produire de brouillage, et (2) l’utilisateur de l’appareil doit accepter tout brouillage
radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.
Le présent émetteur radio 8188A-F19MD a été approuvé par Industrie Canada pour fonctionner
avec les types d’antenne énumérés ci-dessous et ayant un gain admissible maximal et l’impédance
requise pour chaque type d’antenne. Les types d’antenne non inclus dans cette liste, ou dont le
gain est supérieur au gain maximal indiqué, sont strictement interdits pour l’exploitation de
Conformément à la réglementation d’Industrie Canada, le présent émetteur radio peut fonctionner
avec une antenne d’un type et d’un gain maximal (ou inférieur) approuvé pour l’émetteur par
Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l’intention des
autres utilisateurs, il faut choisir le type d’antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l’intensité nécessaire à l’établissement d’une
communication satisfaisante.
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Immediately after powering on, your detector's unique 10-digit serial
number is displayed once on the LCD. Two digits are displayed at a
time; five 2-digit numbers are displayed in sequence. This 10-digit
serial number is the same serial number imprinted on the label inside
the battery compartment and on the box.
The armrest may be moved
forward or backward by removing
the single screw and nut, and then
repositioning the 2-piece armrest.
Users with shorter arms may find
the armrest more comfortable in
the forward position. In order to
move the armrest backward, the
plastic plug must be removed from
the aluminum tube.
Arm Strap
Armrest Strap
The detector can always be used
without the strap, with no
compromise to detector balance
and stability under most conditions.
Some users prefer to use the strap
when swinging the detector
vigorously, in order to hold the
detector securely against the arm.
1/4” Headphone Jack
• Always check Federal, State, County and local laws before searching.
• Respect private property and do not enter private property without the
owner’s permission.
• Take care to refill all holes and leave no damage.
• Remove and dispose of any and all trash and litter found.
• Appreciate and protect our inheritance of natural resources, wildlife and
private property.
• Act as an ambassador for the hobby; use thoughtfulness, consideration and
courtesy at all times.
• Never destroy historical or archaeological treasures.
• All treasure hunters may be judged by the example you set; always conduct
yourself with courtesy and consideration of others.
Reactive overload: 10,000 micro-cgs (with standard searchcoil)
Resistive overload: 1,200 micro-cgs (with standard searchcoil)
Ground balance range: From ferrite to salt water inclusive
Discrimination ground suppression: Combination of 2nd and 3rd
order methods
Target-ID ground suppression: 3rd order
Battery life: 15+ hours on good quality alkaline (less using backlight)
Operating temp range: 14 to 122 degrees F (-10 to +50 C)
Operating humidity range: 0 - 90% noncondensing
Adjusting the Armrest
Mechanical: S-rod with electronics housing on rod, 3-piece breakdown
construction, nonmetallic telescoping lower rod, adjustable position Armrest
Weight: 2 lbs. 12 oz. (1.25 kg) with battery installed
Standard searchcoil: 10 inch (25.4 cm) closed-frame elliptical biaxial,
Batteries: Single 9 volt rectangular alkaline
Operating principle: VLF induction balance
Operating frequency: 19.2 kHz, crystal controlled
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Relic-Hunting and Coin-Shooting
with the Optional 5” DD Searchcoil
Caution: Forcing in MIDDLE STEM with CAM
LOCK raised may form a burr on
cam lock. If this happens, remove
burr with knife to allow insertion.
Assembly is easy and
requires no tools.
Position S-r od upright.
r otate the
fully in the
Insert your finger
inside the tube and
make sure the INTEr NAL CAM LOCK is flush with the
inside of the tube.
Insert the MIDDLE STEM into the S-r OD,
with the SILVEr BUTTON pointed upward
r otate the MIDDLE STEM until the SILVEr BUTTON
snaps into the hole.
Twist the LOCKING COLLAr fully in the clockwise direction
until it locks.
r epeat this process on the LOWEr STEM.
Adjust the LOWEr STEM to a length that lets you maintain a
comfortable upright posture, with your arm relaxed at your side,
and the SEAr CHCOIL parallel to the ground in front of you.
If you want a smaller sweep area, the 5” DD should be considered.
Using the BOLT and KNUr LED KNOB, attach the
at the bottom.
11 Connect CABLE PLUG to housing.
Do not twist the Cable or Plug. Turn Locking r ing only. Use
minimal finger pressure to start the threads. Do not crossthread. When the Locking r ing is fully engaged over the
threaded connector, give it a firm turn to make sure it is very
tight. When the Locking r ing is fully engaged over the
threaded connector, it may not cover all of the threads.
For information about
the 5” DD searchcoil
(Part# 5COIL-GBUG,
Please call
The Gold Bug Coil operates with the Fisher® F19
Secure cable with velcro straps as shown.
Very tall users can purchase the optional Extended
Lower Stem (TUBE5X), for extended reach.
Tighten both LOCKING COLLAr S.
* Note:
Advantages of the 5” DD searchcoil over the standard 10” searchcoil are:
1. More separation between adjacent buried targets.
Better at extremely trashy sites.
2. More sensitivity to the tiniest targets and gold pieces.
3. Fits into tight spaces.
10 Wind the CABLE securely around the STEMS, leaving slack
The standard 10” elliptical F19™ searchcoil is engineered for target separation
and a wide sweep. This searchoil is ideal for searching field stubble and forest
debris often associated with relic hunting sites.
While the F19™ is a high performance, specialized relic hunting metal detector,
it is also a good multi-purpose detector. With the purchase of a 5” DD searchcoil,
you can bring more precision to your coin-shooting and gold prospecting
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After you have identified a target using Discrimination Mode,
press-and-hold the PINPOINT button to identify the target’s exact
location. This technique can yield more information about the target’s
shape and size and also find its exact location to facilitate extraction.
Pinpoint as follows:
1. Position the searchcoil just barely off the ground, and to the side of
the target.
2. Now move the searchcoil slowly across the target; you can locate
it by the sound. The target is located directly under where the
sound is loudest.
