Detech EDS plus II User manual

II

ASSEMBLING YOUR DETECTOR
1. On the lower rod assembly, remove the mounting screw and thumb nut
from the rod tip.
2. Insert the rod tip between the mounting ears of the search coil and align
the holes of the rod tip and washers with those of the mounting ears.
3. Insert the mounting screw through the holes in the mounting ears and rod
tip.
4. Install the thumb nut on the mounting screw and tighten by hand.
Note: Tighten the thumb nut after you have assembled the whole handling
and adjusted the search coil in working position toward the ground.
5. Slide the lower rod into the middle rod until the snap button clicks into the
first adjustment hole.
Note: The tightening of the locking ring should be done after you have
assembled the whole handling and when you have adjusted the working
length of the handling.
6. Press the snap button of the upper rod assemble (S-rod) and slide the
upper rod into the other locking ring of the middle rod assembly until the snap
button clicks into the hole locking the two assemblies into place. Tighten the
rod lock to secure the two assemblies together.
7. Wrap the cable around the rod leaving
enough slack near the searchcoil to permit
searchcoil adjustment.
Note: Do not allow the cable to flop loosely
over the searchcoil. Since the detector is
sensitive enough to see the tiny wires in the
cable, a floppy cable can cause false signals
as the searchcoil senses the moving wires. To
secure the coil cable from unwrapping you
should fix it to the lower and to the upper end
of the handling with the two cable retainers.
1

ASSEMBLING YOUR DETECTOR
Your detector is standardly equipped with 9X9" and 12X12" new SEF PRO
coils. These coils have better sensitivity and depth, better pin-pointing, keep
perfect balance even in high temperature range.
For getting acquainted with the detector’s operation we recommend you at
first use the smaller sized 9X9" coil. The 12X12" coil is more sensitive and
deep, but to use it you should have some more experience with the
operation of the detector.
For first tests and acquaintance with the detector we recommend you make
this in field conditions, away from the electromagnetic interferences of the
built up areas.
The length of the handling should be adjusted so that
the detector does not become tiring or uncomfortable
after long use. The detector grip should rest in your
hand with your arm relaxed, with the shaft extending
out in front of you. You should be able to swing the
detector back and forth in front of you, using relaxed
shoulder movement. The search coil should not touch
the ground during your sweep. The angle of the search
coil should allow its bottom to be parallel to the ground,
as shown on Figure 1 .
Swing the detector from side to side in about three foot
arc, overlapping succeeding strokes well. The detector
is designed to get maximum depth without the requirement
for speed of sweeps, so go at a pace that is comfortable for
you. In fact, trying to hunt too fast may even cause a loss of depth in heavily
mineralized locations. Regardless of which mode you are using, try to keep
your search coil height constant and at about an
inch over the ground surface. Most people tend to
raise the coil at the end of the sweeps, much like a
pendulum, especially if they are in a hurry (Figure 2)
Try to avoid this as any increase in height from the
ground will cause a corresponding loss of detection
depth. This is easy in lawns, where you just allow
the coil to rest on the grass as you sweep from side
to side. In rough and rocky areas it is not so easy.
Hitting the ground or rocks may cause false signals.
The sharp lowering, pressing the coil to the ground,
especially in wet and heavily mineralized grounds,
could also cause false signals.
Figure 1
Figure 2
2

AUTO MODE OF OPERATION
First we’ll introduce the easiest mode of operation of the detector. Further
in the instructions we’ll call it AUTO mode. The important thing for this mode is
that there would not be necessary to make manual ground adjustments to the
different ground conditions.
Turn all the controls and switches to the red marked positions (Figure 3).
GND adjust and threshold do
not have red markers, as they
do not take part in this mode
of operation. Freq.1/Freq.2
switch has no red marker too.
The frequency 1 or 2 is
chosen depending on which
of these two frequencies the
detector is less noisy. The
choice is made with one and
the same sensitivity level.
When turning the detector
on (on/off control) it
congratulates you with
alternating green and red
lights . Then for a second
the LED indicator will light
in green, if the batteries are
charged, and in red if the batteries are
discharged and need to be recharged.
The disc control has two red zones. For nugget hunting is the most
counterclockwise red zone. In this zone you won’t have audio discrimination.
For coin shooting use the coins zone. If you want to dig the bigger sized
ferrous targets like knives, arrows and spears, rifles, guns, turn back this
control to the relic position. In this position the detector will reject only the tiny
pieces of wire. Do not increase the discrimination beyond the foil mark, the
detector will start rejecting some thin jewelry and low conductivity coins or
other targets. More detailed description of the functions of this control will be
given in the instructions further on. After you have got accustomed with the
detector’s operation with these settings, you could turn the low/high switch to
the high position. This will make your detector significantly more sensitive and
deep. You could add more sensitivity by further rotating clockwise the sens.
control, until you hear rare interrupted noises. The coil should be static while
you change the sensitivity level, and the interrupted noises will fade when you
start sweeping the coil.
Figure 3
3
threshold
all metal
M ground
A ground
low
freq.1
freq.2
high
GND adjust
disc.
AMD
relic
coins
nugget
foil
sens.
ON/OFF
low
II

