REX RELICSCAN User manual

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REX TM Metal Detectors
“R E L I C S C A N”
Professional pulse induction metal detector
User’s guide
________________________________www.rexmetaldetectors.com_________________________________
made in Bulgaria

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In order to use the device for a maximum long time and without problems, as well as to
be able to use all of its options, please read carefully the whole instruction manual and
observe the directions in it.
The standard set of Relicscan comprises:
- searching frame of 1x1m or 1,20x1,20m.
- control unit with built in accumulators;
- automatic charger for 220 V;
- detailed instruction manual for operation.
If any of these items are missing, immediately inform us, or our autorized
dealer where you purchased your detector.
Relicscan has the following parts for control:
- “ON / THRESHOLD” – switches on the detector and adjust threshold level.
Rotate the controller counter-clockwise to low position to avoid inter ference.
Clockwise rotate the controller to have high sensitivity.
- “SENSISTIVITY” – used to adjust the sensitivity. Rotate the controller
clockwise to have a high s ensitivity. Rotate it counter-clockwise to lower the
sensitivity.
- “SIGNAL DELAY” – sampling delay control knob.
- “DISC / NOISE” – used to adjust the discrimination in DISC mode or to
reduce electromagnetic interference in ALL METAL mode.
- Switch “ALL MET AL / DISC” - selecting the operating mode - “ ALL METAL“
or “DISC”
- Button " AUTO TUNE" – automatic setting of the d evice to ground conditio ns
of terrain where it works.
1. Assembling of the device:
Assembling the Relicscan is simple and you don’t need any special tools.
When use the round coil 14” (36cm.) or 18” (45cm.): The bearing rod is assembled by
inserting of the lower part into the upper one. Choose the desired length of the whole
construction and the fixing clamp is tightened between both parts of the bearing rod. The

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lower part of the bearing rod is put with the opening between the ears of the coil and the
plastic bolt is tightened by choosing the position of the coil to be parallel to the ground
surface. Don't over-tighten the plastic bolt and nut to not damage the threading of the bolt!
The coil cable is wind up tightly around the bearing rod and is switched to the terminal of the
monitor unit. Upon switching of the cable of the coil to the monitor unit, tighten the well the
metal nut of the coupling to the terminal of the box. Upon switching off, unscrew the nut
completely and pull out the coupling without pulling or twisting the cable of the coil. This way,
you will prevent the cable and the conductors in it from breakdown or short circuit. Finally
adjust search coil angle to your preference and you are ready.
NOTE: Do not allow the cable to flop loosely over the search coil. Since the detector is
sensitive enough to „see“ the tiny wires in the cable, a floppy cable can cause false
signals as the search coil senses the moving wires.
When use the search frames 1x1m. or bigger: The search frame should be held
approximately 4 to 6 inch (10 to 15cm.) to ground surface while searching. Do not allow
one end of the frame to be higher than the other. Make sure that no large metal objects are
close to the search frame for initial adjustment. Also, check your shoes or boots since most of
them contain metal parts and you would receive a signal response any time you step near to
the coil.
In order to avoid interference of the metal parts of the electronic unit, be sure to carry the
Relicscan on the side of your body that is away from the search frame.
1. Turn on the detector:
Searching frame is assembled and is placed on the ground paying attention to the range and
there don't have to be any metal objects.
Turn on the detector by rotating “THRESHOLD” knob clockwise to "ON" position and you will
see on the 2nd row on the display „ALL METAL“ or „DISC“, depending on the position of the
switch “ALL METAL / DISC”.
1st row of the display is graphical indicator of the level for more comfortable tracking of the
changes in the signal, also indicat or of the state of battery.

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2. Working with the device in ALL METAL mode:
Set the switch “ALL METAL / DISC” in position ALL METAL. Set the SENSITIVITY knob
to position 8, SIGNAL DELAY in the green sector, for example: 2, and DISC / NOISE also in
the green sector, for example 8.
Increase “THRESHOLD” until you hear audible pulse warning (pop). Click 2-4 sec AUTO
TUNE button and then relax. The sound disappears and graphic indicator of the first row is
returned to zero position. Hold for a few seconds the coil / frame above the ground. If the sound
signal is changed (increased), lower values of THRESHOLD carefully, until the sound signal
disappears or stays to hear the sound "pop" with a low frequency. The Relicscan is tuned and
ready to use on ALL METAL mode.
Should within the coil range there falls in a metal object, it provokes a signal which is depicted
on the level of the graphical indicator. At the same time a sound is heard with a frequency
which depends on the level of the signal. The more louder the signal, the more higher the
sound frequency. This is a very convenient mode for precise localization of the location of an
object.
To more precisely fix the location of the metal object in a strong and continuous signal can be
raised searching frame greater height above the ground. This will reduce the second reflected
signal from the metal object.
At a presence of de-balance, one has to press "AUTO TUNE", as at this, the searching coil
has to be close to the ground, at the distance of search to be.
Operating the Relicscan in the ALL METAL mode with SIGNAL DELAY knob in low positions
(0-3) will give you the greatest sensitivity of any object detected. In high positions (7-10), the
sensitivity to some ferrous and thin foils are reduced. Smaller iron objects as well as foils can
be completely eliminated. Also, you can minimize the effects due to highly mineralized soils
when using a higher SIGNAL DELAY positions. Holding the coil higher helps to reduce ground
effects as well.
If at work or in the initial setup, you hear irregular pulse sounds, they may be due to external
electromagnetic interference. In this case, turn potentiometer DISC / NOISE in a position where