Narrow It Down:
1. To narrow the response further, position the center of the searchcoil
near the center of the response pattern, but not directly over the
2. r elease the PINPOINT button.
3. Press-and-hold PINPOINT button again.
4. r epeat this narrowing procedure to narrow the field of detection
Note: Depth indication is less accurate
after narrowing.
A 3-segment battery indicator at the top-left of the display indicates the
battery condition.
The detector requires a single 9-volt ALKALINE battery.
Do not use ordinary zinc carbon batteries.
Do not use “Heavy Duty” batteries.
Such low quality batteries may work in the detector but have a short life and
are prone to leakage.
r echargeable batteries can also be used.
If you wish to use rechargeable batteries, we recommend using a
Nickel Metal Hydride rechargeable battery.
The battery compartment is located on the back side of the housing.
Slide the battery door to the side and remove it to expose the battery
Expect about 15 to 20 hours of life from a 9-volt alkaline battery, without use
of backlight.
Backlight increases power consumption and decreases battery life, with
significant power drain at maximum brightness.
r echargeable batteries can provide up to 8 hours of usage per charge.
You may notice the speaker volume drop when only one battery segment is
With one segment flashing, low speaker volume will be very apparent.
If you plan to use the
realize that drift will occur
over time, causing the
detector to gain or lose
sensitivity. Periodic retuning
of the detector is required to
minimize drift; release and
press PINPOINT again to
The 3-segment battery indicator has 4 stages of indication.
These indications are accurate for a 9-volt alkaline battery.
Segments Illuminated
Battery Voltage
3 -segments
more than 8.4 volts
2 -segments
more than 7.5 volts
1 -segment
more than 6.8 volts
1 -segment flashing
less than 6.8 volts
After the 1st segment begins flashing, expect the detector to shut off within 10
A rechargeable battery will usually illuminate two to three segments
throughout most of its useful charge. But as soon as it drains to the 1-segment
level, it will then lose its charge very rapidly.
Alkaline batteries may be disposed of in a normal waste receptacle or
recycled. Non-Alkaline batteries should be recycled. In the state of California
all battery types must be recycled. Please refer to local municipalities for
detailed disposal and recycling requirements.
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Supplies Needed
• a Nail
• a Zinc Penny (dated after 1982)
• a Nickel
• a Quarter
Position the Detector
a. Place the detector on a table,
with the searchcoil hanging over
the edge. Or better, have a friend
hold the detector, with the
searchcoil off the ground.
b. Keep the searchcoil away from
walls, floors and metal objects.
c. r emove watches, rings and
d. Turn off fluorescent lights,
appliances and cell phones
whose electromagnetic emissions may
cause interference.
e. Pivot the searchcoil back.
III. Click on power with the left knob. Set the Gain at the 12:00
position for this demonstration.
IV. Click the right knob to the left to enter DISC setting.
until “VOLUME” is highlighted on display.
a. Press
until number on display is 12.
b. Wave the nail over the searchcoil. Notice volume.
c. Wave a coin over the searchcoil. Notice louder volume.
d. Enter the menu/volume control again.
to change volume as you wave nail over
searchcoil. Notice the volume changing.
VI. a. Set volume at 20. Wave the nail over the searchcoil.
b. Press
until DISC is highlighted on display.
c. Press
repeatedly, while continuing to wave the nail.
The nail will be discriminated out. The Target-ID at which it is eliminated
depends on the size of the nail.
VII. Wave each object over the searchcoil.
Sweep coins flat and parallel to the searchcoil. This is how
you will usually find them buried.
a. Notice the 2-digit Target-IDs for each object.
b. Motion is required.
Objects must be in motion over the searchcoil to be
detected in this mode.
Target Verification
After detecting a target, do the
1. Walk around the target in a circle.
2. While circling the target, continue
sweeping the searchcoil across the
3. Sweep once every 30° or 40° of
the circle.
If the tone does not change and
the Target-ID value is consistent as
you circle the target, you can be
highly confident of the target’s
If the tone or Target-ID changes
as you circle the target, you may
have multiple targets or an
When swinging the searchcoil,
be careful to keep it level with the
irregularly shaped object.
ground about 1/2 inch from the surIf the tone completely
face. Never swing the searchcoil
disappears at different angles, the
like a pendulum.
target may be trash or a low-value
If you are new to the hobby, dig all targets. With practice in the field, you
will soon be able to correlate audible and visual target feedback with
certain types of metal objects.
Pinpointing in Discrimination Mode:
Sweep over target in narrowing side-to-side pattern.
Take visual note of spot on ground where “beep” occurs.
Step 90° to the side of the target.
Sweep searchcoil over same area, at 90° to 1st sweep pattern.
This pinpoints the target location with an “X.”
Quick-Start Demo continued on next page
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 9
EMI is usually easier to control in the All Metals Mode than in the Discrimination
On the F19™, setting the discrimination level between 20 and 30 will usually
reduce interference. In the Discrimination Mode, the detector may chatter if the
searchcoil is not in motion, but once you start sweeping it over the ground, the
signal from the ground will usually suppress the EMI chatter, except for an
occasional pop or click which will not sound like a real target.
If you are conducting an indoor demonstration, you may find that changing the
orientation of the searchcoil will reduce the pickup of EMI.
If you carry a cell phone or other high-tech electronic equipment while metal
detecting and you encounter EMI, try turning the device off and see if that solves
the problem. Turn such devices completely off, not just into standby mode.
When working near overhead power lines, you may get the best results right under
the power line and the worst results when standing at a 30° to 45° angle to the
power line.
Many sources of EMI are intermittent. You may find that an area which is difficult
to search at one time of day may be easier after 5 PM, or on weekends. Power
lines are usually quietest late at night, and on weekend mornings.
Small searchcoils usually pick up less EMI than larger searchcoils. On a site with
severe electrical interference, a small searchcoil is often a better choice than a
large one.
VIII. Press-and-hold
and hold the nickel over the searchcoil
a. Notice that motion is not required.
A motionless object induces a hum.
b. Notice the variable pitch & volume hum.
c. Move the nickel closer to and farther away from the searchcoil.