AUTO MODE OF OPERATION
4
IMPORTANT NOTE: When operating on very heavy and wet grounds,
especially if using the bigger sized coils (12x12 inches) while passing the
coil over an open hole in the ground, even if there is no metal in it, is
possible to hear false signal, as if in the hole there was a metal target. In
such case switch the M/A ground to the M ground position and press the
GND adjust control to “sink” into the panel (the led indicator will light in
green).In most cases this will eliminate this negative affect and will result
in more stable operation of the detector, of course, slightly decreasing its
depth parameters. If the affect of the hole does not disappear, you should
assemble the smaller sized coil.

MANUAL MODE OF OPERATION
The AUTO mode of operation is the easiest one, but it does not give you
the best performance as sensitivity and depth of the detector. In the chapter
below we’ll introduce the Manual mode of operation. This mode
of operation is recommended for very experienced
detector operators. In this mode is always made
a manual ground balance.
Please, raise and hold your search coil about
10 inches off the ground and parallel to the ground
surface, as shown on Figure 4. You should be away
from metal objects. Then turn the switches all metal/disc
to all metal, A ground/M ground to M ground (manual
ground balance), see Figure 5. The engagement of
M ground and all metal positions activates the
GND adjust (ground adjust) and threshold controls.
The disc. control becomes non-active, the detector
won’t have audio discrimination and will register with one and the same tone
all the metal targets, no matter the rotation of the control in one or other
direction. Now turn on the detector rotating the sens. control to the red
marked position.
Then rotate the threshold
control until you start hearing
a very weak, faint hum.
Now slightly press the GND
adjust control until it “sinks”
into the panel. At the moment
of pressing the control you’ll
here a slight click, and the
indicator in the centrum of
the panel will light green.
Then release GND adjust
control. The indicator will turn
off and you are ready for
manual adjustment of the
ground balance. Lower the
coil to about 1 inch off the
ground - the threshold tone
will get louder. Turn the GND
adjust control clockwise. Then pick
up the coil and push down again. The threshold hum gets louder again. and
you’ll have to rotate the GND adjust control further clockwise. Continue with
this, and on normal grounds at the fourth-fifth clockwise turn of the GND
Figure 4
Figure 5
10"
5
threshold
all metal
M ground
A ground
low
freq.1
freq.2
high
GND adjust
disc.
AMD
relic
coins
nugget
foil
sens.
ON/OFF
low
II

MANUAL MODE OF OPERATION
adjust control the threshold tone won’t change while lowering the coil to the
ground. At this point the detector is balanced for the area and ready to hunt. If
you rotate the GND adjust control further clockwise, you’ll pass this point of
balance. Then the detector will get quiet while lowering the coil to the grounds
surface, and it will increase the threshold tone when raising the coil. This
means that you should return the GND adjust control slightly
counterclockwise until you get a constant threshold hum while pumping the
coil. Lets note, that from the sinking into the panel the clockwise rotating of the
GND adjust control in continuation of 11 turns there will be a change in the
ground balance. If you continue to rotate the knob after these 11 turns you
won’t get any more change in the balance. If you are confused for some
reason, press again the GND adjust control, this will return you to the initial
point, and you could start the procedure again.
When you ground balance on very heavy grounds it is possible to have
cases when you hear increasing tone while lowering, and while raising your
coil. If this increased tone is with one and the same volume you have a correct
ground balance adjustment. This is a normal affect for the very heavy
grounds. To decrease this unpleasant affect you could decrease the
sensitivity level of the detector.
Remember that the coil must be lifted straight off the ground. Swinging
the coil in an arc will cause false readings and will result in not proper ground
balance.
If the all metal/disc. control is in all metal, and the switch A ground/M
ground to A ground position the detector won’t operate correctly and while
nearing the coil to the ground surface you’ll hear increasing threshold tone.
The affect of the hole
When you operate the detector on heavy and wet soils conditions,
especially when you use the bigger sized coil while passing over an open hole
you’ll hear audio signal from the detector, even if in the hole there is no any
metal object. To avoid this unpleasant effect while sweeping the coil over the
hole rotate the sens. control counterclockwise. If even with minimum
sensitivity level the affect of the coil does not disappear you should turn the
detector in Auto mode of operation (page 4).
If you have made a good adjustment of the ground balance for certain
ground, and it is rich of hot rocks, these hot rocks will give a quite specific
negative response. The sound they give is quite special, but with some
practice you’ll be able to recognize exactly the signals coming from such hot
rocks.
While operating on normal grounds some very experienced professional
TH-ers, in order to increase the sensitivity and depth of penetration,
6

