Fisher | F4 | Users Manual | Fisher F4 Users Manual

Fisher F4 Users Manual
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 1
OPERATING
MANUAL
LINE
A
K
AL
LY
Use ries ON
e
Batt
MF4B
Rev.5
040215
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TABLE OF CONTENTS
NOTES
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Quick-Start Demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-11
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Auto Tune . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Discrimination Control . . . . . . . . . . . . . . . . . . . . . . . . . .9
Pinpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Notch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Ground Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
Quick Ground Balancing . . . . . . . . . . . . . . . . . . . . . . .13
4-Tone Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Depth and Target Display . . . . . . . . . . . . . . . . . . . . . . . .15-16
Target Readout Table . . . . . . . . . . . . . . . . . . . . . . . . .16
DD Coil Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Bottle Cap Discrimination . . . . . . . . . . . . . . . . . . . . . .17
Sweet Spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Sensitivity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Electromagnetic Interference . . . . . . . . . . . . . . . . . . .18
Severe Ground Conditions . . . . . . . . . . . . . . . . . . . . .18
Search Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Target Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Pinpointing with motion modes . . . . . . . . . . . . . . . . . .19
Target Pinpointing (No motion) . . . . . . . . . . . . . . . . . . . . . . .20
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Treasure Hunter’s Code of Ethics . . . . . . . . . . . . . . . . . . . . .21
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Page
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2
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NOTES
TERMINOLOGY
The following terms are used throughout the manual, and are standard
terminology among treasure hunters.
ELIMINATION
Reference to a metal being "eliminated" means that the detector will not emit
a tone, nor light up an indicator, when a specified object passes through the
searchcoil’s detection field.
DISCRIMINATION
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 essential feature of professional metal detectors.
Discrimination allows the user to ignore trash and other undesirable objects.
RELIC
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
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.
FERROUS
Metals which are made of, or contain, iron.
PINPOINTING
Pinpointing is the process of finding the exact location of a buried object. Longburied metals can appear to the eye exactly like the surrounding soil, and can
therefore be very hard to isolate from the soil.
PULL-TABS
Discarded pull-tabs from beverage containers are an especially
bothersome trash item for treasure hunters. They come in many different
shapes and sizes. Pull-tabs can be eliminated from detection, but some
other valuable objects can have a magnetic signature similar to pull-tabs,
and will also be eliminated when discriminating out pull-tabs.
GROUND BALANCE
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. The Gold Bug incorporates proprietary circuitry and programming to
eliminate false signals from severe ground conditions.
22
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ASSEMBLY
1
●
2
●
3
●
Caution: Forcing in MIDDLE STEM with CAM LOCK raised may form a burr on
camlock. If this happens, remove burr with knife to allow insertion.
•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
Position detector upright.
Rotate the LOCKING COLLAR fully in the
counterclockwise direction.
Insert your finger inside the tube and make sure the
INTERNAL CAM LOCK is flush with the inside of the tube.
LOCKING 2
COLLAR
Armrest
INTERNAL 3
CAM LOCK
●5
●
S-ROD
●
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.
S-Rod
SILVER BUTTON
MIDDLE 4
STEM
●
MIDDLE STEM
4
●
S-ROD
Hand-grip
Insert the MIDDLE STEM into the
S-ROD, with the SILVER BUTTON
pointed upward
●4
5 Rotate the MIDDLE STEM until the
SILVER BUTTON locates in the hole.
6 Twist the LOCKING COLLAR fully in the clockwise
Battery
direction until it locks.
Compartment
(back side)
7 Repeat this process on the LOWER STEM.
8 Using the BOLT and KNURLED KNOB, attach
Cable
the SEARCHCOIL to the LOWER STEM.
Plug
Locking
9 Adjust the LOWER STEM to a length that lets you
Collar
maintain a comfortable upright posture, with your arm
Search
Coil
relaxed at your side, and the SEARCHCOIL parallel to the
Cable
ground in front of you.
10 Wind the CABLE securely around the STEMS, leaving slack at
the bottom.
●
●
●
●
●
●
11
●
12
●
Headphone
Jack
5-YEAR LIMITED WARRANTY
Register your warranty on-line for a chance to win a
FREE DETECTOR.
For details, visit www.fisherlab.com
The F4 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.
Middle
Stem
Locking
Collar
Proof of Purchase is required to make a claim under this warranty.
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 consumer.
To return your detector for service, please first contact Fisher Labs for a Return
Authorization (RA) Number. Reference the RA number on your package and return
the detector within 15 days of calling to:
*
Connect CABLE PLUG to housing.
Do not twist the Cable or Plug. Turn Locking Ring only. Use
minimal finger pressure to start the threads. Do not crossthread. When the Locking Ring is fully engaged over the
threaded connector, give it a firm turn to make sure that it
is very tight. When the Locking Ring is fully engaged over the
threaded connector, it may not cover all of the threads.
1465 Henry Brennan Dr.
El Paso, TX 79936
Phone: 915-225-0333 ext.118
Knurled
Knob
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.
Tighten both LOCKING
COLLARS.
NOTE TO CUSTOMERS OUTSIDE THE U.S.A.
This warranty may vary in other countries, check with your distributor for details.
Warranty does not cover shipping costs.
Armrest Adjustment
If you wish to change the position of
the armrest, remove the screw and
move the armrest to one of the
alternate hole locations.
Biaxial
Searchcoil
* Note: Very tall users can purchase the optional Extended Lower Stem (TUBE5X), for extended reach.
4
TREASURE HUNTER’S CODE OF ETHICS:
Copyright© 2015
All rights reserved, including the right to reproduce this book, or parts thereof, in any form.
®
Fisher is a registered trademark of Fisher Research Labs
www.fisherlab.com
Made in the USA from USA and imported parts.
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TARGET PINPOINTING (no-motion PINPOINT Mode)
BATTERIES
After you have identified a target using a motion mode of detection, press
the PINPOINT pad 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 excavation.
Two 9-Volt batteries are
supplied with the F2.
Pinpoint (in no-motion mode) as follows:
1. Position the searchcoil just barely off the ground, and to the side of the
target.
2. Press PINPOINT pad and raise the searchcoil about 2 inches. Lifting the
searchcoil away from the ground makes the ground signal go negative,
so the machine is silent.
3. Now move the searchcoil slowly across the target, and 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 center.
2. Press PINPOINT pad again.
3. Repeat this narrowing procedure to narrow the field of
detection further.
Note: Depth indication is less accurate after
narrowing.
COIL DRIFT
If you plan to use the PINPOINT Mode for continuous
searching, 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; press PINPOINT to retune.
Temperature change will cause the coil
to drift in point mode.
If the detector moves from a cooler
to a warmer environment, the
detector may emit a constant
tone until the temperature
stabilizes; if so, retune.
If the detector moves
from a warmer to a
cooler environment, the
detector may lose
sensitivity (remaining quiet);
if so, retune.
20
The batteries have been inserted
backwards in the compartment
for storage during transportation.
Please remove batteries, turn them
around, and install correctly.
Use ALKALINE batteries only.
DO NOT MI X OLD AND NEW
BATTERIES.
1 Remove the battery cover by
l
disengaging the clip at the back.
