English - Kellyco Metal Detectors
Contents
1. You do not need to confirm or exit the menu to save the changes New values will take effect immediately When you select the brightness option in the menu the backlight will turn on and number 88 will appear on the numeric display This way the user can see the correct brightness level on screen and adjust it accordingly If you change the language of the device to a foreign language by mistake the text on screen may make no sense for you Therefore language is placed as the last option in the menu In such a case go to the last option and select your own language When you press and hold the menu switches the menu options and values will change more rapidly Disabled menu options that cannot be changed by the user will appear grayed out The disabled option may be active in another mode For example ID Masking appears disabled in the General Search mode but active in other modes NOKTA DETECTORS www noktadetectors com FORS Page 14 SEARCH MODES GENERAL SEARCH MODE GEN Sometimes referred to as the All Metal mode this is the deepest mode of the device Different than the other modes this mode has a constant threshold sound in the background that enables the user to use his her own judgment In the General Search mode the device will detect all targets metal high mineralized rocks etc without discrimination The ID of the detected target will be displayed on the screen except for negative rocks2. www noktadetectors Nokta INTRODUCTION Thank you for choosing and purchasing our Nokta FORS CoRe detector FORS CoRe developed by Nokta s expert engineering team experienced in metal detection is a professional metal detector ideal for coins and relics Manufacturing high tech metal detectors since 2001 Nokta Detectors has played a key role in the development of this sector Nokta Engineering is particularly known for its technological know how and professional staff Seeking to create different kind of technology Nokta Detectors offers both high guality products and services to its consumers all around the world Nokta Detectors has been operating under the principle that environmental and community responsibility customer satisfaction and insistence on high guality are of the utmost importance Nokta Detectors aims to remain a leading pioneer in its sector winning the trust of its consumers and always being the preferred choice for metal detecting Oe E Nokta DETECTORS NOKTA DETECTORS www noktadetectors com FORS Page 1 TABLE OF CONTENTS PARTS and ASSEMBUY mm etek dallama eke CORRECT WAY OF HOLDING and SWEEPING DEVICE INTRODUCTION nerina SEARCH MODES SENSITIVITY and THRESHOLD m da mn TARGET ID and ID MASKING smsni SWEEP SPEED and TARGET IDENTIFICATION n LARGE or SHALLOW TARGETS iiriiririnirn FALSE SIGNALS and COMMON CAUSES m dni MAGNETIC MINERALIZ
3. 1 TARGET ID 2 TARGET ID INDICATOR HORIZONTAL BAR ID 3 MAGNETIC MINERALIZATION LEVEL 4 GROUND TRACKING ON OFF 5 SEARCH MODE or WARNING MESSAGE 6 BATTERY LEVEL GEN ASTRA NOKTA DETECTORS www noktadetectors com FORS Page 9 DEVICE INTRODUCTION During Ground Balancing Rock RON Fo BD jj CD 1 GROUND BALANCE VALUE HL 2 GROUND BALANCE FINE TUNE VALUE Ground 60 20 3 SEARCH MODE or WARNING MESSAGE Balance 4 GROUND TRACKING ON OFF Pump The Coil 5 BATTERY LEVEL During Pinpointing 1 TARGET DEPTH 2 NEGATIVE POSITIVE BAR INDICATOR Target 2 8 3 MAGNETIC MINERALIZATION LEVEL Depth Rock IRON r GG F e 4 GROUND TRACKING ON OFF 5 BATTERY LEVEL NUMERIC DISPLAY The ground balance value during ground balancing and the target ID during searching instantly appears on the numeric display located on the handle The estimated target depth also appears on this display during pinpointing Therefore once you adjust your settings on the LCD panel located on the system box you can follow all the information you need on the numeric display This way you don t need to go back and check the LCD panel constantly This provides great comfort during searching The numeric display backlight turns on only when a number is displayed to save power NOKTA DETECTORS www noktadetectors com FORS Page 10 DEVICE INTRODUCTION MENU The menu screen allows you to access all the FOR
4. and the device will emit the same tone for all targets The audio warning tone will increase in pitch as the coil approaches the target In this mode the sensitivity and threshold settings are preset by the factory for best performance on most soil types If you want you can change these settings based on ground conditions in your search field ID Masking is not available in this mode so it is disabled in the menu We recommend using the General Search mode when discrimination is not necessary and not using it in heavy trash areas or areas containing many hot rocks DISCRIMINATION MODES DI2 DI3 and COG Different than the General Search mode there is no threshold in these modes and the device emits a warning tone only when a target is detected If the sensitivity level is not set properly you can hear a crackling sound in these modes Therefore the sensitivity should be adjusted to a level that the device is silent when there is no metal present Discrimination modes have some common features but they have slight behavioral differences ID Masking is a common feature used frequently in these modes ID Masking values are preset by the factory for these 3 modes If you want you can change these values based on field and ground conditions DISCRIMINATION 2 DI2 It is the 2 tone and the deepest one among discrimination modes It provides good results especially in clean fields without much trash metals In rocky or trashy fields
