NRG 150 - Mikron Metal detectors
Contents
1. NRG 150 working in dynamic regime searching metal objects is made by moving search coil toward ground surface fig 2 fig 3 Xk Lit Wrong Correct Fig 3 Start swinging the search coil in wide sweeps that overlap each other as near to the ground surface as possible Fig 2 The search coil should not touch the ground during your sweep The pole length should be adjusted to allow this without having to lift the detector with your elbow or shoulder The search coil should rest about one inch above the ground while you are standing erect The angle of the search coil should allow the bottom to be parallel to the ground If you experience false signals or constant beeping or popping and you are not near common sources of electrical interference push Auto GEB to switch on automatic balancing and or reduce Threshold counterclockwise slightly and try again As a search coil is swept over the ground ignore the display and concentrate on the sound the detector makes As a search coil is passed over a metal that is likely iron trash the sound will be low tone 245Hz Once familiar with the sound typical iron produce an operator may pass over such targets without consulting the display indication and continue searching saving more time As a search coil is passed over a metal that is likely good high tone sound will be heard 700Hz A good target typically produce a longer more solid sound no partial signals and mixed signals2. gt If working in or near water or if there is a possibility of rain use a protective weather resistant pouch or plastic bag to cover the control housing Make sure it can breathe in order to ensure against condensation buildup inside After each use clean the detector with a soft cloth to remove dust moisture or other contaminants gt When transporting the detector in a car during hot weather store it on the floor of the passenger compartment if possible Using a carry bag gives additional protection In any case never allow the detector to roll around unprotected in the trunk or back of a pickup truck Protect your detector from dust moisture and extreme temperatures during storage gt Treat your detector as you would any sensitive electronic instrument Though ruggedly constructed and designed to withstand the demands of normal treasure hunting proper care is essential 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 mikronbg com
3. can switch on IRON MASK mode Indication that you will see the display the first segment will be blacked out with the symbol IRON MASK When you switch on this mode will be disabled low tone on detection of a magnetic metal This mode is preferable when working in areas heavily contaminated with iron trash IRON MASK symbol VDI cursor Note If the potentiometer DISC is reduced to a minimum the detector will detect ferrous magnetic objects with high tones but will not display an indication of the type of metal as it would be the first segment and in this mode it is indicated by a symbol for IRON MASK Therefore it is preferable when use mode IRON MASK potentiometer DISC to be increased to at least position FOIL or more When switch off mode IRON MASK i e return the trigger in the middle position the detector will work again in the Two Tone mode high tone for non ferrous metals and low tone for ferrous metals At the same time will disappear and the symbol for IRON MASK on the first line of the display 5 Searching NRG 150 can work with 2 search coils 27 cm and 36 cm Large 36cm search coils are used to detect large and bulky metal objects deeply buried to about 1 2 to 1 5 m maximum and a small probe is used to detect and precisely locate single coin depth of about 30 40cm or a large metal objects at depths up to 1 to 1 20 m depending on size Also smaller coils can be used in bushes bumpy and uncomfortable
4. will be disconnected when you connect a headphone 9 Charging storage batteries and indications for their status If a light Low battery appears while using the detector that means you have to stop using it and recharge the batteries as follows put the jack of the charge device into CHARGE nest and place the device into electric net of 220V The charging is automatic and begins when the device is SWITCHED OFF and you plug the charger into the charging jack of the back panel of the oo 99 c6 29 device The jack cage is and the middle terminal is Charging depending on the level of discharge of the batteries It s not necessary to keep eyes on charge device because it is supplied with automatic turn off and batteries couldn t be damaged no matter how long they will stay in the charge device The charging continues till the moment when the batteries reach their maximum capacity When reaching their full capacity the red light on the charger will not light any more When they are ready pull the device out of the electric net and unplug the jack out of the CHARGE NOTE Don t unplug the charger if charge process is not finished 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 10 Possible problems during exploi
5. MIKRON NRG 150 User s operating manual Made in Bulgaria 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 NRG 150 is shipped with these parts Upper Pole Assembly fully assembled including upper pole stem with handle grip Middle pole assembly with pole lock lower pole made of plastic in order to not disturb the work of the coil 27 cm DD search coil electrical set box made of extremely strong plastic including 8 AA alkaline batteries or 10 rechargeable accumulators NiMH 1 2V 2800mAh 220V automatic charger Operation user s manual Warranty card If any of these items are missing immediately inform us or our authorized dealer where you purchased your detector Assembling the NRG150 is simple and you don t need any special tools Just mount the search coil on the lower pole assembly connect the pole assemblies together adjust the pole length wrap the excess cable around the pole and plug the cable into the control unit 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 CONTROLS N