To install the batteries:
Do not hinge door upward; pull straight
back
2 Align the polarity of the batteries
l
correctly, with the positive "+" toward the coil plug connection, as
3 Insert (2) 9-Volt ALKALINE batteries, with the contacts pointed inward, and
l
press down on the back of the batteries to snap them into place.
indicated by the + indicator on the housing.
Some brands of batteries will require moderate force to clear the
retaining tabs.
4 Replace the battery door.
l
Most metal detector problems are due to improperly installed batteries, or
the use of non-alkaline or discharged batteries. If the detector does not turn
on, please check the batteries.
BATTERY DISPOSAL & RECYCLING
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.
USING HEADPHONES
Using headphones (not included) improves battery
life, and prevents the sounds from annoying
bystanders.
It also allows you to hear subtle changes in the sound
more clearly, particularly if searching in a noisy
location. 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.
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QUICK-START DEMONSTRATION
I. Supplies Needed
• A Nail
• A Pull-Tab from a beverage can
• A Nickel
• A Quarter
• A Zinc Penny (dated after 1982)
II. 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 coil
off the ground).
b. Keep the searchcoil away
from walls, floors, and
metal objects.
c. Remove watches, rings
and other jewelry or metal objects from hands and wrists.
d. Turn off appliances or lights that cause electromagnetic interference.
e. Pivot the searchcoil back toward the detector body.
III. Power Up
Press the ON/OFF touch pad.
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.
IV. Wave each Object over the
Searchcoil
a.Notice a different tone for
each object.
Low Tone:
Nail
Low Mid Tone: Pull-Tab
Medium Tone: Zinc Penny
High Tone:
Quarter
b.Motion is required. Objects
must be in motion over the
searchcoil to be detected.
SEARCH TECHNIQUES (in DISC Mode)
Target Verification
After detecting a target, do the
following:
1. Walk around the target in a circle.
2. While circling the target, continue
sweeping the searchcoil across
the target.
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 identification.
If the tone or Target-ID
changes as you circle the target,
you may have multiple targets or
an irregularly shaped object.
If the tone completely
disappears at different angles, the
target may be trash or a low-value
metal.
If you are new to the hobby,
dig all targets. With practice in the
field, you will soon identify audible
certain types of metal objects.
WRONG
CORRECT
COIL MOVEMENT
When swing ing the coil, be
careful to keep it level with the
ground about 1/2 inch from the
surface. Never swing the coil like
a pendulum.
and visual target feedback with
Pinpointing process in motion modes:
1.
2.
3.
4.
5.
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 coil over same area, at 90° to 1st sweep pattern.
This pinpoints the target location with an “X”
V. Press the DISC touch pad
The detector will beep and 2
“R”’s will appear under the
iron indicators.
6
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SENSITIVITY ADJUSTMENT
QUICK-START DEMONSTRATION
ELECTROMAGNETIC INTERFERENCE
VI. Wave the Nail over the Searchcoil
a. The Nail will not be detected.
b. The Nail has been "Discriminated Out."
Use the Sensitivity Control is to eliminate
Electromagnetic Interference (EMI).
The F4 metal detector is an extremely sensitive
device; the searchcoil creates its own magnetic
field and acts like an antenna. If your detector
beeps erratically when the searchcoil is motionless,
the unit is probably detecting another
electromagnetic field.
Common sources of EMI are electric power lines, both suspended and buried,
motors, and household appliances like computers and microwave ovens. Some
indoor electronic devices, such as dimmer switches used on household lighting,
produce severe EMI and can cause the detector to beep erratically. Other metal
detectors also produce their own electromagnetic fields; so if detecting with a friend,
keep two metal detectors at least 20 feet apart.
If the detector beeps erratically, REDUCE THE SENSITIVITY by pressing the
Sensitivity - Pad on the left of the control panel.
In most urban environments, you should be able to search without chatter from
interference at the default sensitivity setting (default setting is the sensitivity level at
power-up, 4 bars), or at one level reduced from default. At maximum sensitivity, the
F4 will “chatter” in proximity to underground or overhead power lines, or to indoor or
outdoor electrical devices. In fact, if you notice rapid chatter with the searchcoil near
the ground, you may be able to trace the approximate location of the underground
power lines by following the chatter.
To manage chatter, which is most likely from electrical interference:
1. REDUCE the SENSITIVITY until the chatter stops.
2. Try sweeping it over the ground.
If the F4 chatters while held still, or held up in the air, it may be much quieter
when sweeping over the ground.
3. Operate in AUTOTUNE Mode
Interference is much more tolerable in this mode, even at high sensitivity.
SEVERE GROUND CONDITIONS
A secondary use for the Sensitivity Control is to reduce false detection signals caused
by severe ground conditions. While the detector contains circuitry to eliminate the
signals caused by most naturally occurring ground minerals, 100% of all ground
conditions cannot be anticipated. Highly magnetic soils found in mountainous and
gold-prospecting locations can cause the detector to emit tones when metal objects
are not present. High saline content soils and sands can sometimes cause the
detector to beep when no metal target is present.
(continued)
VII. Press the “DISCRIMINATION
+” touch pad 3 times.
Five “R”s are now displayed.
VIII. Wave all objects over the
Searchcoil
The Nail and Pull-Tab will not
be detected.
The other objects will be
detected with their own
distinctive tones.
IX. Press the NOTCH touch pad.
A flashing “s ” will appear under the IRON-1 segment.
X. Press the DISCRIMINATION
+ touch pad 3 times.
The flashing “s ” will move to
the 5¢ segment.
XI. Press the NOTCH touch pad
again
The “R” will disappear under 5¢
segment.
XII. Wave the nickel over the
searchcoil.
The nickel is detected.
XIII. Wave the penny over
the searchcoil.
XIV.Press the NOTCH touch pad
twice.
The arrow under the 1¢ segment will flash & then the “R” will illuminate.
XV. Wave the penny over the searchcoil again.
The penny (the most recently detected item) is eliminated from
detection.
XVI. Press the PINPOINT touch pad.
Hold one of the metal objects motionless over the searchcoil.
• All Metal objects are now detected.
• One monotone sound indicates the presence of any type of metal.
• A 2-digit numerical display indicates approximate target depth, in inches.
If the detector emits false, non-repeatable, signals, REDUCE THE SENSITIVITY.
18
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CONTROL PANEL
DD COIL CHARACTERISTICS
The operating controls are as follows:
A DD coil is superior to a concentric coil, but sometimes requires a different
sweep technique.
Advantages are
1. Better target separation
2. Superior performance in highly mineralized ground
3. Broader Sweep- cover more ground with each sweep
SENSITIVITY + AND –
These controls change the detector’s sensitivity; higher
settings enable detection of deeper targets. At powerup, the detector is pre-set to 75% of maximum
sensitivity. At minimum, the sensitivity is 35% of
maximum. With each press of the + or – touch pads,
the sensitivity level is displayed on the bar graph on the
left of the display. Upon reaching the minimum or
maximum sensitivity setting, the detector will beep
twice.
While higher levels of sensitivity enable detection of deeper targets, operation at
high levels of sensitivity make the detector more susceptible to electromagnetic
interference. Higher sensitivity settings can also lead to false signals in difficult
ground conditions. Use lower sensitivity settings to suppress interference or false
signals from soil minerals when necessary.