5. DETECTORS www noktadetectors com DEVICE INTRODUCTION EN Vy GROUND TRACKING CONTROLS 1 POWER SWITCH To turn on the device press the power switch to 1 position The startup tone will be heard and after the FORS CoRe logo is displayed for a short period of time the main screen will come up on the LCD panel 2 GROUND TRACKING SWITCH When the ground tracking is active at 1 position the device will track the changes in ground and automatically adjust the ground balance to suit The invisible changes in ground affects the detection depth as well as the discrimination ability of the device so you can improve the performance of the device by activating this feature on suitable ground You can find more details about ground tracking on page 19 3 MENU AND SETTINGS SWITCHES These switches allow you to access the menu and scroll through options as well as adjust device settings On the main screen you can access the menu by pressing one of the up down switches You can select the menu options with the up and down switch and change the value with the plus and minus Pressing these switches in a specific order will result in resetting factory settings or saving startup settings You can find more details about this on page 30 under the title FACTORY and STARTUP SETTINGS NOKTA DETECTORS www noktadetectors com FORS Page 8 DEVICE INTRODUCTION If you press and hold any of th
6. Discrimination Ground Balance Ground Tracking Pinpoint Freguency Shift Vibration Sensitivity Range Target ID Range Search Coil Weight Length Battery Warranty TECHNICAL SPECIFICATIONS VLF Induction Balance 15 Khz 100 Hz bandwidth Motion multi derivative 4 General Discrimination 2 amp 3 Conductive Ground 5 3 tones Auto and Manual Yes Yes Yes 28 5x17 8 cm 11 2 x 7 0 waterproof DD 1 8 kg 3 9 Ibs including batteries and search coil 125 150 cm 4 2 5 extendable 4 AA Alkaline 2 years Nokta Detectors reserves the right to change the design specifications or accessories without notice and without any obligation or liability whatsoever NOKTA DETECTORS www noktadetectors com FORS Page 31 m 00 Nokta DETECTORS Emek Mah Sivatyolu Cad Sakiz Sok No 4 Sancaktepe 34785 Istanbul Turkey Tel 90 216 415 56 86 Fax 90 216 415 63 43 E mail info noktadetectors com
7. be lowered Sensitivity in Discrimination Modes Because there is no threshold in discrimination modes by using the sensitivity setting alone you can increase the detection depth or enable the device to run without noise in different fields To adjust the sensitivity setting in discrimination modes ground balance first with the sensitivity set at its default value After the ground balance is completed hold the search coil still or sweep above the ground at the search height If the device receives noise lower the sensitivity If the device receives no noise when checking this please be sure that the ID Masking is also at its factory default value you can increase the sensitivity setting gradually to the highest level where there are no popping sounds During searching if the device starts receiving noise lower sensitivity gradually NOKTA DETECTORS www noktadetectors com FORS Page 21 TARGET ID and ID MASKING As mentioned before Target ID is a 2 digit number produced by the detector and it gives you an idea about what the target may be The number is displayed both on the LCD panel and the numeric display on the handle Under certain conditions the device may generate multiple IDs for the same target There may be a few reasons for this target orientation target depth purity of metal corrosion ground mineralization etc Based on these factors even the sweep direction may cause the device to generate multiple
8. however you can perform deeper searches by using the ID masking feature and sweeping the search coil more slowly about one full right amp left pass in 1 second ID Masking factory setting is 10 You can change this value according to the ID of the target In the DI2 mode the device will produce a low tone for iron and for all other metals it will produce a single tone just like in the General Search Mode which increases in pitch as the coil approaches the target To get familiar with the warning audio tones we recommend you to test the device with different metals and rocks before you use it in the field DISCRIMINATION 3 DI3 This is the 3 tone discrimination mode The device will emit a low grunt tone for iron a low tone for gold and foil and a high tone for non ferrous metals such as silver brass and copper This mode is ideal to use in fields with different types of metals enabling you to search faster with audio discrimination NOKTA DETECTORS www noktadetectors com FORS Page 15 SEARCH MODES If you want you can use the ID Masking to ignore unwanted targets The ID Masking default value is set to 10 We recommend you to change this value according to the type of target CONDUCTIVE GROUND COG This is the special mode of FORS CoRe designed for conductive ground wet beach sand alkali sand etc What is special about this mode is that it will not react to iron or similar targets within the same range and t