6. RG 150 control panel 4 6 2 8 IRON 6 COINS 0 40 123456789 GROUND BALANCE Se NRG 150 eS PHONES SAT SPEED AUTO 1 wa LIGHT M 8 r Sue 10 0 0 THRESHOLD ON VOLUME GROUND BALANCE eliminates the signals of the ground mineralization DISC regulates degree of elimination of iron and unwanted objects THRESHOLD used for adjusting sound level and regulates depth of ON VOLUME switches on the detector and adjust sound level SAT SPEED Self Adjustment Threshold SAT Speed adjustable rate beep on detection of metal objects Button Auto GEB turns on and off automatic ground balance Button LIGHT switch on and switch off LCD backlit Jack Phones used for head phones one 3 5mm on the front panel and one 6 3mm on the bottom side of the box 1 Assembling of the device 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 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 The coil cable must be wind up tightly around the bearing rod and is switched to the socket of the box with electronic Upon switching of the 3 cable of the co
7. VDI numbers 0 99 on the bottom row on the screen VDI VDI Visual Discrimination Indication is a digital indication which depends on the metal targets exact alloy size and shape The reference label below the display provides a comparison of known targets and their common VDI numbers Different metal targets may share the same VDI numbers based 8 on their electrical characteristics VDI numbers from 0 to 99 are available and cover the entire range of alloys and sizes Whenever detection of metal objects initially concentrate on the sound signal so you can better determine the exact location of the object 3 DISC knob is used to eliminate any target that you do not want the detector to audibly respond to If you need to eliminate more ferrous metals over the ground the DISC control must be set in a position over Rings or Coins If you come upon non ferrous 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 DISC control is in low position Iron every ferrous object will be signalized with high tone like non ferrous If the soil is too mineralized we recommend the Foil or Tron position Some trash metals such as pieces of lead tin cannikin or pot metal will produce a good sound regardless of the DISC position 4 IRON MASK mode With the trigger on the hand grip in the forward position you
8. e You can help avoid this from happening to your detector by following these basic care and protection guidelines Operate your detector exactly as recommended in this Operator Instruction Manual The search coil cable is hard wired to the search coil and protected by a strain relief It is very important that the strain relief remains intact and should never be adjusted or tampered with Keep cables properly wound around the pole stems and protect them during use Floppy pinched or cables that become snagged during use may short causing erratic noises or unnecessary replacement of the search coil Sweep the search coil carefully especially when using around rocks and building foundations Avoid hitting the search coil against hard solid objects and surfaces Keep your search coil slightly off of the ground during the sweep especially when using in gravel or hard rocky dirt Remove and clean out scuff covers periodically to avoid buildup of mineralized dirt particles which will affect performance gt The search coil is waterproof and can be submerged in either fresh or salt water After the search coil is used in salt water rinse it and the lower stem assembly well with fresh water to prevent corrosion of the metal parts The search coil is waterproof but the electronics are not so always prevent any moisture or water from entering the control housing and never allow the cable connector to become submerged in water
9. et will be directly below the coil center at this response time fig 4 Then turn 90 degrees and sweep the coil side to side noting the center from this new direction X marks the spot that you need to dig Where the two loudest beep intersect is the center of the target Release the toggle switch to the center position before continue to search You can practice with a coin on top of the ground to become acquainted with this technique Target 7 The detection depth depends on the following fig 4 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 type of detecting coil The bigger the diameter of the coil 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
10. fe or a screwdriver in the sight holes 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 4 The device works only with headset and when working with amplifier you can not hear a sound Usually that happens when the headset jack is damaged In that case contact the service station office of the company manufacturer or the local distributor to change the jack 5 Batteries charge quickly and after that during the working process they go dead quickly Usually that happens when the batteries are really old and need replacement Contact the service station office of the company manufacturer or the local distributor for change of the storage batteries 11 GUARANTEE The detector NRG 150 is offered with 36months of guarantee of electronics labor and materials used for harms which are not caused on purpose or irresponsibly The warranty does not cover rechargeable batteries We can upkeep your device after period of guarantee if it is necessary 12 Protecting your investment Often detectorists are disappointed when their new detector slowly becomes less and less responsive and seems to have lost some of its original peak performanc