Notice the changing “depth” values.
IX. Click the MODE knob to the right.
The detector is now in the ALL METAL Mode
a. Keep GAIN set at the 12:00 position
b. r otate the THr ESHOLD knob slowly from the far counterclockwise
position to the full clockwise position.
Notice these attributes of the THr ESHOLD control, with no metal
over the searchcoil.
i. at low settings you will hear no sound
ii. at mid-scale, there will be a transition point from no sound to
a barely audible, choppy sound.
iii. at full scale you will hear a loud, constant tone. It may also have
an irregular or choppy sound, as a result of electromagnetic
interference emitted from other electrical devices.
Distinguishing Electromagnetic Interference from other problems
EMI will often vary as you walk around from place to place, and it will also vary with
changes in the orientation of the searchcoil. This is almost never the case if there
is a functional problem with the metal detector itself.
The most common cause of a noisy metal detector, where the problem is not EMI,
is a defective searchcoil. If striking the searchcoil with your hand causes the noise
to start or stop, the problem could be a defective searchcoil. Also, a defective
searchcoil often causes noise of a more intermittent nature than electrical
The second most common cause is a loose searchcoil connector. The noise from
a loose connector will usually be very erratic or intermittent in nature. Try
unplugging the searchcoil and then reconnecting it to ensure the connector is firmly
If you use a searchcoil cover, dirt or water can accumulate inside it, and movement
of those materials can cause false signals while sweeping the searchcoil.
Searchcoil covers must be periodically removed and cleaned.
USE WITH HEADPHONES (not included)
The F19™ is equipped with a 1/4” headphone jack. Any headphones with a 1/4”
stereo plug will work; headphones with a mono plug will not work. Using
headphones extends battery life, and also prevents the sounds from bothering
bystanders. It also allows you to hear subtle changes in the sound more clearly,
particularly if searching in a noisy location. If gold prospecting, gold nuggets are
often very small, so closely monitoring changes in sound using headphones will
improve your gold prospecting results. For safety reasons, do not use headphones
near traffic or where other dangers are present. This device is to be used with
interconnecting cables/headphone cables shorter than three meters (ten feet).
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 10
A hobby metal detector is intended for locating buried metal objects. When
searching for metals, underground or on the surface, you have the following
challenges and objectives:
You are likely to encounter electromagnetic interference (EMI) when using your F19™
metal detector. It is important that you recognize EMI and take appropriate measures
to deal with it. This will prevent you from giving up on a worthwhile search site, or from
returning a properly functioning detector for repair.
1. Ignoring signals caused by ground minerals.
2. Ignoring signals caused by metal objects that you do not want to find,
such as pull-tabs.
3. Identifying a buried metal object before you dig it up.
4. Estimating the size and depth of objects to facilitate digging them up.
5. Eliminating the effects of electromagnetic interference from other
electronic devices.
Your F19™ metal detector is designed with these points in mind.
Symptoms of Electromagnetic Interference
EMI can cause a metal detector to chatter spontaneously, to lose sensitivity for no apparent
reason, or to cause a periodic wobbly audio sound. What you hear will depend on what
operating mode you are using, the detector’s settings, and the source of the electrical
interference. The most common manifestation is spontaneous chatter.
All metal detectors are susceptible to EMI, but they vary in what kinds of interference
affect them. In a given environment some metal detectors may be affected by EMI
whereas others may not.
Common sources of Electromagnetic Interference
1. Ground Minerals
All soils contain minerals. Signals from ground minerals can interfere with
the signals from metal objects you want to find. All soils differ, and can
differ greatly, in the type and amount of ground minerals present. You
therefore want to calibrate the detector to the specific ground conditions
where you are hunting. The detector incorporates both automated and
manual ground balancing features which will eliminate false signals from
most types of soils. To maximize the detector’s target identification
accuracy and depth of detection, use the Gr OUND Gr AB®
COMPUTEr IZED Gr OUND BALANCING function to calibrate the
detector to the ground where you are searching. See the section on
Gr OUND BALANCING for details.
The Basics continued on next page
Common sources of EMI include: overhead electric power lines, underground power lines,
other metal detectors, telephone lines carrying electronic data, computer systems, electric
fences, old Cr T-based televisions, cell phones, CB and emergency communication
radios, thunderstorms, fluorescent lights, metal vapor lamps, military aircraft with electronic
warfare countermeasures turned on, electric motors, VLF military communications systems
and automobile ignition systems. At home, in a store, or in an urban environment, there
may be several different sources of interference present simultaneously.
All metal detectors generate a certain amount of internal electronic noise. The F19™ is
specifically designed to enable you to work into the noise. Experienced users, striving
for maximum depth, often adjust the machine to search with a constant audible
background sound, and then listen through that noise for the sound of real targets.
Stricter regulations in recent years have cut down on interference from electric light
dimmers and auto ignition systems. However there has also been a proliferation of
VLF-UHF wireless communication systems (cell phones, Bluetooth, Wi-Fi, etc.), which
often affect metal detectors. Overall, the potential for electromagnetic interference is
greater than it was just a few years ago.
Modern high-end metal detectors are a lot more sensitive than older units; this also
increases your detector’s vulnerability to EMI beyond what you may be accustomed to
with an older detector. Metal detectors are by their nature designed to detect magnetic
fields, and electric current always produces magnetic fields.
Coping with Electromagnetic Interference
The primary reason metal detectors provide a sensitivity (gain and/or threshold) control,
is so that users can reduce sensitivity in order to eliminate response to electrical
interference. Some users are reluctant to reduce sensitivity out of fear of losing depth.
At reduced sensitivity settings, you may lose some depth, but at least you can still
search. The Gain and Threshold knobs control the sensitivity and are your first
line of defense against EMI. The Threshold control only applies to the All Metal Mode.
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 11
A hot rock is a rock which causes the metal detector to sound off because the
rock contains iron minerals. They come in two basic types.