If the detector “Chatters”, reduce sensitivity.
AUTO TUNE (All Metal)
Press this pad and “ALL METAL” appears on the display
This mode is a ground-balanced All Metal motion
search mode. This mode offers the maximum
amount of sensitivity under most ground conditions.
The searchcoil must be in motion to detect metal.
One monotone sound is emitted. No discrimination
or target identification is possible in this mode.
Use the Sensitivity or Threshold controls to
change the sensitivity or background hum. Maximum sensitivity to buried
metal objects is achieved with a slightly audible background hum.
To achieve an audible background hum:
1. Press AUTO TUNE pad to enter this mode.
2. Press Sensitivity + or pads until you reach a desired setting.
This sensitivity setting may be the highest “quiet” setting, or you may hear
a faint background hum.
3. Press Threshold + or pad until you reach a comfortable volume level.
-
-
The Sensitivity control works like a course adjustment in this mode.
The Threshold control works like a fine adjustment in this mode.
If you experience multiple responses on a shallow target, you can raise the
coil, or narrow the sweep over known targets to only intersect the center
section of the coil.
BOTTLE CAPS
The disadvantage of the DD coil is its propensity to classify steel bottle caps as coins.
If you hear a high tone in DISC Mode and believe that it
is a coin, make sure it is not a bottle cap using the following method.
1. If a repeatable ID# around 68 to 72, then it
should be a dime or copper penny.
2. If not in the range of 68 to 72, then:
a. Sweep the back end of searchcoil over the
target. If tone changes from high to a low
tone, it is probably a bottle cap.
b. Sweep searchcoil fast across
target.
1. If tone and ID-value
drop, it is probably a
bottle cap.
2. If a bottle cap, the faster
you sweep, the lower
the tone.
Sweep back end
of searchcoil over
suspected bottle cap.
(Low Tone = Bottle Cap)
SWEET SPOT
The “center” of the DD-Coil is elongated (elliptical) from top to bottom of
the coil. With some practice you will find where the center of this ellipse
lies on your coil. Use this center point as a reference in pinpointing.
The AUTO TUNE Mode must be ground-balanced to eliminate interfering
signals from soil minerals. See the section on ground balancing for a
description of this procedure.
8
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DEPTH AND TARGET DISPLAY
CONTROL PANEL
Cu/10¢: Dimes and pre-1982 pennies will
register here. Older, pre-1982, pennies are
composed of copper, which has a metallic
signature similar to a dime. Most copper
coins will register here.
DISCRIMINATION (THRESHOLD) + AND –
Caution: The target indications are
visual references. Many other types of
metal can fall under any one of these
categories. While the F4 will eliminate or
indicate the presence of most common
trash items, it is impossible to accurately
classify ALL buried objects.
DEPTH INDICATOR:
The Depth Indicator is accurate for coinsized objects. It indicates the depth of
the target, in inches. Large and
irregularly-shaped objects will yield less
reliable depth readings
While holding the PinPoint touch pad, and
passing over a metal object “depth” will
appear next to the one-digit or two-digit
number in the middle of the screen.
TWO DIGIT TARGET INDICATOR
The Two-digit target indicator, in the middle
of the LCD display, 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 coil
passes over the target, depending upon the
angle of the object and the distance from
the coil.
As a starting point, refer to the table
below.
TARGET Readout
The table below lists some common
approximate target value equivalents.
With experience in the field, you will
recognize many types of metals by
their numeric value.
TYPICAL
VALUE
0-15
25-28
28-32
36-42
58-62
68-72
78-83
86-90
91-95
POSSIBLE
OBJECTS
Iron
Pull-Tab Tail (broken off)
Nickel
Pull-Tab (old type)
Zinc, Penny
Dime & Wheat Cent
Quarter
Half Dollar
Silver Dollar
(continued)
The function of this control depends upon the
operating mode you are in before you press these
touch pads.
AUTO TUNE
+ and – will change the threshold sensitivity of
the detector in this mode. This Threshold
control operates like a fine adjustment for
setting the sensitivity level and the volume of the
background audible hum. If you continue to
press +, you will cause the detector to make a
sound, or hum, when no metal is present.
Depending upon skill level and environment,
some users prefer to operate in AUTO TUNE with an audible hum active at
all times. At such a high “threshold,” faint signals from deeply buried or
very small objects will be more apparent to the user.
PINPOINT
Not applicable.
The + and – touch pads have no function in this mode.
DISC
+ and – will increase or decrease the level of discrimination. Each press
of the pads will cause an “R” to appear or
disappear on the display. When the “R”
appears, the corresponding target category will
be eliminated from detection. No audible tone
nor target-arrow will appear when the searchcoil
passes by an object in a category with an “R”
illuminated. A maximum of seven “R”s can be
displayed, eliminating objects up to the Zinc-1¢
category. The four right-most target categories
cannot be eliminated from detection.
NOTCH
When Notching-Out a target, the + and – pads will move a flashing arrow
to the target category selected for notching. This feature allows you to
discriminate items selectively across the target spectrum. While the
“discrimination” control eliminates all targets from
left to right, this control allows you to either add
back categories previously eliminated (changing
from “R” to “blank”) or to selectively eliminate
categories (changing from “blank” to “R”).
16
9
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CONTROL PANEL
(continued)
PINPOINT
This is a static search and static pinpointing mode; no
coil motion over the target is required to detect
metal. This mode is most effective in pinpointing the
exact location of small buried objects. The detection
sensitivity of this mode is controlled by the SENSITIVITY
+ or – touch pads. Discrimination (threshold) + / - has
no function. Reduced sensitivity, and thus a smaller
search field, can also be achieved by pressing the
PINPOINT pad while an object is in the coil’s detection
field. The greatest sensitivity to large, deeply-buried
objects is achieved with this mode.
If you plan to use PINPOINT as a continuous search
mode, the detector must be ground-balanced
before searching.
DISC
This control invokes motion target identification
search modes.
Successive presses of the DISC pad will toggle
back and forth between the:
1. All Metal Discrimination Mode: a motion mode
where all metal targets are detected
and the:
2. Discrimination Mode: a motion mode where
the user can selectively eliminate target
categories from detection.
When the detector powers up, it automatically enters ALL METAL
DISCRIMINATION Mode with no targets eliminated from detection.
Press DISC to enter discrimination mode.
In order to eliminate more targets from detection, press the
DISCRIMINATION + pad.
To reverse this target elimination, press the
DISCRIMINATION – pad; illuminated “R”s will disappear.
DEPTH AND TARGET DISPLAY
READING THE DISPLAY
The Liquid Crystal Display (LCD) shows the
PROBABLE identification of the targeted
metal, as well as the PROBABLE depth of the
target, in inches.
An arrow will illuminate under the target
category where an object is best
classified, and stay illuminated until
another target is identified.
The detector will normally register a
repeating,
unchanging
target
identification when a buried target has
been located and identified. If, upon
repeated passes over the same spot, the
target identification reads inconsistently,
the target is probably a trash item,
oxidized metal, or too deep to be
classified accurately. With practice, you
will learn to unearth only the more
repeatable signals.