11. high low tone Once a smooth solid signal is heard sweep the search coil over the target several times and look at the display indication When a metal target is detected probable target type will be indicated at the top of the LCD screen The Upper Scale where the VDI cursor is illuminated when hunting consists of eight 8 graphical segments for more precise Target ID and discrimination First segment indicates the metal is likely iron or steel such a nails steel bottle cap or iron relic At the same time the sound is low tone if not switch on IRON MASK mode Dig if only iron steel is of interest Second segment indicates of small foils However some very small gold jewelry can also be indicated by this segment You may want to dig this target in areas where small gold jewelries are suspected Third segment indicates small gold coins rings medium jewelry and small ancient coins The most desired metal gold usually displayed in this segment However large and solid foils can be indicated by this segment too Fourth segment indicates most likely old bronze coins medium to larger gold jewelry or gold coins However aluminum pull tab can also be indicated by this segment Fifth segment indicates medium copper or zinc coin or large aluminum screw caps Sometimes a large gold rings or coins can be indicated by this segment Sixth and seventh segment most often indicates small silver coins also big bronze or coppe
12. il to the socket on the box 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 The searching coil is approached to the surface of earth by paying attention to avoid presence of metals within its range NOTE Detector may not work as expected indoors due to the high degree of metals used in modern construction It is best to tune and practice outdoors to ensure stable predictable results 2 Switch on and work with NRG 150 1 Turn the ON VOLUME knob to ON and adjust preference volume of sound The display will momentarily show an opening screen which lists the software version 2 Setting the THRESHOLD While holding the detector a few feet above ground and away from any metal object slowly turn the THRESHOLD knob until you hear a very slight audio tone through the speaker or headphones This is the optimum set point for the THRESHOLD If the search coil is not in motion and not close to metal the detector should be silent A light buzz adjustment is recommended to insure optimum depth and maximum performance As THRESHOLD is in low position as low is sensitivity Too low of a threshold setting may cause very weak signals to not be heard Too high of a thresho
13. in it Best results are received when the soil is dry Freshly buried targets will not produce the normal depth and discrimination results of targets that have been naturally lost and settled in the ground It may take a number of years for freshly buried targets to respond at true depths and discriminate accurately The best way to determine true detection depth is to use real search conditions To reduce false signals when searching in a very trashy ground scan only a small area at a time using slow short overlapping sweeps Keep the search coil moving at a comfortable rate If you walk too fast you can t overlap yours sweeps and you will miss a lot of ground Also if you sweep too fast you will lose sensitivity and miss the deep targets 8 Using a headphone You should always use a headphone whenever you search with your metal detector Headphone is especially 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 ears while masking outside noise interferences You shell be amazed at how much better you can hear the detector signals with the headphone than you can with the speaker alone Using head phones also save battery power To connect a headphone to the detector insert the 3 5mm headphone jack into the Phones on the front panel or 6 3mm headphone jack into the socket on the bottom of the box NOTE The detector internal speaker
14. ld setting may cause operating instability 3 You can work in manual or in automatic GROUND BALANCE modes In manual ground balance mode Search for and select a clear piece of ground or sand that does not contain any metallic targets With the coil elevated at least waist high and away from any metallic target slowly adjust the THRESHOLD control until a very faint audio threshold signal is heard Lower the search coil to within one inch of the ground surface while listening to the threshold audio signal If the threshold signal is high tone the GROUND BALANCE control needs to be decreased rotate counter clockwise If the threshold signal is low tone the GROUND BALANCE control needs to be increased rotate clockwise Keep repeating this step until threshold signal is the same within one inch of the ground as it is in the air Once this is accomplished the detector is properly ground balanced When the ground mineralization is rejected the detector can see deeper targets and is less susceptible to ground interference While balancing the detector you have to be sure there are no metal objects around the search coil If it seems difficult or impossible to get little change in the steady threshold as the coil is lowered you may be attempting to tone on top of a peace of metal Move to a different spot on the ground and repeat balancing Once the initial ground balance is completed the detector is ready to be