Negative hot rocks (also called cold rocks) are usually magnetite or
contain magnetite, and give a negative response because their ground
balance value is a higher number than the soil they are found in. They
tend to be dark in color, usually black, and usually heavy. In some cases
they will have rust stains. They are usually attracted to a magnet, and for
this reason gold prospectors always carry a magnet -- the ultimate
ferrous/nonferrous discriminator. In All Metal Mode, negative hot rocks
produce a boing sound rather than the zip sound of a metallic target;
recognize the difference and you will learn to ignore them. As the
searchcoil passes over a hot rock, this boing sound, or negative response,
is quite distinctive. To hear this response, you must be properly Ground
Balanced and in All Metal Mode with an audible threshold hum. First, as
the center of the searchcoil passes over the negative hot rock, the
detector will go quite; the threshold hum momentarily silences. Then,
passing beyond the negative hot rock, you hear the boing sound. As you
pass the searchcoil back and forth over a negative hot rock, it will be
impossible to pinpoint and will seem as if it moves around.
Positive hot rocks are iron-bearing rocks which have been oxidized by
natural weathering processes so that their GND BAL value is a number
lower than the soil they are found in. They are often small, right on the
surface, sound just like a gold nugget, and are common in many gold
prospecting areas. They are usually, but not always, drawn to a magnet.
They are most often reddish in color but are often black, brown, or yellow.
On relic hunting sites, red clay bricks and rocks which have lined a fireplace
or a campfire will often be hot rocks. The discriminator will usually eliminate
them without difficulty if widely scattered, but if there is a large concentration
of them, the discriminator may not quiet them all. In that case, you can
revert to the rule of thumb -- “don’t dig non-repeatable signals.”
r emember to always carry a magnet to help discriminate gold from hot rocks
and iron.
• Gold will not be attracted to a magnet.
• Pieces of iron will always be attracted to a magnet.
• Negative hot rocks will almost always be attracted to a magnet.
• Positive hot rocks will usually be attracted to a magnet.
2. Trash
If searching for coins, you want to ignore items like aluminum foil, nails and
pull-tabs. These undesirable items are generally identified toward the lower
end of the 1-99 scale. You can listen to the sounds of all objects detected,
and decide on what you want to dig up. Or you can eliminate unwanted
metals from detection by using the DISCr IMINATION feature.
3. Identifying Buried Objects
Different types of metals are classified along the arc at the top of the screen
on a 1-99 scale from left to right. A 2-digit numerical reading is also
provided in the middle of the display for more precise target identification in
Discrimination Mode.
4. Size and Depth of Buried Objects
When using the detector in the motion DISC Mode, the relative depth of an
object is displayed to the left of the display over the SIGNAL strength
indicator. A more accurate depth reading is available using PINPOINT.
Pinpoint displays estimated target depth, in inches. Pinpoint does not
require the searchcoil to be in motion to detect metals. The ability to hold
the searchcoil motionless over the target also aids in tracing an outline of
the buried object, or in pinpointing the exact location of the object using
techniques described in the pinpointing section of this manual.
5. Electromagnetic Interference (EMI)
Electromagnetic interference (EMI) can cause a metal detector to chatter
spontaneously, to lose sensitivity for no apparent reason, or to cause a
periodic wobbly audio sound. Common sources of EMI include power
lines, electronic communication equipment such as cellphones, fluorescent
lamps, military electronics such as radar, other metal detectors and
computer equipment.
Your first line of defense against EMI is to reduce the Gain and/or
Threshold. In areas with heavy EMI, operating at reduced sensitivity levels
will result in the loss of some depth, but at least the metal detector will be
See the section on ELECTr OMAGNETIC INTEr FEr ENCE for a more
thorough explanation of EMI and how to manage it.
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 12
Searching for coins and relics at Civil War or ghost town sites often
means detecting in heavy concentrations of iron and dealing with crop-stubble
or forest ground clutter.
The F19 can handle the toughest ground mineralization, capable of
ground balancing all the way to salt. With its fast retune speed and biaxial
searchcoil, the F19 creates superb target separation with impressive depth.
The 10” elliptical coil is ideal for working between brush, rocks and debris
commonly found at old abandoned sites. An expanded 40-point iron ID range
helps differentiate between larger iron objects and smaller nails and pieces.
With FeTone™ adjustable iron audio, the volume level of ferrous targets can
be lowered separate from the volume level of non-ferrous targets, allowing
desired targets to be heard much easier.
The fine-tune adjustable Notch Width can be used to target specific
unwanted items, such as shell casings or bottle caps, and the enhanced
V-Break®, our Variable Tone Breakpoint, allows the user to further customize
the detector’s settings to get unique audio on specific Target-ID ranges.
Combined, the Notch Width and V-Break features create endless variations
for fine tuning the detector to meet exact hunting needs.
An adjustable back-light on the display allows for hunting in low-light
NOTE: Immediately after powering on, your detector's unique 10-digit serial
number is displayed once on the LCD. Two digits are displayed at a time; five
2-digit numbers are displayed in sequence. This 10-digit serial number is the
same serial number imprinted on the label inside the battery compartment.
• Click the left knob clockwise to turn the detector ON.
• After clicking the knob on, continued clockwise rotation will increase the
“sensitivity” in DISC Mode or the “GAIN” in ALL METAL Mode.
• We suggest keeping the GAIN below 70 until you become familiar with
the detector’s operation.
• Click ON/OFF
• In DISC Mode rotate
to change GAIN
(sensitivity) from
1 to 100
rotate to change
GAIN from 5 to 100
in steps of 5
• In DISC Mode press
to cycle through
menu options
while bobbing coil
to set ground balance
Press-and-hold to
activate PINPOINT feature
• Click left to operate
in Discrimination
• Click to right to
operate in ALL METAL
• Rotate knob in
change THRESHOLD from
-40 to 40
In DISC Mode:
Change setting of active menu option
Change Ground Balance setting from 0 to 99.9
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 13
In the United States, gold is commonly found in the western
states, Alaska and in a few localities in the Appalachians.