MANUAL MODE OF OPERATION
especially for smaller targets, after finding the exact ground balance point
they rotate slightly clockwise the GND adjust control until they receive an
increase of the threshold volume when raising the coil. This is a difficult way of
operation, because it is possible to appear false signals caused by the curved
ground balance.
If during the operation you start hearing parasitic signals and feel that
your detector has lost its stability most probably the soils conditions have
changed significantly. You should ground balance the detector again for
these changed ground conditions.
In some specific ground conditions the ground balance point would not be
found. When this happens it is best to switch to the AUTO mode of operation.
The same you could do in any case when you meet difficulty with the ground
balance adjustment on some grounds.
You should know that the processor of the detector does not remember
the last adjustment of the ground balance which you had used. So that if you
have turned off the detector and turn it on again even on the same ground
you’ll have to make a new ground balance adjustment.
Ground balanceing is a learned skill that you should practice often.
7

DISCRIMINATION
8
The disc control is enabled when you switch the all metal/disc. to the disc.
position .The fully counterclockwise position is marked in red - nugget. In this
position you won’t have any audio discrimination of metallic objects. You
should know, that in heavily mineralized ground tiny pieces of gold can
sometimes look like iron to the metal detector, and
small iron pieces can look like gold. So we
recommend this mode of operation for nugget
hunting.
The next zone is the AMD (all metal disc) zone. The
professional TH-ers use this mode of operation to
study the new sites they are working on.
The advantage of the AMD adjustment is that you
won’t miss any metal target in the ground. The bad
thing is that you’ll have to loose time for digging too
many unwanted ferrous targets like pieces of wire,
nails, etc.
The next zone of this control is relic. As we earlier mentioned in this position
the detector will eliminate only the tiny pieces of wire. All the bigger sized
targets will be accepted. Most professionals prefer working with this
adjustment of the disc. control, because the detector is really deep with such
a low discrimination level.
The next zone is coins. Here you’ll have good rejection of the ferrous
targets, and you’ll accept all the non-ferrous targets. We recommend this
position of the disc. control for searching areas littered with iron trash. If you
have too many pieces of foils rotate the disc. control after the foil zone. Have
in mind that the categorical foil rejection will bring to the rejection of some thin
golden jewelry.
If you decide to use even higher level of discrimination, for example the last
zone or the one before it you’ll reject the foil, more of the pull tabs, screw caps,
but you’ll loose some coins like the nickel 5 cents. The detector will keep its
good response to more of the coins, like 1 cent, dime, quarter. Even the lower
conductivity ancient coins like the Greek obols, diobols, the Roman asses,
follises, sestertii, the Byzantine follises will produce nice, smooth response. A
big part of the jewelry will be rejected, as well as the thin small gold coins. We
do not recommend such high levels of discrimination.
Even if you are with the highest discrimination level the big oxidized irons
will not be discriminated. Though they produce a clear response, the more
experienced detectorists manage to discern them and avoid their digging.
Figure 6