9. in areas where hot rocks are intensely present the device may not be able to eliminate these high mineralized rocks or you may miss the smaller or deeper metals such as gold nuggets IMPORTANT When air testing be sure that Ground Tracking is off Otherwise the device will try to ground balance over the target and lose depth NOKTA DETECTORS Www noktadetectors com FORS Page 19 GROUND BALANCE GROUND BALANCE VALUE The ground balance value indicates the type of ground Some typical ground types are as follows 0 25 Wet salt water or wet alkali soils 25 50 Wet salt water and wet alkali soils covered with dry layers 50 70 Regular low quality soils 70 90 Highly magnetic soils magnetite or maghemite and similar highly mineralized soils black sand IMPORTANT DETAILS ABOUT GROUND BALANCE When the device is turned on the ground balance value is preset to 90 Automatic ground balancing value ranges from 40 90 in all modes and from 0 90 in COG mode If the ground mineralization is too low the automatic ground balance may not work except for the COG mode You can test the accuracy of the ground balance setting in the pinpointing mode as well Once the ground balance is done lower the search coil to the ground If the device receives no signal or a very weak one as the search coil approaches the ground it means that the ground balancing was successful On the contrary if the device receives noise as the search coil approa
10. low in areas with high magnetic mineralization and the user should be aware of this fact Second magnetic mineralization is a property also found in hot rocks and measuring its level will play an important role for the device to eliminate false signals caused by hot rocks HOT ROCKS and SEARCHING IN ROCKY AREAS Tough ground conditions occur especially if the conductivity and magnetic properties of the ground are intense Most of the time correct operation of the device on such ground is possible with accurate mode selection proper ground balance sensitivity and threshold settings Stones and rocks or dips and holes in the ground affect the quality of searching and target detection as much as the ground itself does Soil and rocks have two different properties just like the targets you are searching for One of them is the intensity and the other one is the conductivity magnetic permeability ratio and these two properties are independent from each other In this manual the conductivity magnetic permeability ratio will be referred to as ID in short High magnetic permeability low conductivity results in low ID Soil or rocks can be highly permeable and have low or high IDs as well If the conductivity increases relatively to magnetic permeability then the ID will also increase Hot rocks are classified as negative or positive based on their ID being low or high in comparison to the ID of the soil they are in One or both of the types ma
11. or errors It just tells you what to do COIL NOT CONNECTED It indicates an interruption in the search coil transmitter signal The search coil connector may be unattached loose or disconnected If you own another detector with the same coil connector please be sure that you have not attached the wrong coil by mistake If none of the above exists the search coil or its cable may have a defect If the issue continues when you change the search coil there may be an issue in the coil control circuit LOW BATTERY This message appears when the battery level drops below a certain point The device may continue to work a few more hours Meanwhile please change the batteries NOKTA DETECTORS www noktadetectors com FORS Page 29 FACTORY and STARTUP SETTINGS The technical settings of the device Mode Ground Balance Sensitivity Threshold and ID Masking Freguency come with their factory default values at each startup Personal settings Volume Tone Vibration Brightness and Language come with the last adjusted value when the device is turned off and on again You can customize and save your startup settings by following the steps below 1 Goto the menu screen and be sure that all the options are at the desired setting 2 Waitand exitthe menu 3 On the main screen press and hold one of the up or down switches for at least 4 seconds The menu screen will appear do not let go of the switch 4 Keeping the switch pressed press
12. response when lowering the search coil a weak but an audible response is heard This method may result in positive results for smaller objects in some fields when used by experienced users GROUND TRACKING With this feature the user does not need to make any adjustments Ground Tracking can be activated by turning the Ground Tracking switch to 1 position The Ground Tracking icon 777 onthe LCD panel starts blinking As long as the search coil is swept over the ground the device updates the ground balance setting It does not provide the user any kind of feedback such as the ground balance value or the beep sound in the auto ground balance When Ground Tracking is active the device may emit a loud audible signal if the ground conditions change for example a hot rock or if a target is encountered In such a case sweep the search coil a few times over the spot where you receive the signal If the sound continues and the device gives an ID there is a high chance that it is a target If the sound gets weaker or disappears after a few sweeps it means that that the device gave a signal for the ground change or the hot rocks For better performance we recommend you to use Ground Tracking in the General Search mode and not in the discrimination DI2 DI3 and COG modes Ground Tracking is suitable for fields with different types of soils or where hot rocks are scattered around a large area and not condensed If you use Ground Tracking