Hillsides are the best areas for gold prospecting
using a metal detector, because hillsides cannot
be cleaned out by panning and dredging the
way streams can. Also, gold on hillsides,
not far from its source vein, tends to be
larger and more readily detected, than
alluvial (placer) gold, which tends to
get pounded to pieces and worn
away as it rolls along the
streambed. Even in a good
gold producing area,
detectorists often spend an
entire day without finding any
gold, but will dig bits and
pieces of other metal such as
birdshot, bullets and rusted tin
cans, etc. Another nuisance can be “Hot r ocks” - rocks containing
concentrations of iron oxides that sound like metal when passed over with the
detector. Discrimination is usually ineffective because the loss of sensitivity
resulting from discrimination is enough to make the little nuggets invisible.
Because most gold nuggets are tiny, and are usually found in soil which is
high in iron oxide minerals, serious gold prospecting requires a detector with
high sensitivity and true ground balanced All Metal operation. Set the detector
with the sensitivity high enough to hear some noise from ground minerals, and
learn the language of the sounds you hear. Headphones are recommended
unless there are safety issues (for instance rattlesnakes). Move the searchcoil
slowly and deliberately, carefully controlling its height above the ground to
minimize noise from iron minerals in the soil. If you hear ground noise, the
Ground Balance setting could be off, so perform the ground balancing
procedure again. The ground geology typically associated with the presence
of gold will tend to change over very short distances.
The Fe3O4 bar graph indicates the amount of iron mineralization in the soil. In
most gold fields, especially alluvial deposits, gold tends to be associated with
iron minerals, especially magnetite black sand. Therefore, to maximize gold
recovery, concentrate on areas where the bar graph indicates higher amounts
of iron mineralization.
a. Click right to turn on. Click left to turn off.
b. Turning the knob clockwise increases the detector’s sensitivity; the
higher the sensitivity, the deeper targets will be detected, and the more
likely the detector will be to detect very small targets.
c. As you turn the knob, notice the GAIN value at the bottom-right of the
screen displays your current sensitivity setting.
Sensitivity in DISC Mode
The left knob is labeled “GAIN” and in DISCr IMINATION Mode it alone
controls the sensitivity of the detector.
In All Metal Mode, GAIN increases as you rotate the knob clockwise.
THr ESHOLD is controlled independently using the right knob.
a. Click knob to the far-left “DISC” position and the detector enters
b. Click on clockwise to operate in ALL METAL Mode.
c. In ALL METAL Mode, rotate knob to change the threshold.
Threshold values range from -40 to +40.
In ALL METAL Mode, the Threshold control can be used in two ways.
Control knobs continued on next page
Gold Prospecting continued on next page
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 14
“Gain” increases, or multiplies, the strength of signals from buried metal objects.
For maximum detection of the smallest or most deeply buried objects, increase
the Gain. To minimize the weakest signals, reduce the Gain.
“Threshold” controls the detector’s audio level. Positive threshold values
increases the audio response of weak target signals. Negative threshold
values suppress sensitivity.
For searching at maximum sensitivity, first set the Gain at a low level. Then
set threshold into the positive region, with a comfortable background-hum
volume level. Then increase Gain to a comfortable level, free of chatter.
Increase Gain to a slight amount of chatter if you can tolerate the chatter
while searching.
For silent searching, set threshold to a negative number, and also reduce
Gain if necessary. Silent searching will result in the loss of some sensitivity.
1. MENU / GG
This button has a dual function, depending on the detection mode.
a. In DISC Mode, this control cycles through menu options. The active menu
option appears in bold on the display.
The menu times-out after 3 seconds.
b. In ALL METAL Mode, press-and-hold the button to activate Gr OUND Gr AB®.
Ground Grab® allows you to set the detector’s internal ground setting equal
to the phase of the ground you are searching over. See the section on
Ground Balancing for a more thorough explanation of this feature and the
reason for using it.
a. In Discrimination Mode,
change the setting of the active menu
b. In All Metal Mode,
provide a manual override to the Ground
Balance Setting.
Press-and-hold to activate the Pinpoint feature.
Pinpoint temporarily engages a no-motion detection mode. Searchcoil
motion is not necessary to detect metal. Any metal within the searchcoil’s
detection field will induce a sound. Pinpoint is generally used to determine
the exact location of a target previously detected in Discrimination Mode.
SIGNAL Indicator
The lower-left bargraph designates
SIGNAL strength only when operating in
Discrimination Mode.
The signal strength indicator at the bottomleft of the screen indicates how large or
close the buried metal target is.
If all bars are illuminated, the target is
large or close to the searchcoil.
If one or two bars are illuminated, the
target is far away or small, or both.
DEPTH Indicator
A target’s location and size can be verified
using the PINPOINT control.
Press PinPoint to temporarily detect metal
without searchcoil motion, and a
monotone hum.
While holding the PinPoint button, the
DEPTH indicator will appear. The
number beneath DEPTH represents the
distance of the object, in inches, from the
searchcoil. The Depth scale is calibrated
to coin-sized objects. For objects other
than a coin, the numeric value is a relative
measure of the target’s depth.
When a target is detected, the F19 will
respond with two types of sound:
1. V.C.O.
Oscillator): an audio response with
variable pitch and volume.
2. A LOW tone beep.
In Discrimination Mode, targets which fall
into the zone along the arc whose
segments are shaded will be identified
with a LOW tone beep and those whose
segments are solid with V.C.O.
As the user sets the discrimination level
with the
buttons, he is
determining which targets will be
All targets’ audio responses in All Metal
Mode will be V.C.O.
V.C.O. (Voltage Controlled Oscillator) is
an audio response which provides a good
feel for the target.
The stronger the target signal, the higher
the volume and the higher the audio pitch.
Very weak signals will have the faintest
volume and lowest pitch.
For this reason, the use of headphones
is always recommended for detecting the
smaller and deeper targets.
In Discrimination Mode the 2-digit target
indicator, in the middle of the screen,
provides a specific target value to help
identify buried targets more accurately.
With practice in the field, you will learn to
associate target values with the probable
identification of buried objects. The target
value can vary each time the searchcoil
passes over the target, depending upon
the orientation of the object and its
distance from the searchcoil.