NUGGET HUNTING
9
The easiest mode of operation for nugget hunting is the Auto mode (see the
AUTO MODE of operation chapter). Have in mind that the disc. control should
be in the nugget red zone(Figure 7).
In this position, as in the AMD zone you won’t
have audio discrimination of the metallic objects
in the ground. Lets remind you again that in
heavily mineralized grounds the tiny pieces of
gold can sometimes look like iron to the metal
detector, and small iron pieces can look like gold,
so we recommend this mode of operation for
nugget hunting. The advantage is that you won’t
miss any metal target in the ground. Move the
coil just over the grounds surface and with a
mean speed of movement. Probably you’ll need
time to determine the proper search speed and technique. Do not go too fast.
Try to overlap your sweep path so that you won’t miss the small and deeper
metal targets.
For maximum sensitivity and deeper searching with the detector we
would recommend to turn the detector to MANUAL MODE of operation. This
mode of operation will require more patience and very good knowledge of
your detector operation and control. It is designed to find gold nuggets,
however it is very useful for relic hunting, and the detector will also respond to
all metal alloys including common coins.
Figure 7

BEACH HUNTING
10
For beach hunting we recommend the operation of the detector in its
AUTO mode of operation. Lets start with the beach hunting on normal dry
beaches.
These beaches are easiest for searching, and allow the highest increase
of the sensitivity level, even switching to high of the high/low switch. Of
course, if there are no strong electromagnetic fields nearby. On the beaches
the most valuable finds are the golden rings, golden earrings, golden chains.
May be you know, but the thin golden jewelry is low conductivity, so not to miss
them we recommend the position of the disc. control between relic and
coins. If you go further clockwise, beyond coins, the detector will start
rejecting the tiniest golden chains. If you want to ignore the thin jewelry, and
emphasize on coin shooting and search of higher conductivity jewelry you
could increase the disc. control level, so that you start rejecting the most of
the foils. This will save you the scooping of unnecessary trash, but you’ll loose
the thin golden jewelry.
Searching on salt wet sand beaches. In such conditions to have a
smooth operation of the detector, with no false signals, first turn the high/low
switch to low. Then do not choose too high levels of the sens. control. And the
most important - while sweeping over the wet sand rotate the disc. control
clockwise until the parasitic signals, caused by the conductivity of the wet
sand, disappear. This rejection of the parasitic signals will be active after the
coins zone. To keep a good sensitivity to the targets in the wet sand it is very
important to stop rotating the disc. control exactly at the point where the
parasitic signals are rejected. If you pass this point you won’t hear any more
parasitic signals, but will reject some good targets.
Searching on black sands. These sands contain high percentage of
magnetic negative iron oxides. In such conditions many of the low
conductivity non-ferrous targets will look like ferrous for the detectors. That is
why we recommend you for black sand hunting to decrease the disc. control
level. Remember that it is best to search in the AUTO mode of operation. It is
advisable also to switch to low the high/low switch, and not to increase too
much the sensitivity level. Do not worry about the decrease of the level of
discrimination - on the beaches the ferrous targets are rarely met.

CONTROLS
11
Figure 8
The sens control is often thought of as a depth control and it is, but it can
also be used to make the detector more stable if interference caused by
ground mineralization or electrical fields are experienced. The sens control
works in conjunction with the adjustments of the high/low switch. The low
position of that switch is for maximum stable operation, while the high position
is for maximum sensitivity and detection depth.
For mass searching we recommend to use the low
position of the switch. The beginners could use it and
increase the sensitivity level to the boundary where the
detector remains quiet and stable. For the very experienced
TH-ers we would recommend the position high of the switch.
For maximum depth and sensitivity the professionals should
then rotate sens control clockwise until they hear rare,
interrupted tones from the speaker. When they start sweeping
the coil these tones will be oppressed by the ground, and the
operator will hear only the useful responses from targets in the ground.
Of course, all this is valid if the detector is operated in its Discrimination Mode.
The switching to high should be made if the ground and atmosphere
interferences are normal. If the grounds are heavily mineralized, or if there are
too many electromagnetic disturbances, the low position of the same switch
should be used.
When testing the detector in built-up places, where there are many
electromagnetic interferences, you won’t be able to increase too much the
sensitivity level. That is why for the tests of the real parameters and qualities of
the detector we would recommend the field testing. If the detector is slightly
noisy, before decreasing the sens. level try with a change of the operation
frequency (from freq.1 to freq.2 or vice versa) and check whether the detector
has become less noisy.
The normal position of the freq.1/freq.2 switch is the freq.1,
and it is for 13.89 kHz operating frequency. If there are
interferences received you could choose the frequency, where
the detector is less noisy. The frequency switch positions are
designed to eliminate the radio-frequency interferences mainly
in competition hunting or when searching in close proximity to
another detector with a similar operating frequency. If there is
an other detector with the same frequency, to operate both
detectors normally they should be operated on different frequencies.
Figure 9