13. see in for longer battery life VIBRATION BL aval 02 This feature enables the device to provide vibration feedback as well as audio when a target is detected during searching Vibration can be used alone without audio feedback When the volume is turned off target detection will be conveyed to the user by vibration Vibration level can be adjusted from 0 to 5 When set to 0 vibration will be deactivated By adjusting the vibration level between 1 and 5 you can change the speed of vibration in other words the effect felt by the user in all search modes At level 1 the device will only vibrate on more definite targets shallow and the target s vibration signal will be longer At the maximum level 5 the device will vibrate with smaller target signals deeper and the vibration signals will be shorter The speed of vibration will vary based on target depth and sweep speed When you turn off and on the device it will start with the last vibration level you chose This setting is common to all modes changes will take effect in all modes The speed of vibration is fixed in the pinpointing mode it cannot be adjusted In other words there is no difference between 1 and 5 But when it is set to 0 it will be off just like in the search modes In the pinpointing mode the speed of vibration will increase as you get closer to the center of target response and it will reach its maximum level at the center The vibration feature of FORS CoRe has b
14. the minus button Please wait message will appear on screen You can let go of the switches 5 Wait while the message is on screen In about 4 6 seconds the process will finish and the menu screen will come up It is normal for the device to emit different sounds during this process 6 Turn off and on the device again Go to the menu to check whether your desired startup settings are saved or not Changing the startup settings do not mean changing the factory default settings You can restore factory defaults at any time This process is done the same way The only difference is that you use the switch instead of 1 Be sure that you have exited the menu and vou are in the main screen 2 Onthe main screen press and hold one of the up or down switches for at least 4 seconds The menu screen will appear do not let go of the switch 3 Keeping the switch pressed press the plus switch Please wait message will appear on screen You can let go of the switches 4 Wait while the message is on screen In about 4 6 seconds the process will finish and the menu screen will come up It is normal for the device to emit different sounds during this process 5 Turn off and on the device again Go to the menu and be sure that the factory defaults are restored NOKTA DETECTORS www noktadetectors com FORS Page 30 Operating Principle Operating Freguency Metal Identification Search Modes Audio Freguencies Audio
15. ATION LEVEL HOT ROCKS AND SEARCHING IN ROCKY AREAS EFFECTS OF HOT ROCKS IN GROUND TRACKING METALS UNDER HOT ROCKS SEARCHING IN SHALLOW WATER AND ON THE BEACH FACTORYandsTARTUPSETT NGS TECHNICAL SPECIFICATIONS mmm NOKTA DETECTORS www noktadetectors com FORS Page 2 WARNINGS LEGAL WARNINGS gt When using the device comply with all applicable laws and regulations Do not use the device in private premises historic sites and military zones Notify the authorities of any historical or cultural findings WARNINGS ABOUT THE DEVICE gt This is a high tech electronic device Do not assemble or use the device before reading the user manual gt Do not expose the device or the search coil to very hot or cold conditions for extended periods of time Storage Temperature 0 C 32 F 40 C 104 F gt Do not immerse the device or its accessories except the search coil in water do not expose them to extreme humid conditions gt Protect the device from external impact especially during transportation The device can only be opened and repaired by authorized service technicians The warranty will be voided if the device is opened by you or an unauthorized person Do not use the device indoors The device will constantly give target signals inside places like homes where there are many metals present Use the device outdoors in open fields Do not let anothe
16. CD panel The bar starts filling up as the target is approached The furthest point it fills up to indicates the center of the target At the same time the estimated depth reading appears on the LCD panel as well as the numeric display on the handle see page 25 The signal tone increases in pitch and volume as the search coil approaches the target In the pinpoint mode the device does not discriminate or give target IDs If the device is in the vibration mode the speed of vibration will increase as you get closer to the center of target To pinpoint 1 After a target is detected move the search coil aside where there is no target response and press the pinpoint button 2 Keeping the button pressed approach the target with the search coil keeping it parallel to the ground 3 As the center of the target is approached the signal tone will get stronger and change in pitch At the same time the depth reading on the screen will start decreasing 4 Mark the spot where you get the loudest response with your foot or an object 5 Change your direction 90 and repeat the above steps Repeating this process from a few different angles will narrow the field of detection and give you a better idea of target location NOKTA DETECTORS www noktadetectors com FORS Page 24 DEPTH INDICATION The device gives an estimated depth reading based on signal strength in the pinpoint mode When the pinpoint button is pressed and the target is a