15. r coins Eight segment almost always indicates high purity silver big silver coins but sometimes old big bronze coins and other items of bronze without impurity Each of the 8 segments operates independently It can t be displayed simultaneously two or more segments Often when detecting very old rusty iron objects and some iron with impurities of nonferrous metal such as galvanized steel or iron bottle caps indication on the l st row jumps from the first to the last segment and vice versa This is always a signal that is detected magnetic object Such items of dubious and mixed signals more accurately identified as iron if you detect with the edge of a search coil than if you are just below the center of the coil Highly mineralized soils have a greater impact on the detector and thus the accuracy of VDI In high mineralization detected signals can be changed with graphical and digital indication than when tested in air or in low mineralized or sandy soil Usually such places VDI is shifted to the left For example if one normal metal object is detected with the sign of the fourth or fifth segment if buried in such mineralized ground indication may be the second or third segment So whenever in doubt of the display check the detected object and so over time you will learn to some extent to recognize what has detected metal detector When a metal target is detected along with the VDI cursor of the first row you can see their common
16. r or decrease significantly if you raise the coil while if the object is large even the deep signal it will hardly change if you raise the coil Also note the duration and frequency of the sound mode when plugged PinPoint VCO 6 Pinpointing a Target A good method for pinpointing is X ing the target with the search coil Remember that the target s response sound is always greatest when the target is directly under the center of the search coil IRON PI MASK VCO 3 position switch To X a target squeeze and hold the trigger located on the handle and sweep the search coil over the target from side to side and then from front to back until you can identify the center of the X the spot on the ground where the target response sound is the greatest Use loudest tone display level indication bars on the 15t row to indicate targets exact center Pinpointing a target is probably best done by X ing as well Remember 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 remember that the search coil must always be moving slightly for target detection Another easy method is to sweep the coil from side to side across the target in very short sweeps as you slowly move forward and backward across the target Slow down the sweep rate and shorten the sweeps until you just barely get a response at one spot The targ
17. search location where it is impossible to use large coils The greater the size of the search coil the greater will be the depth of detection but with the increase of the coil size will be hard to detect very small metal objects The difference in depth of detection using large coils is appreciable for large metal objects such as a large metal object is the greater the difference in depth of detection between large and small search coils I e if the difference in depth of detection of large and small coils for medium coin is 3 4cm the difference in depth of detection as metal cup or pot of coins is about 15 cm Therefore the use of large coils makes sense if you look bulky items and it is important to find the best possible depth Disadvantage of larger sensors is their size require a flat and clean places to look In contaminated areas with lots of scrap metal is advisable to use smaller probes To test for studying the characteristics of the device you can make polygon where buried various metal objects at different depths Also you can put to the 10 ground sizes metal objects Move the search coil at different heights above them and you will learn to evaluate the size and depth of the metal object depending on the intensity and duration of the sound After a while you will learn to recognize objects that lie just below the surface or at depth For example the signal from a small object located near the surface of the earth will disappea
18. tation of NRG 150 1 When switching it on you can not hear a sound no any indication on the LCD that the device is switched on It might indicate for storage batteries are dead usually after a long period of time Charge the batteries with the charger If the problem is not solved contact the service station office of the company manufacturer or the local distributor the accumulator block consists of 10 elements 1 2V 2800mAh connected in series If just one of them is damaged the connection between them will be destroyed and practically the device will be left without power supply 2 The working depth is significantly shallower than the normal It might indicate for storage batteries could be dead 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 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 sight holes in the jack of the back panel of the device Put something sharp like a kni
19. used ali 220 Ft al ent tat Fig 1 A proper adjustment of the manual ground balance will enable a little more depth over automatic ground balance However an improper adjustment of the manual ground balance could and in all probability decrease the depth performance of the metal detector greatly In automatic ground balance mode push the button Auto GEB and you will hear a beep The GROUND BALANCE knob do not have to be turned on at that time If you sweep the search coil over non ferrous metals gold silver copper bronze a high toned sound can be heard and if you sweep over ferrous metals a low sound is heard Without the ability to cancel ground mineralization a metal detector could respond to mineralization as if it where a good target Always try to manual balance to the ground surface and if it seem difficult or impossible to get little change in a steady threshold as coil is lowered we recommend use Auto GEB regime Use Auto GEB when you find yourself in a Situation that does not allow manual GROUND BALANCE to be adjusted correctly The ground conditions are really bad with mineralized ground hot rocks and iron trash so your sweep speed must be reduced for best results Auto GEB is recommended when searching in wet salt sand too NOTE Under some severe mineral conditions ground balancing may not be possible The best result you will get if searching when the soil is dry Fig 2
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