FALSE SIGNALS AND SOLUTIONS
12
A false signal occurs when something sounds like a good target, but it is not.
These signals are produced by undesirable or discriminated targets like large
pieces of iron, hot rocks or by electrical pulse-type electromagnetic
interference. Your detector has a very good discrimination, but some bad
“targets” with similar electrical characteristics could fool it. Some items very
close to the search-coil could sound good, as well as large pieces of trash. The
experience is the best teacher. With more practice with your detector you’ll
soon learn how to distinguish the false signals. At first, when you get a good
response you’ll find that crossing over the target once or twice more the signal
would break up or completely disappear.
The sources of false signals could be:
- Electrical interference, caused by high voltage power lines, TV and radio
towers, electricity transformers, cells of mobile phone operators or other
detectors. Move farther away from the source, lower the sensitivity level.
Switch the high/low switch to the low position. The use of a smaller sized coil
is also a good solution.
- Highly mineralized soils (with high iron or salt content). In such
conditions reduce the sensitivity, increase the level of discrimination. If
searching in the all metal mode and with M ground position of the M
ground/A ground switch update the ground balance setting. The smaller
coils are possible solution.
- Extremely trashy areas may cause a lot of “chatter”. Increase the
discrimination level or reduce the sensitivity, switch the high/low switch to the
low position. In some trashy areas the smaller sized coil would be beneficial
for target separation.
- Metal Interference. The detector picks up metals above and on the side of
the search-coil, as well as beneath it. Be careful for your digging tool, metals in
shoes, and your coil cable hanging loose above the coil. Pay attention to be
away from railings, ferro-concrete poles, etc.

SEARCHCOILS
13
Your detector is equipped with the latest generation NEW SEF searchcoils
(symmetrical electromagnetic field coils). The Standard SEF coils are the best
performance coils. Compared to the Double D coils they have better ground
balance, more stable operation, better depth of penetration, better
pinpointing, more accurate target identification. The NEW SEF coils have
even better sensitivity, higher temperature stability, even better pinpointing.
Your detector standard package includes two of these coils - 9"x9" and
12"x12".
The 9"x9" is the most universal size of searchcoils, and it is hardly a
coincidence that almost all the detectors on the market are equipped with
such size of coil. This searchcoil has good sensitivity - to small and to bigger
sized targets. It is good for search of jewelry, coins, and relic hunting. It is
designed for best all-arround performance, in all types of detecting.
The smaller search coils give better target separation, i.e. more distinct
target response for metal objects buried closely together, which is very useful
when hunting trashy areas. At the moment as accessory coils are offered the
6" DD closed solid design coil and the 8"x6"SEF coil.
The 12"x12" coil is recommended for TH-ers who has already accumulated
experience in operating the detector. Its advantages towards the 9x9" coil are
that it has a better sensitivity and depth, especially for the bigger sized targets,
this searchcoil covers more ground. As disadvantages could be given its more
nervous operation in mineralized and trashy grounds, slightly erratic
operation on salt wet sands. As every bigger sized coil it groups targets
situated closely together.
No one search coil is better than all the rest. Selecting the right searchcoil
depends on the factors such as what are you searching for and search site
conditions.
All the search coils are light for their sizes, very well electrostatic shielded,
resistant to shocks and shakes, perfectly balanced and waterproof.
They are all compatible and interchangeable, easy to mount and require no
special tools.
Coil covers
Your searchcoils come standardly with coil covers. They are very useful to
protect your searchcoil at any time, and we would warmly recommend their
constant use.

BATTERIES
14
Your detector is standardly powered by 4 Ni-MH batteries, size AA
(R6),1800 mAh, which allow you to use the detector for 20-30 hours. The time
of use depends on how many signals your detector will locate and process
and whether you use headphones. The use of headphones will increase the
time of battery use.
As we have already mentioned, when turning the detector on the led
indicator will light in alternating green and red lights for a while, and then for a
second with green light, if your batteries are charged. If this light is red, you
should take out and recharge (if the batteries are Ni-MH) or replace (if the
batteries are alkaline) the batteries.
If in the process of operation of the detector the batteries are discharged
on every 20 seconds the low battery indicator will blink in red, and you’ll hear
warning audio signal. If you do not turn off the detector, this will continue until
the batteries are fully discharged (not too long time), which is not desirable,
because is extremely harmful for the batteries themselves.
To remove the batteries, make the following:
Remove the lid of the battery compartment on the backside of the control
box. You’ll see the batteries. In the bottom of the compartment are described
schematically 4 batteries and the direction of their location.
If the batteries are rechargeable, put them into the charger, of course,
keeping in mind the direction of their position in the charger. For a full charge
of your 1800 mAh batteries you’ll need about 15 hours. After the batteries are
recharged, or if you are going to use new alkaline batteries, put them into the
battery compartment, making certain to match the battery polarity with the
markings indicated on the bottom of the compartment..
WARNING: Be very careful to install correctly the batteries in the battery
compartment.