17. IDs On the other hand the device may not give any ID under some circumstances For the device to generate an ID the target signal must be strong enough for signal processing Therefore although it may detect very deep or small targets it may not be able to generate an ID In addition to the target ID there is a color scale at the top of the LCD panel which represents rocks iron and metals encountered in the field When a target is detected simultaneously with the display of the target ID the target ID indicator horizontal bar shows the color range corresponding to the detected target What you should keep in mind is that the target ID and colors are estimated values and there is no way of knowing for sure whats buried other than to dig it up Non ferrous metals such as copper aluminum lead etc have high IDs The ID range of gold however is broad and can fall in the same range with some trash metals such as iron folio screw caps and pull tabs Therefore if you are looking for gold targets digging out some trash metals is expectable Probable IDs and ranges of some targets are shown in the table below US Modern Coins Europe Modern Coins US 5 cent nickel 10 20 50 Euro cent US 10 cent dime US 25 cent quarter Non ferrous Metals Trash Metals Gold nuggets and coins Iron nuts and bolts nails Silver and lead Folio Brass and copper Pull tabs Aluminum Bottle caps Hot Rocks and
18. Mineralized Soils Hot rocks 0 5 95 99 Iron rocks 5 25 Salty and alkali soils 25 35 NOKTA DETECTORS www noktadetectors com FORS Page 22 TARGET ID and ID MASKING on ET ROCK IRON FOIL B Brown Area Hot rocks Blue Area Ferrous metals iron rocks salty and alkali soils Yellow Area Gold folio soda cans pull tabs some coins etc Red Area Copper brass aluminum silver gold some coins bottle caps some hot rocks etc This data may vary based on the field conditions Coins in different regions of the world have been made from different types of metals and in different sizes throughout the history To better understand which coins give what IDs try to get a hold of the coins you are looking for and test to see the ID it generates It may take some time and experience to utilize the Target ID feature in your search area because Target IDs as well as the depths the IDs are generated by different brands and models of detectors are also different As mentioned before ID Masking is the ability of the device to ignore not produce a warning tone or ID unwanted targets ID Masking is not active in the General Search mode ID Masking values of the discrimination modes are preset by the factory If you want you can change the ID Masking values in the menu To change the ID Masking value first choose the ID Masking option in the menu and using the or switches either increase or decrea
19. S CoRe settings You can go to the menu screen by pressing one of the up down switches while on the main screen and adjust the settings of the device Now le s take a look at these settings MODE ECE FORS CoRe has 4 predefined search modes based on ground conditions and target type During your search you can select one of these modes and guickly personalize its settings in the menu if you want to The names of the search modes are abbreviated as GEN DI2 DI3 and COG Please read the SEARCH MODES section for more details on modes see pages 15 16 SENSITIVITY HAE AA 50 It is the detection depth setting that controls the gain of the device It is used to eliminate the electromagnetic interference signals received from the surrounding environment as well as ground noise Each mode has its own default sensitivity value in the menu When you change the mode the sensitivity value preset for that mode is displayed This does not affect the sensitivity levels set by the user in other modes For ideal settings and detailed information please refer to the SENSITIVITY and THRESHOLD settings page 21 Sensitivity level can be adjusted from 1 to 99 The most ideal sensitivity level for each mode has been preset by the factory Sensitivity level may be changed manually when needed THRESHOLD fu ite Mp 60 Threshold is used to increase the target signals and thus the detection depth of the device In General Search mode it adjusts the
20. a metal by looking at the ID Please keep in mind though weaker signals tend to give different IDs and metals under rocks may produce different metal signals Conseguently digging up a target signal is the best option If you are using the discrimination modes and know the IDs of the hot rocks around you you can use ID masking to eliminate these rocks However this may not be sufficient to avoid all rock signals The device may still receive signals from rocks because soil and hot rocks together will form a combined effect and generate a different ID than those of rocks EFFECTS OF HOT ROCKS IN GROUND TRACKING When the ground tracking is active the device may give a warning tone and ID when it passes over a hot rock because the effect of the hot rock will be different than the ground s If you sweep the search coil over the rock ground tracking will automatically adjust the setting and the warning tone ID will either disappear or diminish significantly Because there is a slight delay in ground tracking you may hear a strong signal at the first one or two sweeps until the setting is adjusted Then the sound will get weaker and disappear This will not happen with metal targets because metals will prevent the device from ground balancing Therefore in ground tracking if you are getting a constant signal over a target after repeated sweeps there is a high possibility that the target is a metal Moving from over a hot rock back to soil the devi