The segment identifications are highly
accurate, when detecting the objects
described on the label. However, if you
register in a given category for an unknown
buried object, you could be detecting a
metallic object other than the object
described on the label, but with the same
metallic signature. Also, the greater the
distance between the target and the coil,
the less accurate the target identification.
GOLD TARGETS Gold objects will register on
the left side of the LCD scale. Gold will
register depending upon its size. The smaller
the gold object, the further to the left it will
register.
Medium-sized gold items will register
under PT or S-cap.
Large gold items will register under Scap or Zinc.
SILVER TARGETS: Silver objects will normally
register to the right of the scale, under 10¢,
25¢, 50¢, or $1, depending on the size of
the object. The larger the object, the farther
to the right it will register.
IRON: Ferrous objects will register on the
far-left side of the target identification
scale. 1, or 2 indicates the relative size of
iron objects. Small nails, for instance, will
usually illuminate the Iron-1 arrow whereas
large structural ferrous objects will usually
illuminate the Iron-2 arrow.
Objects in this category could be worthless
scrap, or a more valuable iron relic.
5¢/PT: Nickels and most newer pulltabs(those that stay attached to the can)
will register here.
PT(pull-tabs):
Pull-tabs from older
beverage cans will register here. Few
newer pull-tabs will also register here.
Many gold rings will also register here.
SC (Screw Caps): Screw caps from glass
bottles will register here. Large gold rings,
like a class ring, could also register here.
Some non-U.S. coins will also register here.
ZINC/1¢: Newer pennies (post-1982) will
register here. Many non-U.S. coins of
recent vintage will also register here.
Gold flakes will register under Iron-1
Small gold items will register under Iron
or 5¢/PT.
10
15
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 11
CONTROL PANEL
4-TONE AUDIO SYSTEM
While the LCD (Liquid Crystal Display) is very accurate in identifying buried
objects, the user in the field does not always maintain the display screen in
his field of vision. Therefore, we have incorporated an audio feedback
mechanism to alert the user to the nature of buried objects. This audio
feedback system first alerts the user to the presence and classification of
objects, whose nature and location can be confirmed using the LCD
display.
(continued)
As you sweep the searchcoil over a metal object, a numeric target
identification will appear in the center of the display. At the same time, the
bar graph on the left of the display will indicate the target depth, in inches.
See the scale printed on label to left of the bar graph. This scale is calibrated
to coin-sized objects. If the target is larger than a coin, it can be used to
approximate relative target depth.
NOTCH
The 4-tone audio Target Identification system functions only in the motion
modes of operation. The detector must be in the DISCRIMINATION Mode, as
indicated on the display. In PINPOINT or AUTOTUNE Modes, the detector will
emit only a monotone sound.
This control allows you to selectively include or exclude target categories
from detection. The NOTCH control can be invoked from any search mode.
After selecting the categories to notch-in or notch-out, the detector will
always return to the motion discrimination mode.
The detector can sound four different tones, depending on the object detected.
Notching functions in two ways, manual or automatic.
LOW TONE
Ferrous objects, such as iron and steel, will induce a low tone.
The smallest gold objects can also induce a low tone.
LOW-MID
Pull-Tabs, nickels & smaller gold
MEDIUM TONE
Newer pennies (post-1982), larger gold objects, zinc, and small brass
objects, will induce medium tones. Many recent vintage non-U.S.
currencies will induce medium tones.
HIGH TONE
Silver and copper coins, larger brass objects and older pennies (pre1982), will induce high tones. Quarters, dimes and other precious
coins fall into this category.
MANUAL NOTCH
If no target arrows are visible, pressing the NOTCH pad will display an “R”
under all target categories currently eliminated and the “s ” under Iron1
will flash.
Use the Discrimination + or – pads to move the position of the flashing
“s ”. Pressing NOTCH a 2nd time will change the state of the “R” under
the flashing “s ”; if the “R” was previously illuminated, it will disappear.
Conversely, if the “R” was not illuminated, a 2nd press of the NOTCH pad
will illuminate the “R”, causing this category to be eliminated from
detection.
Practice by pressing the NOTCH pad in conjunction with the
Discrimination + and – pads;
their function will quickly
become obvious.
AUTOMATIC NOTCH
LOW TONE
LOW-MID TONE
Nails, Iron Objects,
& Smallest Gold Objects
Pull Tabs, Nickels,
& Smaller Gold
MEDIUM TONE
Zinc Pennies (Post 1982),
Larger Gold Objects
HIGH TONE
Copper, Silver & Brass
Copper Pennies (Pre 1982)
Audio Target Identification (ATI) classifies metals into four categories.
14
If a target has just been
detected and a target arrow is
visible, pressing NOTCH will
immediately illuminate a
flashing “s ” under this
category.
Press NOTCH a 2nd time to
eliminate that target category
from detection.
This Automatic Notch feature is
a convenient way to quickly eliminate the most recently detected target
from future detection.
11
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 12
GROUND BALANCING
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 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. Dissolved mineral salts, found in some soils, are electrically
conductive, causing another type of interfering signal.
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 calibrating the
detector’s phase response, eliminating the signals from ground minerals.
When the detector is calibrated to the soil, the result will be deeper target
detection and quieter operation.
How to Ground Balance your detector: (Preferred method)
Find a patch of ground free of metal
1. Rotate the Ground-Balance KNOB 100% clockwise to the Preset
position.
2. Press the AUTO TUNE pad. ALL METAL appears on the display.
3. Press Sensitivity + pad several times to reach the highest “quiet” setting
or a setting with a faint background hum.
4. Press Threshold + or – to adjust the audible hum to a comfortable
level.
5. Physically pump the searchcoil
and detector up and down
over the ground.
Lift the searchcoil about 6
inches above the ground and
lower it to within 1 inch of the
ground, about once or twice a
second.
6. While pumping the searchcoil
over the ground in this fashion,
slowly rotate the KNOB
counterclockwise.
12
GROUND BALANCING
(continued)
7. Notice that the position of the KNOB affects the
sound relative to the coil’s direction:
a. If you hear a louder sound as the searchcoil
is lowered toward the ground, we call this
positive response.
b. If you hear a louder sound as the searchcoil
is lifted away from the ground, we call this
negative response.
8. Rotate the knob both clockwise and
counterclockwise while pumping
the coil and notice the KNOB
position where the sound
changes from negative response
to positive response.
9. Set the KNOB at the position where
you achieve a slight positive
response.
i.e. the sound is slightly
louder as the coil is
lowered toward the
ground.
CAUTION: cannot ground balance over a metal object.
Alternate Quick Ground Balancing Method
You may also use the following, simpler method, to ground balance. While
not as accurate as the coil-pumping method in AutoTune, it yields an
approximate ground balance setting.
Find a patch of ground free of metal
1)
2)
3)
4)
5)
6)
Set the ground-balance knob at the pre-set position, 100% clockwise.
Position the searchcoil about 6” over the ground.
Press PINPOINT button
Lower searchcoil to within 1” of the ground. Sound will get louder.
Rotate knob slowly counterclockwise until detector is just silent.
Rotate knob back slightly clockwise until you hear a low volume sound.
At this low-volume setting, the detector is approximately ground
balanced.