As a starting point, refer to the table below.
TARGET Readout
The table below lists some common
experience in the field, you will recognize
many types of metal objects by their
numeric value.
foil from gum wrapper
47 - 48
U.S. nickel (5¢ coin)
typically 58
aluminum pull-tab
60 - 75
aluminum screw cap
70 - 80
zinc penny (dated after 1982)
typically 78
aluminum soda pop can
75 - 85
copper penny, clad dime
typically 83
U.S. quarter (25¢ coin), clad
typically 85
50¢ coin, modern clad
typically 87
old silver dollar coin
typically 89
US silver Eagle $1 coin
typically 91
Caution: The target indications are
visual references. Many other types of
metal can also be represented by a given
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 15
The All Metal Mode is more sensitive than the Discrimination Mode, and is used to
find all types of metal objects in the ground. The searchcoil must be in motion for
objects to be detected.
The Fe3O4 7-segment bar graph indicates the amount of ground mineralization,
independent of type, expressed as an equivalent volume concentration of
magnetite (Fe3O4). It updates every second. It is sensitive to motion and will give
the most accurate readings if you pump the searchcoil up and down several times
over the ground. The presence of metal or “hot rocks” will cause the readings to be
inaccurate. If you stop moving the searchcoil, the bar graph will go blank.
7 Bars
2 to 6 Bars
1 Bar
Very Low
% Fe3O4
over 1
.026 - 1.0
0.006 - .025
less than .006
over 2,500
61 - 2,500
15 - 60
less than 15
Magnetic susceptibility is expressed in micro-cgs units. In a saltwater environment
in the absence of iron minerals, the bar graph indicates relative electrical conductivity.
In soils with greater than 10,000 micro-cgs units of magnetic susceptibility, the
signal from the soil may saturate, or overload, the circuitry. This will not harm
the detector but the machine will not be usable in that condition. The solution
is to hold the searchcoil several inches above the soil surface so it is not “seeing
as much dirt.” By listening and watching you will know how high you need to
hold the searchcoil in order to avoid overload.
The highest magnetic susceptibilities are usually found in soils developed over
igneous rocks, in alluvial black sand streaks on beaches and in red clay soils of
humid climates.
The lowest magnetic susceptibilities are usually found in white beach sands of
tropical and subtropical regions, and soils developed over limestone.
Naturally occurring minerals in soil look like metal to a metal detector, so you want to
cancel out this mineral signal coming from the ground, and only detect the signal from
metal objects in the ground.
So before using your detector, set it in All Metal Mode and perform the automatic
ground balancing procedure. Press-and-hold the GG® COMPUTERIZED GROUND
BALANCING button while pumping the searchcoil up and down over the ground.
r elease the button when the sound evens out. The GND BAL number on the bottom
right of the screen is the detector’s internal setting which cancels out the minerals in
the ground. Different soils in different areas will require different GND BAL settings,
so balance to ground before you search.
Refer to the Ground Balancing section of this manual for a more in-depth explanation.
Setting the Controls
As you adjust any of the controls, notice that the values on the bottom-right of the
display indicate the settings of the value you are changing.
If you are new to metal detecting, start with the GAIN and THr ESHOLD controls at a
low enough setting that you do not hear too many unwanted sounds, like warble or a
loud hum. Set the GAIN at the 12:00 position, or less. Then set the THr ESHOLD to a
position where you hear a very slight background hum, or if you prefer, position the
knob just left of that position to a setting where the detector is silent.
Unwanted Noise
r ead the section on Electromagnetic Interference.
The F19™ is a highly sensitive device.
It is intended for use outdoors. Indoor operation will subject it to interference from a
wide variety of devices in the home or office.
Sweeping the Searchcoil
As you sweep the searchcoil over the ground, try to keep the searchcoil parallel to the
Avoid lifting the searchcoil at the end of your sweeps.
Operating in All Metal Mode continued on next page
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 16
Reading the Display
Most gold prospecting and relic hunting is done by ear. Listen for the louder sounds,
riding on top of the constant background hum.
As you sweep the searchcoil, notice the Fe3O4 (iron oxide) scale to the left of the
This indicates the amount of ground mineralization.
Most black sand is made of magnetite.
Gold nuggets are often found in concentrated black sand deposits.
For the best depth detection in highly mineralized soils, use the All Metal Mode.
For the most accurate Fe3O4 reading, pump the searchcoil over the ground.
While sweeping the searchcoil, also notice the GND PHASE value in the middle of the
GND PHASE is the ground phase; this indicates the type of minerals in the soil.
Within an area, the ground phase may change.
After ground balancing, periodically compare GND PHASE to GND BAL. If these two
numbers differ by a great deal, you may want to ground balance the detector again.
When not adjusting the knobs, the GND BAL setting will always appear on the
bottom-right of the display.
GND BAL is the detector’s internal ground balance setting. The detector’s default
ground balance setting is 82.9, which is the best starting point for achieving the
correct setting.
After you perform the Ground Grab® procedure, the GND BAL number will change
to match your soil.
You can change the current GND BAL setting by pressing the
See section on Ground Balancing for a more detailed explanation.
Experienced users often prefer to adjust the ground balance to get a weak
audible response when lowering the searchcoil to the ground. This is called
adjusting for positive response and is achieved by increasing the GND BAL
number with the
Target Scale
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.
When relic hunting, any Target-ID greater than 40 is a potential non-ferrous relic.
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 searchcoil.
If searching in All Metal Mode, you may want to switch back into Discrimination Mode,
after finding a target. r eview the 2-digit Target-ID provided in the Discrimination Mode
for a more precise target identification.
The goal of the Ground Balancing procedure is to eliminate the sound as the
searchcoil is being pumped over the ground. In some soils, the sound is not
completely eliminated.
After balancing to ground with Ground Grab® COMPUTEr IZED Gr OUND
BALANCING (GG) some users may want to further adjust the ground balance
setting manually.
