DeepTech MEGAPULSE III User manual

Pulse Induction Metal Detector
MEGAPULSE III

Introduction
Megapulse III is a new generation of pulse induction metal detecting instruments.
The pulse induction system is developed to automatically retune, so that changes in
the ground mineralization and unwanted metal targets are eliminated.The unit works
at great depths and ranges by smooth and stable operation from the control unit in
automatic motion mode.
How does MegapulseIII work?
The search coil sends out short magnetic pulses and produces a strong
magnetic field above the ground. The magnetic field induces eddy currents in the
metal objects to be detected. These currents generate a secondary electromagnetic
field, which flows outward from the target. A portion of this secondary field passes
through the antenna winding. This signal is processed by the electronics and
displayed by a ticking rate, meter response. The timely decoupling between the
transmitting and receiving phases allows the MegapulseIII to work with an increased
transmitting and receiving power.
MegapulseIII controls
Control unit
1 Dela Control
a. Sets the Dela timing for various soil conditions.
2 Sensitivit Control
a. Sets the Sensitivit for the coil.
3 Interference Control
a. The abilit to tune out background interference caused b electrical
lines in the area.
4 Threshold Control
a. Used to ground balance the detector.
5 Mode Selector
a. Abilit to select between “Auto/Semiauto”
6 Reset Button
a. Used to reset the threshold and re-balance instrument after changes are
made.
7 Signal Intensit Meter
a. Indicates the intensit of the received signal.
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DELAY-This knob changes dela in pulse induction signal. Far left position is
for Beaches or Ver light soil minerals (signal bounces back to control unit fast
with small dela ). Set switch top center position for standard or general
operating conditions. Far right position of knob to work in heav mineral
ground or VERY deep and large targets (allows signal to reach depths and
return to unit…also mineral readings are more dissipated).
INTERFERENCE- Setting for electromagnetic disturbances (i.e. Power Lines)
INTENSITY METER-Shows target intensit as getting closer to metal and also
indicates batter life when unit is first turned on. Batter is good if in the
“batter good” level. Charge otherwise.
On-Off/Sens- knob to turn control unit on, show batter voltage when turned
on, and change how sensitive the coil is to metal targets. Far left position is for
ver large or near surface targets. BLACK DOT on control unit label is for
standard detection setting. Far right position is for the highest sensitivit to
targets. Setting too high will receive all nearb metal targets. Turn down knob if
unit is active too often.
TRESH-Is threshold or beginning of detection audio (sound). Set Threshold to
give one or two “ticks” per second.
RESET- Button to reset control unit in new ground conditions. Depressing
button one or more times is needed in each new target area or if an other
settings are changed. Pressing reset over metal will ignore similar metal targets.
The machine needs to be reset over a clear area (not on targets), not including
minerals in ground.
Rear Panel of Control Box
Built-in loudspeaker - For audible target indication
Safet Fuse – MegapulseIII is protected against feedback.
Phones -An outlet for an t pe of headphones with a .” mono-jack.
12V DC -Female plug that adapts male end with center positive for external 12
Volt rechargeable batter pack. To charge batter , remove from Velcro
strapping on back of control unit case. Plug rectangular male plug from charger
into matching female plug on batter . Location is opposite side of black control
unit batter plug. Do not alter batter plug or charger end.
Coil -Connector for search coil. Lightl screw down in a clockwise direction.
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STANDARD SEARCH
(1m x 1m Coil)
The loop cable is embedded in PVC tubes and can be assembled for use or
dismantled for transportation easil and quickl . The concentrated magnetic
field of the coil allows and excellent detection range on relativel small metal
objects. Targets the size of a cash box are clearl detected from a distances of 7-
8 feet. Larger Targets like a large metal treasure chest can be detected at a
range of up to 15 feet or more depending on soil conditions. Our practical tests
have proven this universal search coil as the best one for treasure hunting with
the MegapulseIII.
AUTOMATIC MODE
(1m x 1m Coil)
The detector retunes automaticall to the changes of the ground conditions
(mineralization). Keeping constant operational height and all the slowl
changing external electromagnetic fields are not critical for the stable
performance of the MegapulseIII pulse induction s stem.
REMINDER: Automatic Mode is motion detection. The search coil needs be
moved completel through the target area.
DETECTION RANGE
Theoreticall the detection range increases with the increased target’s size,
time in ground, until the size of the detected object is double the surface of the
search coil. Smaller coils of approximatel 11” diameter have a specific range of
objects, which are detected well. Continuous wave detector’s sensitivit is better
on small metal targets. Such coils and detectors have reached their limits with a
detection range of approximatel 1 meter. Enormousl large amounts of metal
would be necessar to increase their detection range over these limits. The
search coil of the pulse induction detectors could be increased to almost an size,
so that a large long ranging magnetic field would be built up. The MegapulseIII
works using a magnetic field caused b short pulses. The large search coil and
the low frequenc applied make it capable of penetrating deep into the ground.
