Mikron NRG100 Operation instructions

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NRG100
User’s operating manual
2008

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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.
Your NR G100 was shipped w ith these parts:
- Upper Pole Assembl y – fully assembled, includin g upper pole stem with
handle grip
- Middle pole assembl y with pole loc k;
- lower pole - made of plastic in orde r to not disturb the work of the coil;
- 22x32c m DD search coil;
- electrical set box – made of extre mely strong plastic;
- batter y bo x including 10 A A batteri es 1,2V/10 00 mAh;
- 220V automatic charger;
- Operation instruction manua l.
Warranty card
If an y of these items are missing, i mmediatel y inform us, or autorized dealer
where you purchased your detector.
CONTROLS: Th e N R G100 control panel:
- “ON / V OLUME ” – switche s on the detector and adjus t sound lev el
- “GND BALANCE” – elimi nates inf luence of the soil
- “DISCR” – regulates degree of elimi nation of iron objects. User can adjust
the controll er to re ject undesire d metal.

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- “THRESHOLD” – used f or adjusting sound leve l and regulates dep th of .
Rotate the c ontroller counter-clockwise to low positio n to avoid i nterference.
Clockwise rotate t he controller to have high sensitivit y
- “MINERALIZA TION” - used for regulation of depth of mineraliz ed regions
- “Toggle sw itch” - Three operation modes are set by the Toggle switch on the
handle. Front position is f or “IRON MASK” mode; middle (neutral) pos ition is
for “Tw o Tone” mode; back position is for “VCO Pin Point”. For this setting,
user has to hold the toggle b y hand.
- “Battery low ” – blinking red light indicat or. Indicates lower tensi on of
batteries. When the batter y voltage is below 11.0V , “Battery low ” indicator
will light. At this time user has to cha rge the batter y.
- Jack “Phones” – used for head phones
1. Assembling of the device:
Assembling the N RG100 is simple and you don’t n eed any special too ls.
The bearin g rod i s asse mbled b y inse rting of the lowe r part into the upp er one.
Choose the desired length of the whole construction and the f ixing clamp i s
tightened betwee n both parts of the bearing rod. The lo wer part of the bearing
rod is put with the opening between the ears of the coil and the p lastic b olt is
tightened by cho o sing the position of the coil to be parallel to the ground
surface. Don't ove r-tighten the plastic bolt and nut. The coil cable is wind up
tightly around the bearing rod and is switched to the terminal of the monitor
unit. Upon switchi ng of the cable of the coil to the monitor unit, tighte n the
well the metal nut of the coupling to the ter minal of the box. Upon switching
off , unscrew the n ut completel y and pull out the coupling with out pulling or

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twisting the cable of the coil. This wa y, yo u will prevent the cable a nd the
conductors in it from breakdown or short circuit.
Finally adjust sear ch coil angl e to your pref erence and yo u are ready.
The searching coil is approached to the surface of earth by pa ying attention to
avoid prese nce of metals within its range.
NOTE: Do not allow the cable to f lop loosel y over the search coil. Sinc e the
detector is sensitiv e enough to „see“ the tin y wires in the cable, a f loppy cable
can cause false signals as the search coil senses the moving wires.
2. Sw itch on and w ork w ith NRG100 .
2.1. Turn the “O N / VO LUM E” k nob to “ON” and adjust pref erences
volume of sound.
2.2. Sett ing t he “ THRESHOLD” - While holding the detector a few feet
above groun d and awa y f ro m an y metal object, slow l y turn the “THR ESHOLD”
knob unti l you hear a very slight audio tone t hrough the speaker or headph ones.
This is the optimu m set-point for the “THRES H OLD”. A light “buzz”
adjustment is recommended to i nsure optimum depth and maxi mum
performance.
As “THRESHO LD” is in low position, as low is sensitivit y. T oo low of a
threshold setting may cause ver y weak signals to not be heard. Too hi gh of a
threshold setting ma y cause ope rating instabilit y.
2.3. You ca n work in manual or in automatic “GND BALANCE” regime:
- Wh en you switch on yo ur detect or from “ON / VOL UME”, the det ector start
in manu al ground balance regime.
Search for and select a clear piece of ground or sand that does not conta in an y
metallic target s. With the coil elev ated at least waist high and awa y from any
metallic target, slowl y a djust the THRESHO LD control until a ver y faint audio
threshold s ignal is heard.
Lower the search coil to within one- inch of the ground surface while listening
to the threshol d a udio signal. If the threshold signal is high tone, the “GND
BALANCE” control needs to be decreased (rotate co unter clockwise). If the
threshold signal i s low tone, the “GND BALA NCE ”control needs t o be
increased (rota te c lockwise). Keep repeating this st ep u ntil threshold sign al is

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the same with in one-inch of the ground as it is in the air. Once th is is
accomplished, the detector is properl y ground balanced.
Also, you can use the “MINERALIZATION” knob f or easy balancing and eliminate
of the ground interference.
When the ground mineralization is rejected, the detector can see deeper t argets,
and is less suscept ible to ground interf erence.
While balancing t he detector, you h ave to be sure there are no metal objects
around the search coil. If it seems di ff icult or impos sib le to get little cha nge in
the steady threshold as the coil is lowered, yo u ma y be atte mpti ng to tone on
top of a peace of metal. Move to a different spot on the ground and repeat
balancing.
2 - 20cm.