13
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 12
GROUND BALANCING
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 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. Dissolved mineral salts, found in some soils, are electrically
conductive, causing another type of interfering signal.
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 calibrating the
detector’s phase response, eliminating the signals from ground minerals.
When the detector is calibrated to the soil, the result will be deeper target
detection and quieter operation.
How to Ground Balance your detector: (Preferred method)
Find a patch of ground free of metal
1. Rotate the Ground-Balance KNOB 100% clockwise to the Preset
position.
2. Press the AUTO TUNE pad. ALL METAL appears on the display.
3. Press Sensitivity + pad several times to reach the highest “quiet” setting
or a setting with a faint background hum.
4. Press Threshold + or – to adjust the audible hum to a comfortable
level.
5. Physically pump the searchcoil
and detector up and down
over the ground.
Lift the searchcoil about 6
inches above the ground and
lower it to within 1 inch of the
ground, about once or twice a
second.
6. While pumping the searchcoil
over the ground in this fashion,
slowly rotate the KNOB
counterclockwise.
12
GROUND BALANCING
(continued)
7. Notice that the position of the KNOB affects the
sound relative to the coil’s direction:
a. If you hear a louder sound as the searchcoil
is lowered toward the ground, we call this
positive response.
b. If you hear a louder sound as the searchcoil
is lifted away from the ground, we call this
negative response.
8. Rotate the knob both clockwise and
counterclockwise while pumping
the coil and notice the KNOB
position where the sound
changes from negative response
to positive response.
9. Set the KNOB at the position where
you achieve a slight positive
response.
i.e. the sound is slightly
louder as the coil is
lowered toward the
ground.
CAUTION: cannot ground balance over a metal object.
Alternate Quick Ground Balancing Method
You may also use the following, simpler method, to ground balance. While
not as accurate as the coil-pumping method in AutoTune, it yields an
approximate ground balance setting.
Find a patch of ground free of metal
1)
2)
3)
4)
5)
6)
Set the ground-balance knob at the pre-set position, 100% clockwise.
Position the searchcoil about 6” over the ground.
Press PINPOINT button
Lower searchcoil to within 1” of the ground. Sound will get louder.
Rotate knob slowly counterclockwise until detector is just silent.
Rotate knob back slightly clockwise until you hear a low volume sound.
At this low-volume setting, the detector is approximately ground
balanced.
13
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 11
CONTROL PANEL
4-TONE AUDIO SYSTEM
While the LCD (Liquid Crystal Display) is very accurate in identifying buried
objects, the user in the field does not always maintain the display screen in
his field of vision. Therefore, we have incorporated an audio feedback
mechanism to alert the user to the nature of buried objects. This audio
feedback system first alerts the user to the presence and classification of
objects, whose nature and location can be confirmed using the LCD
display.
(continued)
As you sweep the searchcoil over a metal object, a numeric target
identification will appear in the center of the display. At the same time, the
bar graph on the left of the display will indicate the target depth, in inches.
See the scale printed on label to left of the bar graph. This scale is calibrated
to coin-sized objects. If the target is larger than a coin, it can be used to
approximate relative target depth.
NOTCH
The 4-tone audio Target Identification system functions only in the motion
modes of operation. The detector must be in the DISCRIMINATION Mode, as
indicated on the display. In PINPOINT or AUTOTUNE Modes, the detector will
emit only a monotone sound.
This control allows you to selectively include or exclude target categories
from detection. The NOTCH control can be invoked from any search mode.
After selecting the categories to notch-in or notch-out, the detector will
always return to the motion discrimination mode.
The detector can sound four different tones, depending on the object detected.
Notching functions in two ways, manual or automatic.
LOW TONE
Ferrous objects, such as iron and steel, will induce a low tone.
The smallest gold objects can also induce a low tone.
LOW-MID
Pull-Tabs, nickels & smaller gold
MEDIUM TONE
Newer pennies (post-1982), larger gold objects, zinc, and small brass
objects, will induce medium tones. Many recent vintage non-U.S.
currencies will induce medium tones.
HIGH TONE
Silver and copper coins, larger brass objects and older pennies (pre1982), will induce high tones. Quarters, dimes and other precious
coins fall into this category.
MANUAL NOTCH
If no target arrows are visible, pressing the NOTCH pad will display an “R”
under all target categories currently eliminated and the “s ” under Iron1
will flash.
Use the Discrimination + or – pads to move the position of the flashing
“s ”. Pressing NOTCH a 2nd time will change the state of the “R” under
the flashing “s ”; if the “R” was previously illuminated, it will disappear.
Conversely, if the “R” was not illuminated, a 2nd press of the NOTCH pad
will illuminate the “R”, causing this category to be eliminated from
detection.
Practice by pressing the NOTCH pad in conjunction with the
Discrimination + and – pads;
their function will quickly
become obvious.
AUTOMATIC NOTCH
LOW TONE
LOW-MID TONE
Nails, Iron Objects,
& Smallest Gold Objects
Pull Tabs, Nickels,
& Smaller Gold
MEDIUM TONE
Zinc Pennies (Post 1982),
Larger Gold Objects
HIGH TONE
Copper, Silver & Brass
Copper Pennies (Pre 1982)
Audio Target Identification (ATI) classifies metals into four categories.
14
If a target has just been
detected and a target arrow is
visible, pressing NOTCH will
immediately illuminate a
flashing “s ” under this
category.
Press NOTCH a 2nd time to
eliminate that target category
from detection.
This Automatic Notch feature is
a convenient way to quickly eliminate the most recently detected target
from future detection.
11
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 10
CONTROL PANEL
(continued)
PINPOINT
This is a static search and static pinpointing mode; no
coil motion over the target is required to detect
metal. This mode is most effective in pinpointing the
exact location of small buried objects. The detection
sensitivity of this mode is controlled by the SENSITIVITY
+ or – touch pads. Discrimination (threshold) + / - has
no function. Reduced sensitivity, and thus a smaller
search field, can also be achieved by pressing the
PINPOINT pad while an object is in the coil’s detection
field. The greatest sensitivity to large, deeply-buried
objects is achieved with this mode.
If you plan to use PINPOINT as a continuous search
mode, the detector must be ground-balanced
before searching.
DISC
This control invokes motion target identification
search modes.
Successive presses of the DISC pad will toggle
back and forth between the:
1. All Metal Discrimination Mode: a motion mode
where all metal targets are detected
and the:
2. Discrimination Mode: a motion mode where
the user can selectively eliminate target
categories from detection.
When the detector powers up, it automatically enters ALL METAL
DISCRIMINATION Mode with no targets eliminated from detection.
Press DISC to enter discrimination mode.
In order to eliminate more targets from detection, press the
DISCRIMINATION + pad.
To reverse this target elimination, press the
DISCRIMINATION – pad; illuminated “R”s will disappear.
DEPTH AND TARGET DISPLAY
READING THE DISPLAY
The Liquid Crystal Display (LCD) shows the
PROBABLE identification of the targeted
metal, as well as the PROBABLE depth of the
target, in inches.
An arrow will illuminate under the target
category where an object is best
classified, and stay illuminated until
another target is identified.