The MegapulseIII pulse induction principle offers man other advantages:
. Large detection range and extreme depth of detection
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. Small objects like bottle caps, pull tabs, pieces of aluminum are rejected
. The device can be operated effectivel in highl mineralized soil areas,
beaches, fresh and salt waters.
. High qualit components are used and all critical parts of the circuit are
designed to align themselves to signal drift due to changing temperatures
. The hot rocks are categoricall ignored
. MegapulseIII is a professional deep treasure-hunting instrument with its
incredible depth detecting capabilities.
. The unique automatic motion mode of operations makes it user-friendl
even for the beginners
Quick Start Guide:
1. Make sure batter is full charged.
2. Attach the batter to the carr ing case.
3. Plug in batter to back of unit.
4. Connect the coil to the shaft.
5. Connect the coil to the back of the unit.
6. Set the “Interference” knob to the middle position.
7. Turn all other knobs to the left (counterclockwise).
8. Set our Mode (Auto/Semiauto).
9. Turn on unit and set the Sensitivit Knob to the black dot.
10. Slowl turn the Dela knob to the right (clockwise) until the unit is not
making an more noise.
11. Slowl turn the Threshold knob to the right until ou are just hearing one to
two ticks per second.
12.Move in a forward, left, or right direction keeping the coil level.
Do not push the reset button over metal targets. This will clear them from being
seen again.
After re-adjusting the dela or sensitivit ou ma have to push the Reset button
more than once in order for it to correct against the background.
FIELD GUIDE
1.Assemble the search coil and connect its plug to the jack on the rear panel of
the control box. Lift the coil at the operational height (3-6 inches) over a place
free of an metals.
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2. Attach Antenna Belt Straps (2) to coil and adjust for comfortable level (for 1
Meter coil ) onl .
3. Attach batter connector to back of control box for power.
4. To start, all knobs are FIRST set to “0” or off position at farthest left.
5. Select the position switch appropriatel to detection mode desired (see
control panel description).
6. Stand in working position- level coil distance on both sides- and AVOID all
close metal under coil for correct balance.
7. Turn “Dela ” knob to desired position for target detection (see panel
description for choices of dela ). Push the Reset Button.
8. Turn “Interference” knob to center position when no interference from
electromagnetic interferences is present. If interference is shown from other
than ground metal, tune knob from left to right appropriatel until interference
is removed (do not move other knob positions after setting interference setting.
Push the Reset Button.
9. Turn on unit with “sensitivit ” knob to small black dot on MegapulseIII
control unit faceplate label as standard target operation mode. Lower sensitivit
at far left for ver large or shallow targets, or highest sensitivit at far right of
know position for ver small or deep targets. Too high of a position will set
detector off at ever small metal change. Batter voltage is shown in “Batter
good” portion of meter b needle if no charge is needed. Drop in voltage will
cause incorrect readings and balance. Charge if line indication is shown below
this mark.
10. Push Reset button one or more times to balance machine.
11. After following all previous instructions, begin to slowl turn “Threshold” to
setting where one or two “ticks” are heard. This should leave needle on meter at
or between “0” and “1”.
12. You are now read to detect. REMEMBER this is a “motion” detection
s stem, so do NOT stop when receiving a metal detection signal. Walk all the
wa through the target. Mark with our foot on ground where signal is first
read between coil parts and once signal stops. This makes TWO sides of a box.
Simpl walk the opposite direction of target signal (making 4 sides of a box).
Mark once signal is received first and then when stopped. You should have four
marks on the ground. You can then pinpoint with 11” coil.
Practical use
Searching with the MegapulseIII is eas , when two persons bring the standard
search coil. One of them carries the electronics box (at the opposite to the search
coil side and tr ing to keep the electronics box as possibl far from the search
coil’s frame), watching the indications and making adjustments during
operation.
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You should not carr watches, belt buckles or metal plates in our shoes, as
the could cause false signals if close to the search coil.
Walk normall , and if the terrain allows it, carr the search coil at a lowest
possible and constant level operational height over the ground.
The small shallow metal objects will produce two peaks of the ticking-
rate/meter deflection . Lifting the search coil could cut out such small
sized objects. There are some trash areas, where bringing the coil higher would
be advantageous. A mid-sized metal object buried at one meter or so, will give a
ver clear, distinguishable indication. A Large metal target deep in the
ground will cause a long indication over a larger area than the smaller metal
objects.
With some practice ou ma be able to estimate the depth (shallow targets
onl ), the size and even the form of the target detected. The best wa of getting
acquainted with our detector and its responses to different metal targets is to
locate our buried metal pipes around our home. Of course, the reaction of the
detector would be much better if the metal targets have been buried in the
ground for a longer period of time (like 30 to 50 rs). Walk the test area making
sure that ou are passing all the wa through the target until the unit is quiet
again. Make necessar adjustments to our detector, and tune it carefull awa
from the targets. Tr to carr the coil 2-6” high, if the terrain allows that. Pass
over our buried utilities. Note the differences between the indications of the
targets.