Fig. 1
In automatic ground balance regime: push the butt on “Auto GEB” a nd you
will hear a single sound.
-The, ”GND BA LA NCE” knob do n ot have to be turned on at that time!! If
you come upo n no n-f errous meta ls / gold, silver, copper, bronze/ a low-toned
sound can be heard; and if you co me upon ferrous metals a high sound is heard.
Without the a bility to cancel grou nd mineralization, a met al detector could
respond to mineral ization as if it where a good target.
Alwa ys tr y to balance in “MANU A L” regime , and if it seems dif ficult or
impossible to get little change in a stead y threshold as coil is lowered , we
recommend use “Auto GEB” regi me. Use “Aut o GEB” when you find you rself
in a situati on that does not allow “Auto GEB” to be a d justed correctl y.
N O T E : When sea rching in highl y mineralized area, the unit will sound e ven if
there’s no metal. In this case, yo u can lower the sensitivit y and set the
“THRESHOLD “ to low position, in crease the height between the search coil
and the ground until the f alse signal disappears. The ground conditions are
reall y bad with mineralized ground, hot rocks and iro n trash, so your sweep

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speed must be reduced for best result s. The best r esult yo u will get if searching
when the soil is dr y.
“Auto GEB” is rec ommended when searching in wet salt sand too.
Also, if there are interference from other instru ments or electrical cable or TV
or radio in yo ur searching area, lower the TH RESHOLD, or to c hange the
current searc hing area.
In areas with complicate soil condit ion, tr y to set the MINERA LI ZATION to
proper position . Don’t set the MINERALI ZATI ON to “LOW” position. Or
you’ll get a false result.
Fig.2
NRG100 wor king in d yna mic regi me - searc hing metal objects is made by
moving sea rch coil toward ground surface – fig.2, f ig.3
Wrong Correct
Fig.3
The search coil should not touch the ground during your sweep. The pole length
should be adjusted to allo w this without having to lift the detec tor with yo ur
elbow or sho ulder. The search coil should rest about on e inch above th e g round
while yo u are standing erect. The angle of the searc h coil should allo w the
bottom to be parall el to the gr ound.
3. “DISCR ” is us ed to eliminate any target that you do not want the
detector to a udibly respond to.

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The “FOIL” position is reco mmend ed f or most general purpose searching. In
this posi tion, the detector will provide a reject response to most iro n and s mall
foil and respond to most valuables inc luding jewelr y.
If you need to elimi nate foil over th e ground, the “DISCR” control must be set
in a p osition over “Rings ”. Positions “Rings” will r eject more trash metals
including aluminum pull tab s.
In “Coins” positi on nickels an d so me gold jewelr y will be rejected.
If you come upon non-f errous metals /gold, silver, copper, bronze/ a high sound
can be heard; and if you come upon ferrous metal a low sound is heard. If the
“DISCR” control i s in “Iron” po sition, ever y ferrous o bject will be signalized
with high tone (lik e non – f errous).
If the soil is too mineralized we recommend the “Bottle cap” position.
4. Pinpoi nting a T arget
A good method for pinpointing is "X-ing" the target with the search coil.
Squeezing and holding in the trigger on the grip accesses a “Pinpoi nt” mo de
that makes it muc h easier to sweep the search coil slowl y an d center dir ectl y
above the target. Use loude st tone, to indicate targets exact center. To "X" a
target, sweep the search coil over t he target from si de to side and not hin g the
side to side center. Then turn 90 degrees and sweep the coil side to sid e noting
the center f ro m this new dire ction. "X" marks the s po t that you need to dig.
You can practice with a coin on top of the ground to become acquainted with
this technique. The center of the X— the spot on the ground w here the target
response sound is the gre atest. Pinpointing a target is probabl y best do ne b y
"X-ing" a s well. Reme mber that the detector will beep just as the target passes
under the center of the search coil. Slowing the sweep speed down will help you
pick out the center of the X, but re member that the search coil must always b e
moving slightl y f o r target detec tion.
Another eas y meth od is to swee p the coil from side to side across the target in
ver y short sweeps as you slowl y move forward and backward across the t arget.
Slow down the sweep rate and shorten the sweeps unt il you jus t barel y get a
response at one spot. The target will be directl y below the coil center at this
response time – f ig.4