The detector will normally register a
repeating,
unchanging
target
identification when a buried target has
been located and identified. If, upon
repeated passes over the same spot, the
target identification reads inconsistently,
the target is probably a trash item,
oxidized metal, or too deep to be
classified accurately. With practice, you
will learn to unearth only the more
repeatable signals.
The segment identifications are highly
accurate, when detecting the objects
described on the label. However, if you
register in a given category for an unknown
buried object, you could be detecting a
metallic object other than the object
described on the label, but with the same
metallic signature. Also, the greater the
distance between the target and the coil,
the less accurate the target identification.
GOLD TARGETS Gold objects will register on
the left side of the LCD scale. Gold will
register depending upon its size. The smaller
the gold object, the further to the left it will
register.
Medium-sized gold items will register
under PT or S-cap.
Large gold items will register under Scap or Zinc.
SILVER TARGETS: Silver objects will normally
register to the right of the scale, under 10¢,
25¢, 50¢, or $1, depending on the size of
the object. The larger the object, the farther
to the right it will register.
IRON: Ferrous objects will register on the
far-left side of the target identification
scale. 1, or 2 indicates the relative size of
iron objects. Small nails, for instance, will
usually illuminate the Iron-1 arrow whereas
large structural ferrous objects will usually
illuminate the Iron-2 arrow.
Objects in this category could be worthless
scrap, or a more valuable iron relic.
5¢/PT: Nickels and most newer pulltabs(those that stay attached to the can)
will register here.
PT(pull-tabs):
Pull-tabs from older
beverage cans will register here. Few
newer pull-tabs will also register here.
Many gold rings will also register here.
SC (Screw Caps): Screw caps from glass
bottles will register here. Large gold rings,
like a class ring, could also register here.
Some non-U.S. coins will also register here.
ZINC/1¢: Newer pennies (post-1982) will
register here. Many non-U.S. coins of
recent vintage will also register here.
Gold flakes will register under Iron-1
Small gold items will register under Iron
or 5¢/PT.
10
15
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 9
DEPTH AND TARGET DISPLAY
CONTROL PANEL
Cu/10¢: Dimes and pre-1982 pennies will
register here. Older, pre-1982, pennies are
composed of copper, which has a metallic
signature similar to a dime. Most copper
coins will register here.
DISCRIMINATION (THRESHOLD) + AND –
Caution: The target indications are
visual references. Many other types of
metal can fall under any one of these
categories. While the F4 will eliminate or
indicate the presence of most common
trash items, it is impossible to accurately
classify ALL buried objects.
DEPTH INDICATOR:
The Depth Indicator is accurate for coinsized objects. It indicates the depth of
the target, in inches. Large and
irregularly-shaped objects will yield less
reliable depth readings
While holding the PinPoint touch pad, and
passing over a metal object “depth” will
appear next to the one-digit or two-digit
number in the middle of the screen.
TWO DIGIT TARGET INDICATOR
The Two-digit target indicator, in the middle
of the LCD display, 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 coil
passes over the target, depending upon the
angle of the object and the distance from
the coil.
As a starting point, refer to the table
below.
TARGET Readout
The table below lists some common
approximate target value equivalents.
With experience in the field, you will
recognize many types of metals by
their numeric value.
TYPICAL
VALUE
0-15
25-28
28-32
36-42
58-62
68-72
78-83
86-90
91-95
POSSIBLE
OBJECTS
Iron
Pull-Tab Tail (broken off)
Nickel
Pull-Tab (old type)
Zinc, Penny
Dime & Wheat Cent
Quarter
Half Dollar
Silver Dollar
(continued)
The function of this control depends upon the
operating mode you are in before you press these
touch pads.
AUTO TUNE
+ and – will change the threshold sensitivity of
the detector in this mode. This Threshold
control operates like a fine adjustment for
setting the sensitivity level and the volume of the
background audible hum. If you continue to
press +, you will cause the detector to make a
sound, or hum, when no metal is present.
Depending upon skill level and environment,
some users prefer to operate in AUTO TUNE with an audible hum active at
all times. At such a high “threshold,” faint signals from deeply buried or
very small objects will be more apparent to the user.
PINPOINT
Not applicable.
The + and – touch pads have no function in this mode.
DISC
+ and – will increase or decrease the level of discrimination. Each press
of the pads will cause an “R” to appear or
disappear on the display. When the “R”
appears, the corresponding target category will
be eliminated from detection. No audible tone
nor target-arrow will appear when the searchcoil
passes by an object in a category with an “R”
illuminated. A maximum of seven “R”s can be
displayed, eliminating objects up to the Zinc-1¢
category. The four right-most target categories
cannot be eliminated from detection.
NOTCH
When Notching-Out a target, the + and – pads will move a flashing arrow
to the target category selected for notching. This feature allows you to
discriminate items selectively across the target spectrum. While the
“discrimination” control eliminates all targets from
left to right, this control allows you to either add
back categories previously eliminated (changing
from “R” to “blank”) or to selectively eliminate
categories (changing from “blank” to “R”).
16
9
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CONTROL PANEL
DD COIL CHARACTERISTICS
The operating controls are as follows:
A DD coil is superior to a concentric coil, but sometimes requires a different
sweep technique.
Advantages are
1. Better target separation
2. Superior performance in highly mineralized ground
3. Broader Sweep- cover more ground with each sweep
SENSITIVITY + AND –
These controls change the detector’s sensitivity; higher
settings enable detection of deeper targets. At powerup, the detector is pre-set to 75% of maximum
sensitivity. At minimum, the sensitivity is 35% of
maximum. With each press of the + or – touch pads,
the sensitivity level is displayed on the bar graph on the
left of the display. Upon reaching the minimum or
maximum sensitivity setting, the detector will beep
twice.
While higher levels of sensitivity enable detection of deeper targets, operation at
high levels of sensitivity make the detector more susceptible to electromagnetic
interference. Higher sensitivity settings can also lead to false signals in difficult
ground conditions. Use lower sensitivity settings to suppress interference or false
signals from soil minerals when necessary.
If the detector “Chatters”, reduce sensitivity.
AUTO TUNE (All Metal)
Press this pad and “ALL METAL” appears on the display
This mode is a ground-balanced All Metal motion
search mode. This mode offers the maximum
amount of sensitivity under most ground conditions.
The searchcoil must be in motion to detect metal.
One monotone sound is emitted. No discrimination
or target identification is possible in this mode.
Use the Sensitivity or Threshold controls to
change the sensitivity or background hum. Maximum sensitivity to buried
metal objects is achieved with a slightly audible background hum.
To achieve an audible background hum:
1. Press AUTO TUNE pad to enter this mode.
2. Press Sensitivity + or pads until you reach a desired setting.
This sensitivity setting may be the highest “quiet” setting, or you may hear
a faint background hum.
3. Press Threshold + or pad until you reach a comfortable volume level.
-
-
The Sensitivity control works like a course adjustment in this mode.
The Threshold control works like a fine adjustment in this mode.
If you experience multiple responses on a shallow target, you can raise the
coil, or narrow the sweep over known targets to only intersect the center
section of the coil.
BOTTLE CAPS
The disadvantage of the DD coil is its propensity to classify steel bottle caps as coins.