SPECIFICATIONS
15
Operating Frequency ................... Freq.1 - 13.89 kHz; Freq.2 - 13.74 kHz
Audio Frequency ............................................................................. 570 Hz
Weight (with batteries included)....................................................... 1460 g
Length (extended) ................................................................. 51"(1300 mm)
(unextended).............................................................. 41"(1050 mm)
Standard Searchcoils ................SEF Pro......... 9" X 9" (230mm X 230mm)
SEF Pro .......12" X 12"(305mm X 305mm)
Optional Searchcoils: ................ Round ................................... 6" (150mm)
SEF Pro ............8" X 6"(203mm X 152mm)
Headphones ................................Impedance ......................... 8 - 32 Ohms
Mono / Stereo Jack .......................... 1/4"(6.3mm)
Batteries ....................... Standard ....................... Four Ni-MH , 1800 mAh
Optional ................... Four 1.5V, size AA, Alkaline
Ni-MH battery Life .................................................................. 20 - 30 hours
Low Battery Alert ................................................ Automatic LED and Audio
Ground Rejection .............................................................................. AUTO
Manual Ground Adjust
Search Modes ...................................................................... Discrimination
All Metals/Ground Adjust Enable
Controls .................................ON/OFF sens., disc., GND adjust, threshold
Switches .......... high/low, freq.1/freq.2, M ground/A ground, all metal/disc.
Warranty ............................ Control Box ....................................... 2 years
Searchcoils ......................................... 1 year
Patents ..................................................................................... BG 817 Y1

MAINTENANCE
16
Your detector is a high quality electronic instrument. Though ruggedly
constructed and designed to withstand the normal treasure hunting demands
proper care is essential.
Operate your detector as recommended in this instruction manual.
Remove the batteries from the detector if you are not going to use it for
extended period of time. This will prevent the detector from batteries leakage
damage.
Sweep the searchcoil carefully and avoid hitting it against rocks, trees
and other hard surfaces.
The use of coil cover is highly recommended to protect the searchcoil
from abrasion.
The searchcoil is waterproof, but the electronics are not. Always prevent
any moisture or water from entering the control box of the detector.
Protect your detector from dust, moisture, and extreme temperatures.
Keep it clean and dry and avoid getting sand and grit into the shafts or the
tightening nuts.
Do not use solvents to clean the detector.
Keep the coil cable properly wound around the shaft and protect it.
Floppy, pinched cable may short, causing erratic noises or unnecessary
replacement of the searchcoil.
Do not attempt to modify or repair the detector’s electronics as this will
void your detector’s warranty.

AIR TEST RESULTS
17
The table shows you the results of comparative air tests between your
detector with the standard 9"X9" searchcoil and other VLF detectors of
leading metal detectors manufacturers.
Please, note that with the 9"X9" coil your detector significantly exceeds as
sensitivity all the other tested detectors. For some of the targets the
parameter of your detector is even 60% better. Note that your detector has
equally good sensitivity to very small and to very big sized targets, to very low
and to very high conductivity targets. Even with the optional 6" coil your
detector exceeds the remaining detectors.
The tests are made at one and the same time (in one and the same
meteorological conditions), on the field, away from the electromagnetic
disturbances of the built up area.
The speed of passing the targets in front of the coil of each detector is a
normal (mean) speed. The same speed is the most appropriate one for
treasure hunting. With increase of the sweep speed the parameters of all
detectors are proportionally increased, but this is not realistic during treasure
hunting.
The tests are made in Discrimination mode of operation of the detectors.
All the detectors are with increased sensitivity level to the point where they
remain stable.
The test was made by an independent professional treasure hunter.

Note: Each of the test targets could be seen on Picture 1.
18
EDS PLUS

19