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this pulsation will disappear or detector will work considerably stable. Other metal detectors,
land cables, railroad tracks, radio transmitters, electric motors, water pumps etc. produce
strong magnetic fields that can interfere. If there are electromag netic interference
from your searching area, lower the SENSITIVITY, or change the current
searching area. In areas with complicate soil condition, try to set the
SENSITIVITY and THRESHOLD to proper position. Don’t set the
SENSITIVITY and THRESHOLD to high position. Or you’ll get a fal se result.
Also, low sensitivity usually used, when a large object is detected at a small depth in earth.
Then the signal is continuous in order to determine the exact place of the object it is more
convenient to use low sensitivity. Thus the signal from the detected object becomes much
shorter.
“Relicscan” can sometimes react by small objects such as big coins or large caps, if they are
on the earth surface and within just pass over them, but then hear a short sound of a double
crossing of the two arms of the frame over the subject search!
“Relicscan” work in switching mode with very low frequency - 90Hz, (same coil at one time
broadcast, a recorded following the adoption of a secondary object signal) searching is
necessary framework to move relatively slowly over the ground to enable to achieve good
depth of search. Should not be run when searching with the detector or to go very quickly to
prevent loss of depth!
3. Working with the device in DISC mode:
Set the switch “ALL METAL / DISC” in DISC position and you will see on the 2nd row
on the display „DISC“. Set the SIGNAL DELAY in the red sector, for example: 8, and DISC /
NOISE also in the red sector, for example 2.
Discrimination starts working at levels 5 of SIGNAL DELAY and DISC / NOISE, having
retained the maximum depth of work. As more SIGNAL DELAY increases and decreases
DISC, the more effective it discrimination of metal objects, but at the same time reduces the
depth of search. In position of SIGNAL DELAY - 10 and DISC - 0, it can be about 40 % less
than the maximum depth, but at the same time can be eliminated large iron (magnetic) objects.
You can set your preference discrimination as to what extent be rejected iron (magnetic)
objects. Recommended to work as SIGNAL DELAY is 8 and the DISC / NOISE is 2 (on the red

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line between the two potentiometers). In this case, loss of depth is not as tangible, while
successfully eliminating most magnetic objects.
When the frame moves over a very large ferrous object, the sound level does not
change, and appears sound after the signal bypass the facility, which disappears gradually or
disappears quickly if the frame back over the object. Once passed, in what direction the sound
again appears, and gradually disappears. This is so-called reverse sound effect that occurs
only for large ferrous objects especially if the subject is not deep under the surface.
4.The detection depth depends on the following:
-size, shape and location of the object in the soil. The bigger the reflecting surface of the object
the deeper it is to be found;
-soil composition and mineralization level – the drier and more homogeneous the soil the easier
it will be to adapt the device and for the device to detect deeper. Under stones, dry sand or in
clay utensil, metals are easier to be found than in freshly dug out or damp soil.
-the longer the object has been in the soil the easier it will be to be found as a result of the good
contact with the soil. The longer the object has been in the ground the bigger the field is and
imitates bigger object!
-type of detecting coil. The bigger the diameter of the coill the deeper it will be able to detect
metals.
-operator's experience and skills.
You can do field tests by yourself using the device if you bury different metal objects in different
depth but you should leave them in the ground for at least 3 months. Thus the test results
will be more reliable. You should mind the soil type and the moisture composition in it. Best
results are received when the soil is dry.
“Relicscan” can work with different types of coils and frames 1x1m. frame / 1,25 x1,25m
/ 1,5 x 1,5m. / 2x2m. and smaller round coils - 36cm. and 45cm. Search frames are used for the
detection of large and bulky metal objects deeply buried to about 5-6 meters., A small round
coils is used to detect and accurately locate a small metal objects at depths up to 2m. Can also
be used in narrow and rough places where it is impossible to use the search frames.
As the larger the size of the search frame or coil, the greater will be the depth of detection.