If you hear a high tone in DISC Mode and believe that it
is a coin, make sure it is not a bottle cap using the following method.
1. If a repeatable ID# around 68 to 72, then it
should be a dime or copper penny.
2. If not in the range of 68 to 72, then:
a. Sweep the back end of searchcoil over the
target. If tone changes from high to a low
tone, it is probably a bottle cap.
b. Sweep searchcoil fast across
target.
1. If tone and ID-value
drop, it is probably a
bottle cap.
2. If a bottle cap, the faster
you sweep, the lower
the tone.
Sweep back end
of searchcoil over
suspected bottle cap.
(Low Tone = Bottle Cap)
SWEET SPOT
The “center” of the DD-Coil is elongated (elliptical) from top to bottom of
the coil. With some practice you will find where the center of this ellipse
lies on your coil. Use this center point as a reference in pinpointing.
The AUTO TUNE Mode must be ground-balanced to eliminate interfering
signals from soil minerals. See the section on ground balancing for a
description of this procedure.
8
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SENSITIVITY ADJUSTMENT
QUICK-START DEMONSTRATION
ELECTROMAGNETIC INTERFERENCE
VI. Wave the Nail over the Searchcoil
a. The Nail will not be detected.
b. The Nail has been "Discriminated Out."
Use the Sensitivity Control is to eliminate
Electromagnetic Interference (EMI).
The F4 metal detector is an extremely sensitive
device; the searchcoil creates its own magnetic
field and acts like an antenna. If your detector
beeps erratically when the searchcoil is motionless,
the unit is probably detecting another
electromagnetic field.
Common sources of EMI are electric power lines, both suspended and buried,
motors, and household appliances like computers and microwave ovens. Some
indoor electronic devices, such as dimmer switches used on household lighting,
produce severe EMI and can cause the detector to beep erratically. Other metal
detectors also produce their own electromagnetic fields; so if detecting with a friend,
keep two metal detectors at least 20 feet apart.
If the detector beeps erratically, REDUCE THE SENSITIVITY by pressing the
Sensitivity - Pad on the left of the control panel.
In most urban environments, you should be able to search without chatter from
interference at the default sensitivity setting (default setting is the sensitivity level at
power-up, 4 bars), or at one level reduced from default. At maximum sensitivity, the
F4 will “chatter” in proximity to underground or overhead power lines, or to indoor or
outdoor electrical devices. In fact, if you notice rapid chatter with the searchcoil near
the ground, you may be able to trace the approximate location of the underground
power lines by following the chatter.
To manage chatter, which is most likely from electrical interference:
1. REDUCE the SENSITIVITY until the chatter stops.
2. Try sweeping it over the ground.
If the F4 chatters while held still, or held up in the air, it may be much quieter
when sweeping over the ground.
3. Operate in AUTOTUNE Mode
Interference is much more tolerable in this mode, even at high sensitivity.
SEVERE GROUND CONDITIONS
A secondary use for the Sensitivity Control is to reduce false detection signals caused
by severe ground conditions. While the detector contains circuitry to eliminate the
signals caused by most naturally occurring ground minerals, 100% of all ground
conditions cannot be anticipated. Highly magnetic soils found in mountainous and
gold-prospecting locations can cause the detector to emit tones when metal objects
are not present. High saline content soils and sands can sometimes cause the
detector to beep when no metal target is present.
(continued)
VII. Press the “DISCRIMINATION
+” touch pad 3 times.
Five “R”s are now displayed.
VIII. Wave all objects over the
Searchcoil
The Nail and Pull-Tab will not
be detected.
The other objects will be
detected with their own
distinctive tones.
IX. Press the NOTCH touch pad.
A flashing “s ” will appear under the IRON-1 segment.
X. Press the DISCRIMINATION
+ touch pad 3 times.
The flashing “s ” will move to
the 5¢ segment.
XI. Press the NOTCH touch pad
again
The “R” will disappear under 5¢
segment.
XII. Wave the nickel over the
searchcoil.
The nickel is detected.
XIII. Wave the penny over
the searchcoil.
XIV.Press the NOTCH touch pad
twice.
The arrow under the 1¢ segment will flash & then the “R” will illuminate.
XV. Wave the penny over the searchcoil again.
The penny (the most recently detected item) is eliminated from
detection.
XVI. Press the PINPOINT touch pad.
Hold one of the metal objects motionless over the searchcoil.
• All Metal objects are now detected.
• One monotone sound indicates the presence of any type of metal.
• A 2-digit numerical display indicates approximate target depth, in inches.
If the detector emits false, non-repeatable, signals, REDUCE THE SENSITIVITY.
18
7
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 6
QUICK-START DEMONSTRATION
I. Supplies Needed
• A Nail
• A Pull-Tab from a beverage can
• A Nickel
• A Quarter
• A Zinc Penny (dated after 1982)
II. 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 coil
off the ground).
b. Keep the searchcoil away
from walls, floors, and
metal objects.
c. Remove watches, rings
and other jewelry or metal objects from hands and wrists.
d. Turn off appliances or lights that cause electromagnetic interference.
e. Pivot the searchcoil back toward the detector body.
III. Power Up
Press the ON/OFF touch pad.
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.
IV. Wave each Object over the
Searchcoil
a.Notice a different tone for
each object.
Low Tone:
Nail
Low Mid Tone: Pull-Tab
Medium Tone: Zinc Penny
High Tone:
Quarter
b.Motion is required. Objects
must be in motion over the
searchcoil to be detected.
SEARCH TECHNIQUES (in DISC Mode)
Target Verification
After detecting a target, do the
following:
1. Walk around the target in a circle.
2. While circling the target, continue
sweeping the searchcoil across
the target.
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 identification.
If the tone or Target-ID
changes as you circle the target,
you may have multiple targets or
an irregularly shaped object.
If the tone completely
disappears at different angles, the
target may be trash or a low-value
metal.
If you are new to the hobby,
dig all targets. With practice in the
field, you will soon identify audible
certain types of metal objects.
WRONG
CORRECT
COIL MOVEMENT
When swing ing the coil, be
careful to keep it level with the
ground about 1/2 inch from the
surface. Never swing the coil like
a pendulum.
and visual target feedback with
Pinpointing process in motion modes:
1.
2.
3.
4.
5.
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 coil over same area, at 90° to 1st sweep pattern.
This pinpoints the target location with an “X”
V. Press the DISC touch pad
The detector will beep and 2
“R”’s will appear under the
iron indicators.
6
19
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 5
TARGET PINPOINTING (no-motion PINPOINT Mode)
BATTERIES
After you have identified a target using a motion mode of detection, press
the PINPOINT pad 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 excavation.
Two 9-Volt batteries are
supplied with the F2.
Pinpoint (in no-motion mode) as follows:
1. Position the searchcoil just barely off the ground, and to the side of the
target.
2. Press PINPOINT pad and raise the searchcoil about 2 inches. Lifting the
searchcoil away from the ground makes the ground signal go negative,
so the machine is silent.
3. Now move the searchcoil slowly across the target, and 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 center.
2. Press PINPOINT pad again.
3. Repeat this narrowing procedure to narrow the field of
detection further.
Note: Depth indication is less accurate after
narrowing.