To manually adjust ground balance:
1. Operate in ALL METAL Mode.
2. Pump searchcoil up and down over the ground as in the COMPUTEr IZED
Gr OUND BALANCING procedure.
while pumping
3. Press
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. It
sounds like you are either pulling the sound out of the ground, or pushing the
sound into the ground.
•If the sound is louder as you raise the searchcoil, increase the ground
balance setting.
•If the sound is louder as you lower the searchcoil, reduce the ground balance
NOTE: Experienced users often prefer to adjust the ground balance to get a weak
but audible response when lowering the searchcoil. This is called adjusting for
positive response.
The purpose of ground balancing is to adjust the metal detector to ignore ground
minerals. If the setting is incorrect, ground minerals will give either a positive or a
negative response, depending on which direction the adjustment is off.
Positive Response
If the GND BAL setting is too high a number, the response of minerals will be
positive. This means that when the searchcoil is lowered to the ground in
PinPoint or All Metal Mode, the sound will get louder as the searchcoil
approaches the ground. The sound will grow quieter as the searchcoil is raised.
What, if anything, you will hear in Discrimination Mode depends on the
discrimination setting.
When searching in an All Metal Mode, if ground balance is properly set to cancel
the ground, and you sweep over a positive hot rock, the rock will give a “zip”
sound similar to that of a metal object.
Negative Response
If the GND BAL setting is too low a number, the response of minerals will be
negative. When the searchcoil is lowered to the ground in PinPoint or All Metal
Mode, the machine will be silent. The machine will sound off as the searchcoil is
lifted away from the ground. What, if anything, you hear in Discrimination Mode
depends on the Discrimination setting.
When searching in All Metal Mode a negative hot rock will produce a “boing”
sound after passing over it, making it difficult to know where it is located. It will
not have the sound and “feel” of a metal object.
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 17
Understanding ground conditions assists the user in setting up the machine,
knowing when to readjust ground balance, and in understanding the responses
of the machine while searching.
This detector displays two kinds of ground data:
1. The type of mineralization (which affects where the ground phase should
be set). This is GND PHASE
2. The amount of mineralization (the greater the amount of mineralization,
the greater the loss of detection depth & ID accuracy; this loss is more
pronounced in Discrimination Mode). This is Fe3O4.
Discrimination is used to eliminate trash metal objects (e.g. nails, foil, pull-tabs) from
detection. The searchcoil must be in motion to detect metal. The Discrimination Mode
is less sensitive to small and deep objects than the All Metal Mode.
The goal of ground balancing is to equate the GND BAL number to the
PHASE number.
PHASE is the measurement of the ground.
GND BAL is the detector’s internal setting which calibrates the detector
to the ground’s phase.
Notice that the GND BAL number is three digits, with a decimal point.
PHASE has only two digits.
GND BAL is a higher resolution number, so may differ a bit from PHASE
in a perfectly balanced scenario.
After pumping and releasing Ground Grab® COMPUTEr IZED Gr OUND
BALANCING (GG), the exact measurement of the ground will be
transferred to the GND BAL setting.
The two-digit PHASE number displayed on the screen indicates the type of
ground mineralization.
Some typical ground mineralization types are:
0 – 10 Wet salt and alkali
5 – 25 Metallic iron. Very few soils in this range. You are probably over metal.
26–39 Very few soils in this range -- occasionally some saltwater beaches
40–75 r ed, yellow and brown iron-bearing clay minerals
75–95 Magnetite and other black iron minerals
96–99 Values over 95 are generally an indication of a searchcoil or
electronics defect or out-of-calibration condition.
Ground Balancing continued on next page
This feature is not available in Discrimination Mode.
Your best results will be achieved by first performing the COMPUTEr IZED Gr OUND
BALANCING procedure in All Metal Mode.
The ground balance setting achieved using COMPUTEr IZED Gr OUND BALANCING
will carry over into this mode.
Setting the Controls
As you adjust any of the controls, notice that the values on the bottom-right of the
display indicate the settings of the value you are changing.
If you are new to metal detecting, start with the GAIN at a low enough setting that you do not
hear any sounds when the searchcoil is sweeping across the ground, with no metal present.
Start with GAIN at the 12:00 position, or less.
In this mode, Gain refers to the detector’s sensitivity. The higher the setting, the deeper
objects can be found, and the more sensitive the detector is to very small metal objects.
The right knob is not used in the Discrimination Mode.
Click the right knob 100% counterclockwise.
If you turn the knob to the right, you will leave Discrimination Mode, entering All Metal Mode.
The Menu is located on the right side of the screen. During Discrimination
operation the Menu is inactive; during All Metal operation, Menu is not available.
to select a Menu option.
to modify the setting of the selected Menu option.
change the menu settings. When the menu is not visible,
change the DISC setting; it is not necessary to access the menu to
change DISC during operation.
Menu options are:
Available setting from 0 to 5. This option controls the brightness of the
display backlight. When the backlight is on,
is illuminated. In daylight,
the backlight can be turned on but will not be visible, draining the batteries.
So be sure
is not illuminated if backlight illumination is not required.
Operating in Discrimination Mode continued on next page
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 18
to adjust the volume setting when the VOLUME menu
option is highlighted. The default volume setting is 7.
to increase speaker volume. Maximum volume is at setting 20.
to lower speaker volume. The minimum volume setting is 0, no sound.
With volume set to 0, the Target-ID and Depth Bar Graph will function as
normal, but the detector will not emit a sound when targets are detected.
The overload volume signal will always sound off in the event of signal
overload, even with the volume set to 0.
Because the F19™ is so sensitive to even the smallest iron targets, the
detector incorporates FeTone™, Adjustable Iron Audio, a feature to reduce
the volume of iron targets to minimize user fatigue.
Volume settings 10 - 20 are available to control the volume level of iron
As you increase volume from 10 to 20, iron-volume changes from silent
to maximum. Note that, depending on the V-Br EAK® setting, iron targets
may induce V.C.O. tones; in this case, the V.C.O. tones in the iron range
(ID 1 - 39) will also have the same reduced volume.
At each of the 10 - 20 volume settings, nonferrous target response is
maximum volume.
