The
Discovery 3300
is a professional metal detector. While the most
difficult aspects of metal detecting have been automated, it is a sophisticated electronic device which
requires an understanding of some basic features and metal detecting concepts.
If you do not have prior experience with a metal detector, we strongly recommend that you:
1)Adjust the Sensitivity to a low setting in the event of false signals. Always begin use at a reduced sensitivity level; use at full sensitivity after you have become familiar with the detector.
2)Do not use indoors. This detector is for outdoor use only. Many household appliances emit electromagnetic energy, which can interfere with the detector. If conducting an indoor demonstration, turn the sensitivity down and keep the searchcoil away from appliances such as computers, televisions and microwave ovens. If your detector beeps erratically, turn off appliances and lights, especially those with dimmer switches.
Also keep the searchcoil away from objects containing metal, such as floors and walls.
3)Read this manual. Most importantly, review the Quick-Start Demo (p.7-8) and Basic Operation (p. 9-12).
4)Use 9-volt ALKALINE batteries only. Do not use Heavy Duty Batteries.
TABLE
OF
CONTENTS
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Quick-Start Demo . . . . . . . . . . . . . . . . . . . . . .7-8
Basic Operation . . . . . . . . . . . . . . . . . . . . . .9-12
All Metal . . . . . . . . . . . . . . . . . . . . . . . . . .10
Discrimination . . . . . . . . . . . . . . . . . . . . . .10
Notch . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Zap . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12
Pinpoint . . . . . . . . . . . . . . . . . . . . . . . . . .12
Headphones . . . . . . . . . . . . . . . . . . . . . . .12
Audio Target Identification . . . . . . . . . . . . . . .13
Depth and Target Display . . . . . . . . . . . . . .14-15
Sensitivity Adjustment . . . . . . . . . . . . . . . . . . .16
In The Field Techniques . . . . . . . . . . . . . . .17-21
Ground Balancing . . . . . . . . . . . . . . . . . . .20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .22
Treasure Hunter’s Code of Ethics . . . . . . . . . . .23
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Accessories . . . . . . . . . . . . . . . . . . . . .Back Page
2
TERMINOLOGY
The following terms are used throughout the manual, and are standard terminology among detectorists.
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 coil’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 important feature of professional metal detectors. Discrimination allows the user to ignore trash and otherwise undesirable objects.
NOTCH - Notching is the elimination of an item, or range of items, within the metallic spectrum. We “notch-out” an object, or objects, selectively. Objects to the left and right on the metallic spectrum
can be retained using the notch technique.
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. Long-buried metals can appear 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 the most bothersome trash items 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 Discovery 3300 incorporates proprietary Super-Scan™ circuitry to eliminate false signals from severe ground conditions
3
ASSEMBLY
Adjusting the Arm Rest
Most people will find the standard position of the arm rest very comfortable. Very large forearms and short forearms (particularly children’s arms), can be accommodated by moving the arm rest forward.
The arm rest is adjustable to three positions.
To adjust, remove the screw from the underside, then press the silver button and move the arm rest to one of the alternate positions. If you cannot fully depress the button with your finger, use a narrow object, such as the blunt end of a ballpoint pen. The arm rest must be twisted with moderate force to move it to an alternate position; this adjustment is usually made infrequently.
If desired for added stability, re-install the screw. The screw is not re-installed in the furthest forward position.
If the button becomes disengaged inside of the tube, remove the plastic cap at the end of the tube to access the clip inside. With a pair of needle-nose pliers, reengage the button. Then replace the plastic cap.
4 |
S-Rod
Locking
Collar
Silver
Button
Searchcoil
Cable
ASSEMBLY
Assembly is easy and requires no tools.
● Position detector upright. |
LOCKING |
|||
● Rotate |
the |
LOCKING |
COLLAR |
|
INTERNAL |
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COLLAR fully in a counter |
||||
CAM LOCK |
||||
clockwise direction. |
SILVER BUTTON |
|||
● Insert your finger inside the |
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MIDDLE |
||||
tube and make sure the |
STEM |
|||
|
||||
INTERNAL CAM |
LOCK is |
S-ROD |
||
flush with the inside of the |
|
|||
tube. |
|
S-ROD |
MIDDLE STEM |
|
|
|
|
||
●Insert the LOWER STEM into 
the S-ROD.
●Rotate the LOWER STEM until the SILVER BUTTON locates in the hole.
●Twist the LOCKING COLLAR fully in the clockwise direction until it locks.
●If your detector has 3 tubes and 2 locking collars, repeat this process on the Middle Stem.
●Position the Lower Stem (the straight tube) with the Silver Button toward the back. Using the Bolt and Knurled Knob, attach the Searchcoil to the plastic extension protruding from the Lower Stem.
●Press the button on the upper end of the Lower Stem, and slide the Lower Stem into the S-Rod.
Adjust the Stem to a length that lets you maintain a comfortable upright posture, with your arm relaxed at your side, and the Searchcoil parallel to the ground in front of you.
● Wind the Cable securely around the Stem.
● Insert the Plug into the matching Connector on the right underside of the Detector Body. Be sure that the key-way and pins line up correctly.
Caution: Do not force the plug in. Excess force will cause damage.
To disconnect the cable, pull on the plug.
Do not pull on the cable.
5
BATTERIES
Use ALKALINE batteries only.
To install the batteries:
● Remove |
the |
battery cover by |
|
disengaging |
the |
clip at the back.
● Align the polarity
of the batteries correctly, with
the positive "+" toward the coil
plug connection, as indicated by the + and –
indicators on the housing.
●Insert (2) 9-Volt ALKALINE batteries, with the contacts pointed inward, and press down on the back of the batteries to snap them into place.
Some brands of batteries will require moderate force to clear the retaining tabs.
●Replace the battery door.
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.
6
QUICK-START
DEMONSTRATION
I. Supplies Needed |
|
• A Nail |
• A Quarter |
• A Pull-Tab from a beverage can |
• A Zinc Penny (dated after 1982) |
• A Nickel |
|
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
Turn Ground Balance knob to pre-set position.
Press the POWER touch pad.
IV. Wave each Object over the Searchcoil
a.Notice a different tone for each object.
Bass Tone: Nail Low 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.
V. Press the DISC A-M touch pad
The detector will beep twice and 3 “R”’s will appear under the iron indicators.
Quick-Start Demo continued on next page
7
QUICK-START DEMONSTRATION
VI. Wave the Nail over the Searchcoil
a.The Nail will not be detected.
b.The Nail has been "Discriminated Out."
VII. Press the “DISCRIMINATION- ▲” touch pad twice.
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 “R” will appear under the 5¢/PT segment.
X. Press the DISCRIMINATION ▲ touch pad three times.
The flashing “R” will move to the ZINC segment.
XI. Press the NOTCH touch pad again.
The “R” will appear under zinc.
XII. Wave the zinc penny over the searchcoil.
The penny is discriminated out.
XIII. Press the DISC A-M touch pad
The detector returns to ALL-METAL mode. No “R”s are displayed. All types of metals will be detected.
XIV. Wave the pull-tab over the coil.
XV. Press the ZAP touch pad.
An “R” will appear.
XVI. Wave the pull-tab over the searchcoil again.
The pull-tab (the most recently detected item) is eliminated from detection.
XVII. Press the PINPOINT touch pad.
Hold one of the metal objects motionless over the searchcoil.
•All Metal objects are now detected.
•Depth and Target indicator do not illuminate in this mode.
•One monotone sound indicates the presence of any type of metal.
8
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