COIL DRIFT
If you plan to use the PINPOINT Mode for continuous
searching, 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; press PINPOINT to retune.
Temperature change will cause the coil
to drift in point mode.
If the detector moves from a cooler
to a warmer environment, the
detector may emit a constant
tone until the temperature
stabilizes; if so, retune.
If the detector moves
from a warmer to a
cooler environment, the
detector may lose
sensitivity (remaining quiet);
if so, retune.
20
The batteries have been inserted
backwards in the compartment
for storage during transportation.
Please remove batteries, turn them
around, and install correctly.
Use ALKALINE batteries only.
DO NOT MI X OLD AND NEW
BATTERIES.
1 Remove the battery cover by
l
disengaging the clip at the back.
To install the batteries:
Do not hinge door upward; pull straight
back
2 Align the polarity of the batteries
l
correctly, with the positive "+" toward the coil plug connection, as
3 Insert (2) 9-Volt ALKALINE batteries, with the contacts pointed inward, and
l
press down on the back of the batteries to snap them into place.
indicated by the + indicator on the housing.
Some brands of batteries will require moderate force to clear the
retaining tabs.
4 Replace the battery door.
l
Most metal detector problems are due to improperly installed batteries, or
the use of non-alkaline or discharged batteries. If the detector does not turn
on, please check the batteries.
BATTERY DISPOSAL & RECYCLING
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.
USING HEADPHONES
Using headphones (not included) improves battery
life, and prevents the sounds from annoying
bystanders.
It also allows you to hear subtle changes in the sound
more clearly, particularly if searching in a noisy
location. 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.
5
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 4
ASSEMBLY
1
●
2
●
3
●
Caution: Forcing in MIDDLE STEM with CAM LOCK raised may form a burr on
camlock. If this happens, remove burr with knife to allow insertion.
•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
Position detector upright.
Rotate the LOCKING COLLAR fully in the
counterclockwise direction.
Insert your finger inside the tube and make sure the
INTERNAL CAM LOCK is flush with the inside of the tube.
LOCKING 2
COLLAR
Armrest
INTERNAL 3
CAM LOCK
●5
●
S-ROD
●
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.
S-Rod
SILVER BUTTON
MIDDLE 4
STEM
●
MIDDLE STEM
4
●
S-ROD
Hand-grip
Insert the MIDDLE STEM into the
S-ROD, with the SILVER BUTTON
pointed upward
●4
5 Rotate the MIDDLE STEM until the
SILVER BUTTON locates in the hole.
6 Twist the LOCKING COLLAR fully in the clockwise
Battery
direction until it locks.
Compartment
(back side)
7 Repeat this process on the LOWER STEM.
8 Using the BOLT and KNURLED KNOB, attach
Cable
the SEARCHCOIL to the LOWER STEM.
Plug
Locking
9 Adjust the LOWER STEM to a length that lets you
Collar
maintain a comfortable upright posture, with your arm
Search
Coil
relaxed at your side, and the SEARCHCOIL parallel to the
Cable
ground in front of you.
10 Wind the CABLE securely around the STEMS, leaving slack at
the bottom.
●
●
●
●
●
●
11
●
12
●
Headphone
Jack
5-YEAR LIMITED WARRANTY
Register your warranty on-line for a chance to win a
FREE DETECTOR.
For details, visit www.fisherlab.com
The F4 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.
Middle
Stem
Locking
Collar
Proof of Purchase is required to make a claim under this warranty.
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 consumer.
To return your detector for service, please first contact Fisher Labs for a Return
Authorization (RA) Number. Reference the RA number on your package and return
the detector within 15 days of calling to:
*
Connect CABLE PLUG to housing.
Do not twist the Cable or Plug. Turn Locking Ring only. Use
minimal finger pressure to start the threads. Do not crossthread. When the Locking Ring is fully engaged over the
threaded connector, give it a firm turn to make sure that it
is very tight. When the Locking Ring is fully engaged over the
threaded connector, it may not cover all of the threads.
1465 Henry Brennan Dr.
El Paso, TX 79936
Phone: 915-225-0333 ext.118
Knurled
Knob
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.
Tighten both LOCKING
COLLARS.
NOTE TO CUSTOMERS OUTSIDE THE U.S.A.
This warranty may vary in other countries, check with your distributor for details.
Warranty does not cover shipping costs.
Armrest Adjustment
If you wish to change the position of
the armrest, remove the screw and
move the armrest to one of the
alternate hole locations.
Biaxial
Searchcoil
* Note: Very tall users can purchase the optional Extended Lower Stem (TUBE5X), for extended reach.
4
TREASURE HUNTER’S CODE OF ETHICS:
Copyright© 2015
All rights reserved, including the right to reproduce this book, or parts thereof, in any form.
®
Fisher is a registered trademark of Fisher Research Labs
www.fisherlab.com
Made in the USA from USA and imported parts.
21
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 3
NOTES
TERMINOLOGY
The following terms are used throughout the manual, and are standard
terminology among treasure hunters.
ELIMINATION
Reference to a metal being "eliminated" means that the detector will not emit
a tone, nor light up an indicator, when a specified object passes through the
searchcoil’s detection field.
DISCRIMINATION
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 essential feature of professional metal detectors.
Discrimination allows the user to ignore trash and other undesirable objects.
RELIC
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
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.
FERROUS
Metals which are made of, or contain, iron.
PINPOINTING
Pinpointing is the process of finding the exact location of a buried object. Longburied metals can appear to the eye exactly like the surrounding soil, and can
therefore be very hard to isolate from the soil.
PULL-TABS
Discarded pull-tabs from beverage containers are an especially
bothersome trash item for treasure hunters. They come in many different
shapes and sizes. Pull-tabs can be eliminated from detection, but some
other valuable objects can have a magnetic signature similar to pull-tabs,
and will also be eliminated when discriminating out pull-tabs.
GROUND BALANCE
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. The Gold Bug incorporates proprietary circuitry and programming to
eliminate false signals from severe ground conditions.
22
3
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 2
TABLE OF CONTENTS
NOTES
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Quick-Start Demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-11
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Auto Tune . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Discrimination Control . . . . . . . . . . . . . . . . . . . . . . . . . .9
Pinpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Notch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Ground Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
Quick Ground Balancing . . . . . . . . . . . . . . . . . . . . . . .13
4-Tone Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Depth and Target Display . . . . . . . . . . . . . . . . . . . . . . . .15-16
Target Readout Table . . . . . . . . . . . . . . . . . . . . . . . . .16
DD Coil Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Bottle Cap Discrimination . . . . . . . . . . . . . . . . . . . . . .17
Sweet Spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Sensitivity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Electromagnetic Interference . . . . . . . . . . . . . . . . . . .18
Severe Ground Conditions . . . . . . . . . . . . . . . . . . . . .18
Search Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Target Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Pinpointing with motion modes . . . . . . . . . . . . . . . . . .19
Target Pinpointing (No motion) . . . . . . . . . . . . . . . . . . . . . . .20
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Treasure Hunter’s Code of Ethics . . . . . . . . . . . . . . . . . . . . .21
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Page
Coil Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2
23
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 1
OPERATING
MANUAL
LINE
A
K
AL
LY
Use ries ON
e
Batt
MF4B
Rev.5
040215
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