Volume control applies only to motion target detection.
Volume changes do not affect Pinpoint volume.
Table describes ferrous and nonferrous volume at each setting
Setting Memory:
When detector is powered OFF settings are saved, except for the ground setting and backlight
When detector powers ON, ground is preset to 82.9 and backlight is always OFF.
How to preset to factory default settings (if desired).
• Power detector OFF.
• Set right knob to DISC.
• Press-and-hold
• Turn ON while holding
• The menu options will flash.
• r elease
; detector turns on and all settings are restored to the factory defaults.
Operating in Discrimination Mode continued on next page
What is Ground Balancing?
Why do I need to Ground Balance?
All soils contain minerals. Signals from ground minerals are
often tens or hundreds of times stronger than a buried metal object.
The magnetism of iron minerals, found in nearly all soils, causes one
type of interfering signal. Dissolved mineral salts, found in some soils
are electrically conductive, causing another type of interfering signal.
The mathematical term for describing these differences is Phase.
Phase varies with the types of minerals present in the
Ground Balancing is the process by which the metal
detector cancels the unwanted signals coming from the
ground minerals while still detecting the signals from
buried metal objects. This is accomplished by
matching the detector’s ground balance setting to
the phase of the ground signal.
Pumping coil
to ground
balance with
When the detector is calibrated to the soil, the
result will be deeper target detection, quieter
operation, and more accurate target identification.
How to Ground Balance your detector:
Ground Balancing procedure with the Ground Grab® COMPUTEr IZED Gr OUND
BALANCING (GG) touchpad.
1. Turn the detector on and set GAIN at the 12:00 position.
2. Click on the right knob to the ALL METAL Mode.
3. r otate the THr ESHOLD control knob to the point where you hear a slight
background hum.
4. Sweep searchcoil across the ground to find a clear patch of ground with no
metal present.
5. Press and hold the Ground Grab® COMPUTEr IZED Gr OUND BALANCING
(GG) touch pad, and pump searchcoil over the clean ground. See illustration
Pump searchcoil from within 1” of ground to 6”- 8” above ground.
6. When the GND PHASE settles down to only 1 or 2 numbers in variation,
release the GND Gr AB button while still pumping the searchcoil. Note that
the audio response to the ground changed and “Evened Out” when you
released the button. Also note that the GND BAL value changed. After
balancing, you can hunt in ALL METAL... or return to Disc Mode.
The most accurate GND PHASE value is the value displayed when “pumping” the
searchcoil over the ground in an area free of metal.
Ground Balancing continued on next page
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 19
When a target is detected, the rectangular segments representing the target
category are illuminated.
V-Break (Change audio for certain targets)
V-Break is a feature that allows the user to change the audio response of
certain targets. V-Break allows the user to program the detector so that any
target with an ID in the range of 0 - 80 can induce a LOW tone.
Here is an example of one possible discrimination setting:
DISC = 20
V-Br EAK = 50
NOTCH not set
Values from 21 to 50
will induce a LOW tone
Values from 51 to 99
will induce V.C.O. tones
The user sets V-Break to a desired setting (e.g. 42).
Every target with ID less than or equal to 42 induces a low tone.
The audio response of targets with IDs greater than 42 are not changed.VBreak can be set only for Target-IDs that have not previously been rejected
using the discrimination or notch functions.
Notch Width
As you press
when adjusting the Notch Width setting, the blank
area you see across the Conductivity Arc represents targets that will not be
detected. This blank area is the “notch-window.”
Values less
than 21 will
This value
and lower
will not be
This discrimination interface for the F19™ was designed especially for relichunting.
r elic hunters want control over what sizes of iron are detected, and also control
over which targets are detected with a low-tone. Target values of 39 or less are
Suggestion: Try changing the
settings, watch the screen, and
pass objects over the searchcoil at
each setting. It will quickly become
obvious how these controls work.
Notch Width allows you to set the size (or width) of this notch-window, which
can be used to “notch out” or “notch in” targets from detection; the
maximum width of the notch-window is 20.
After setting the width of the notch-window, it can be moved around using
NOTCH. The setting you adjust corresponds to the left-most edge of the
Available settings from 0-80. All targets with ID's less than or equal to the
Disc setting are eliminated from detection. For example, if Disc is set to 39,
all targets with an ID of 39 or less will not be detected. By design, the
detector does not allow highly conductive targets (like silver) to be
discriminated out.
to eliminate unwanted metals from detection.
Each time you press
the Disc value at the bottom-right of the display will
increment by one.
to increase the Discrimination level rapidly.
See the Target Identification section of the manual for a detailed description of
this function.
Sections of the arc with no indication represent metals completely eliminated
from detection.
to detect metals which were previously eliminated from
Operating in Discrimination Mode continued on next page
F19-MANUAL-printer_F19 MANUAL-printer 2/10/15 3:16 PM Page 20
Unwanted Noise
r ead 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.
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.
r elative 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.
Each time a target is detected, bars will illuminate on the bottom left showing
the strength of the target’s signal.
If all 7 bars illuminate, the target signal is strong.
This may be a large metal object.
Or it may be a coin-sized metal object close to the surface.
If only a few bars illuminate, the target signal is weak.
This may be a deeply buried object, even a big one.
Or it may be a very, very small metal object, close to the surface.
The depth of a coin-sized object can be confirmed using Pinpoint.
In Discrimination Mode, when menu is not displayed, pressing
change the discrimination setting.
As the level of discrimination changes, the target segments along the arc on the
screen will be displayed in one of two states:
1. Blank (no segments displayed)
2. Black (segments are solid black)
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.
The segments along the arc will remain illuminated in this state as you are
. This displays your chosen target discrimination parameter.
At any time during operation, you can view the discrimination settings in one of
two ways:
1. On the bottom-right of the screen the DISC value is always illuminated.
All Target-IDs less than or equal to the value displayed will not be
2. Whenever you press
, the arc will illuminate and show your
current detection parameters.
The first press of
will change the discrimination level by one
Discrimination Control continued on next page
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