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fig.4
5. The detection d epth depends o n the follow ing:
- size, shape and location of the ob ject in the soil. The bigger the reflecting
surface of the object the deeper it is to be found;
-soil co mposition and mineralization level – the drier and more ho mogeneous
the soil the easier it will be to adapt the device an d for the device to detect
deeper. Under s tones, dr y sand or in cla y uten sil, metals are easier to be found
than in freshl y dug out or da mp soil.
-the longer t he object has been in the soil the easier it will be to be found as a
result of the good contact with the so il.
- type of detecting coil. The bigger the diameter of the c oil the deepe r it will be
able to detec t meta ls.
- operator’s experience and skills.
You can do f ield tests b y yourself us ing the device if you bur y diff erent metal
objects in diff erent depth but you should leave them in the ground for at least
3 months. Thus the test results will be mor e reliable. You should min d the soil
type and the moist ure composition in it. Best results ar e received when the soil
is dr y.
To reduce false signals when searc hing in a ver y trash y groun d, scan o nl y a
small area at a time using slow, shor t overlappin g sweeps.
Keep the searching coil moving at a comfortable rate. If you walk too fast, you
can’t overl ap your s sweeps and you will mis s a lot of g round. Also if you sweep
too f ast, yo u will lose sensitivit y and miss the d eep targets
6. Using a headphone
You shoul d alwa ys use a headphone whenever you sear ch with your metal
detector. Headp ho ne is especiall y us ef ul in noisy area, such us the beach and
rear city area. It e nhances audio per ception b y bringing the sound direct l y to

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your to your ears while ma sking “outside” noise interferences. You shell b e
amazed at how mu ch better you can hear the detector signals w ith the
headphone than yo u can with the sp eaker alone. Us ing head phones also save
batter y power.
To connect a headphone t o the detect or, insert the headphone ja ck in to the
“Phones” on the front panel.
NOTE: The detec tor internal speaker will be disconnected when you
connect a headpho ne.
7. Chargi ng stora ge batteries and indications for th e ir status.
If a light “Low battery” appears whi le using the detector that means you
have to stop using it and recharge the batteries as follo ws: put the jack of the
charge device into “CHARGE” nest and place the device into electric net of
220V.
The charging is automatic and be gi ns when the device is SWITCHED
OFF and you plug the charger into t he charging jack of the back panel of the
device. The jack cage is “-” and the middle ter minal is “+”.
Charging depend on the level of discharge of the batteries. It’s not necess ar y to
keep e yes o n char ge device, because it is supplied wit h automatic turn off and
batteries couldn’t be damaged no matter how long the y will sta y in the c harge
device. The char gi ng continues t ill the moment when the batterie s reach their
maximum capacit y. When reach their f ull capacit y the red light on the charger
will not li ght an y more.
When the y are rea dy pull the devi ce out of the electric net and unplug the jack
out of the “CHAR GE”
NOTE: Don’t unplug the charg e r if c harge process is not finished.
Alw ay s charge de vice's st orage batteries O NLY w ith the paired chargers to
it. Thus you will prevent damages or c onfusion betw een “+” and “-” because
the use of other chargers or adapto rs, may lead to irretrievable damages in
the batterie s!

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8. Possibl e prob le ms during exploit ation of “NRG 1 00”:
1.When switching it on you can not hear a sound, no indication that the
device is switched on. It might indica te for:
-storage batteries are dead (usuall y af ter a long period of time). Charge the
batteries with the charger. If the problem is not solved contact th e service-
station (off ice) of the co mpan y manuf acturer or the loca l distributor.
-the accumulator block consists of 10 elements 1,2V / 1000 mAh con nec ted in
series. If just one of them is damaged the connectio n between them will be
destro yed a nd practicall y the d evice will be lef t without power suppl y.
2. The working depth is sig nificantl y shallower than the normal. It mig ht
indicate for:
- storage batteries could be dea d – charge the ba tteries with the automat ic
charger. If yo u can not solve the prob lem contact the service-station (off ice) of
the compan y manuf acturer or the loca l distributor.
3. During detec tio n the device does not work stable, makes strange sounds
which are not due t o a metal detection. It might indicate f or:
- irregular electroma gnetic ex ternal interruptions.
- problems wit h th e aerial cable – disconnected conductor, a shot circuit or bad
connection in the coupling.
It is possible after continuance w ork and ma n y times o f switching on and
off the cable's coupling to the jack box the contact between the m to be
destro yed. There are 2 terminals with sight holes in th e jack of the back panel
of the device. Put something s harp like a knife or a screwdriver i n the sight
holes and ma ke t he m wider. T hus the coupling will fit better into the jack
which will i mprov e the contact between the m. It is possible in the presen ce of
so me kind of dirt y like dust or moisture to clean the terminals wi th cotto n-wool
and alcoho l. If you can no t solve the prob le m con tact the se rvice-station
(office) of the compan y manufacturer or the local distributor.
4. The device works onl y with headset and when working with a mplifier
you can not hear a sound. Usually tha t happens when the headset j ack is
da maged. In that case co ntact t he service-st ation (off ice) of the company
manufacturer or the local distr ibutor to change the jack.