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For testing and studying the characteristics of the detector, you can make polygon where you
can buried in the ground different metal objects at different depths. You can also place on the
surface of different sized metal objects, but are no less than 2m. from one another. Move
searching coil / frame of a different height above them and will learn to evaluate the size and
depth of metal objects, depending on the strength and duration of sound signal.
Move the frame slowly, about 10 - 15 cm. from the surface, listen the changes of sound and
watch the graphical indicator. After a while you will learn to recognize whether the object lies
just below the surface or in depth. For example, the signal from a small object located close to
the surface will disappear or decrease significantly in raising the frame, while if the object is
large, even and deep, almost its signal will not change if you raise a little searching frame.
Track and duration of sound signal.
Important: Do not forget to turn off the device when you finish searching. Otherwise the
battery will be completely discharged and may lose some capacity to recharge. Total
damage may also occur.
5. Battery charging and indications for their status.
“Relicscan” has a built-in accumulator battery 12V/2,2Ah, which is able to provide 15-18
hours of working process without any interruption depending on the type of the used search
coil. Bigger coils consume more power and thus the working time is shorter. The battery’s
status is shown on the first row on the right. When the battery voltage decreases below 12,0V
the indicator will be empty.
The charging is automatic and begins when the device is SWITCHED OFF and you plug the
charger into the charging jack “CHARGE” on the front panel of the device. The jack cage is “+”
and the middle terminal is “-”.The red LED on the charger indicates that the battery is charging.
If the battery is discharged, the led will be light poorly. The more charge, the bright light will be
led. Charging continues till the moment when the batteries reach their maximum capacity. Then
the charging automatically stoped and red LED on the charger will light very brightly and
indicates the battery is fully charged. When switch on the detector after the battery is fully
charged, the indicator on the status of the battery will be full.

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Always charge device's storage batteries ONLY with the paired chargers to it. Thus you
will prevent damages or confusion between “+” and “-” because the use of other
chargers or adaptors may lead to irretrievable damages in the batteries!
6. Possible problems during exploitation of “Relicscan”:
6.1. When switching it on you can not hear a sound, there is no information on the
display, no indication that the device is switched on. It might indicate for:
- Accumulator battery is dead (usually after a long period of time). Charge the battery
with the charger. If the problem is not solved contact the service-station (office) of the company
manufacturer or the local distributor.
6.2. The working depth is significantly shallower than the normal. It might indicate for:
- Accumulator battery could be discharged – pay attention to the shown for the battery
indicator. If it is empty, so the battery is discharged under 12V. Charge the batteries with the
automatic charger. If you can not solve the problem contact the service-station (office) of the
company manufacturer or the local distributor.
6.3. During detection the device does not work stable, makes strange sounds which are
not due to a metal detection. It might indicate for:
-irregular electromagnetic external interruptions.
-problems with the aerial cable – disconnected conductor, a shot circuit or bad connection in
the coupling.
It is possible after continuance work and many times of switching on and off the cable's
coupling to the jack box the contact between them to be destroyed. There are 2 terminals with
sightholes in the jack of the back panel of the device. Put something sharp like a knife or a
screwdriver in the sightholes and make them wider. Thus the coupling will fit better into the jack
which will improve the contact between them. It is possible in the presence of some kind of dirty
like dust or moisture to clean the terminals with cotton-wool and alcohol. If you can not solve
the problem contact the service-station (office) of the company manufacturer or the local
distributor.
6.4. The device works only with headphones and when working with speaker you can not
hear a sound. Usually that happens when the headphone jack is damaged. In that case contact

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the service-station (office) of the company manufacturer or the local distributor to change the
jack.
6.5. The battery charge quickly and after that during the working process they go dead
quickly. Usually that happens when the battery is really old and need replacement. Contact the
service-station (office) of the company manufacturer or the local distributor for change of the
storage batteries.
In case that the Relicscan has been exposed to low temperatures, you should absolutey
avoid an abrupt warming. The condensation humidity can provoke a disturbance of function.
7. Using a headphone
You should always use a headphone whenever you search with your
metal detector. Headphone is especiall y useful in noisy area, such us the
beach and rear city area. It enhances audio perception by bringing the sound
directly to your to your ear s while masking “outside” noise interferences. You
shell be amazed at how much b etter you can hear the det ector signals with
the headpho ne than you can with the speaker alone. Using head phones also
save battery po wer.
To connect a headphone to the detector, insert the headphone jack into
the “PHONE” on the front panel.
NOTE: The detector internal speaker will be disconnected when you
connect a headphone.
8. Guarantee
The detector Relicscan is offered with 2 years of guarantee of electronics, labor and
materials used, for harms which are not caused on purpose or irresponsibly.
We can upkeep your device after period of guarantee if it is necessary.
The Manufacturer (trader) does not bear any responsibility if you use the device in violation of
the law, on archeological or forbidden for search places as well as on private property without
the knowledge or the permission of the owner.
Protect the environment and always fill back in the holes you have dugged out!
www.rexmetaldetectors.com