Being in Automatic Mode, stop over one of our targets. In few seconds the
detector will tune itself to this metal object. You’ll then be aware of that through
the ticking rate, which has alread become normal, as set b the manufacturer
for the Automatic Mode. Move aside. Pass over the same target, this time not
stopping our movement over it, and the detector will register it again. So, don’t
stop the search coil’s movement over a metal target while operating our
detector in Automatic Mode.
While testing the detector, please note the following:
-Tr to keep a constant operational height of the search coil.
-The detector is ver stable while in its Automatic Mode of operation.
MegapulseIII successfull compensates the effects of the changes of the search
coil’s operational height, and retunes automaticall to the changes in the ground
conditions and to the slowl changing external electromagnetic fields.
-MegapulseIII is a t pical motion detector. This means that the search coil
should be moved over and through the metal target, if ou stop our
movement, then the detector will automaticall retune itself and ou’ll loose
the target.
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-The loss of depth during the operation in the Automatic Mode could be due to
incorrect tuning of the detector.
General Notes
Interference
In most of the cases interference is due to magnetic disturbances like power lines
and ma make detection difficult. Heav current cables nearb could cause
severe interference. Magnetic effects of soil, and its high mineralization could
also cause interfering signals. To reduce them, see “field guide” for detail of
interference removal operation.
Maintenance
Do not store the detector if the device is wet or dirt . Keep the connectors and
jacks dr and clean. In case of malfunction, first check the batter voltage and
the cable connections. Repair work should be carried out onl b trained
personnel. Inexperienced intervention would cause expir of the warrant .
Tampering with the seals will void an and all warranties. Either expressed or
implied. Unit has no user serviceable parts. Unit has no internal batteries.
Batteries
We suggest using a Multi-Meter to test the batter voltage prior to using
instrument. Overcharging of batteries ma cause the unit to cease operation.
You should be able to run the instrument for 16-20 hours prior to recharging
the batteries. Charging time on empt batter is max.14 hours.
Storage
Store our equipment in a clean dr place. Excessive moisture ma cause
damage to our equipment. Traveling from a cold area to a hot area ma cause
condensation. If the conditions for condensation are present, give the equipment
time to adjust prior to turning on.
Permission and Laws
Prior to searching and digging ou must have permission to search private
propert from the owner or caretaker. Know the laws that appl to the area ou
are going to search in. Laws var a great deal with the Cit , Count , State, and
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Countr , regarding the use of metal detectors. Be respectful of public and
private propert , and the laws, which govern the use of metal detectors, and fill
all holes after recoveries.
Troubleshooting
M unit does not maintain its ground balance.
Check the batter . In most cases an undercharged batter will cause this to
happen.
- or –
There could be spots of mineral content that ou are tr ing to balance device
over.
- or –
When balancing unit ou are holding the unit too high off the ground, or
directl on the ground. Hold coil 12”–16” (25cm to 35cm) above ground to
balance initiall .
I found a metal object, re-tuned m detector, now it is gone. Wh ?
You re-tuned the detector while still in the field of the metal target. You have
discriminated out the target ou were looking for.
I cannot get the unit ground balanced.
Adjust the Interference. It is possible that ou are too close to an electrical
source and the source will have to be tuned out b turning the knob either to the
left or the right.
M batter connection keeps coming loose.
With batter disconnected, open the two prongs on the control unit to allow for
better batter contact.
It beeps and there is no target. Wh ?
Minerals with round and square coil are patch sound and usuall are not
identifiable more than twice.
Technical Specifications:
• Working Voltage 12v DC
• Continuous Power Consumption 190mA
• Maximum Power Consumption 380mA
• Working Frequenc 100-130Hz
• Sound Range 0-10000Hz
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• Batter T pe -Rechargeable 1,3 ( 2,3 – optional )Ah,hermetic,acid Batter
• Batter Charging Time (empt ) 14 Hours
Charger Output 14,6 VDC 500 mA
• Charger Input 100/240 V 50/60Hz AC
This device is designed for detecting deepl buried or lost metal objects, metal
pipes, underground communication equipment, treasures and similar objects.
The unit works b the principle of electromagnetic induction at ver low
frequenc , which allows penetration deepl in the ground. Soil conditions var
from area to area and actual depth ma var depending on the dielectric
properties.
The depth, combined with iron object discrimination, automatic tuning and the
choice of different regimes for searching, make the unit hardl replaceable in a
lot of situations.
Limited Warrant Information
DeepTech warrants your consumer or industrial procuct against defects in material
or workmanship for a period of two years on the electronic box and one year for the
search coils from the date of purchase.If DeepTech determines the product to be
defective in materials or workmanship,DeepTech will replace or repair the product to
the original purchaser only.
Any alternation of the electronic circuit by an unauthorised person will lead to
breach of warranty.
This warranty does not cover demage due to a fall,shock and accident;
deteriorations due to an anormal use; cable breakage of the search coils or of one of
its conductors.
If warranty service should be necessary, the detector must be returned complete
with proof of purchase and a notice explaining the fault.
DeepTech reserves the right to change the design or specifications of its detectors
without notice.
Notice
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