21. audible level of the constant background hum For more details on threshold please refer to the SENSITIVITY and THRESHOLD settings page 21 ID MASKING FEDERE When the search coil passes over a target if the target signal is strong enough a 2 digit target ID will be displayed on the numeric display as well as the LCD panel Target ID ranges from 0 to 99 Target ID is a number produced by the detector based on a target s conductivity and it gives you an idea about what the target may be ID Masking is the ability of the detector to ignore not produce a warning tone or ID unwanted targets It provides ease of use by rejecting mineralized rocks hot rocks and metals such as iron and foil NOKTA DETECTORS www noktadetectors com FORS Page 11 DEVICE INTRODUCTION You can customize ID Masking according to your needs Each mode has its own default ID Masking value in the menu When you change the mode the ID Masking value preset for that mode is displayed This does not affect the ID Masking levels set by the user in other modes ID Masking is not active in the General Search mode For detailed information on Target ID and how to use ID Masking please refer to the section TARGET ID and ID MASKING pages 22 23 FREQUENCY fiA 6 03 Changes the operating frequency of the device It is used to eliminate the electromagnetic interference received from the surrounding environment or another detector operating within the same frequen
22. ce may give signals to the ground for a few sweeps until the ground balance setting is updated again This is normal and should not mislead you Under normal circumstances ground tracking should not be used for elimination of hot rocks It is recommended for use in areas with changing soil types METALS UNDER HOT ROCKS It is a hard task for average or simple detectors to find metals under rocks These detectors will generally miss the metals and thus make them available for you and protected from others For this reason a missed target by another detector makes you lucky for reading this manual and using the FORS CoRe A well adjusted FORS CoRe will increase your chance of finding metals under hot rocks The combined effect of a metal and a hot rock is less than the metal s effect by itself and the received ID will be different than the meta s expected ID The ID will be a combination of the rock s and metal s and based on how small the metal is compared to the rock it will be closer to the rock s ID You should always keep in mind that metals under hot rocks will never appear with their own metal ID For example gold under a brick may generate an iron tone and ID instead of gold NOKTA DETECTORS www noktadetectors com FORS Page 27 METALS UNDER HOT ROCKS In reality a simple principle can save you a lot of time If the target encountered is not a rock it can be metal The key to finding targets especially under positive h
23. ches the ground it means that the ground balance has failed In this case change your location and try re ground balancing If you still cannot ground balance you need to continue searching without ground balance Turn off and on the device again and start searching without ground balancing If you receive noise when you sweep the coil over the ground set the search mode to DI3 or DI2 adjust sensitivity accordingly or to COG mode if you are on the beach and increase the ID Masking to a level where the noise is eliminated On the other hand because the ID Masking is not active in the General Search if you cannot reduce the noise you cannot continue searching either Once the ground balance is set it will remain satisfactory for a long time in most areas However in areas where the soil has been disturbed by digging or filling up or in geologically complex areas you may have to ground balance frequently to accommodate changing ground conditions NOKTA DETECTORS www noktadetectors com FORS Page 20 SENSITIVITY and THRESHOLD Adjusting these two settings correctly is critical for the device to work at its best performance and without noise It is possible to obtain an average performance with the startup settings However to be able to have better detection depth in clean areas or to be able to search in tough ground conditions these two settings must be adjusted properly Sensitivity and Threshold in General Search Mode I
24. cy range If the device receives a lot of noise when the search coil is held in the air the cause may be electromagnetic interference or a high sensitivity setting If you suspect electromagnetic interference you may change the frequency There are 5 frequencies in the device The factory default is 03 Normally the frequency setting is not enabled and it is grayed out in the menu To activate it while holding the pinpoint button pressed press one of the up down switches Then you can select the frequency option in the menu and change it IMPORTANT Frequency shifting may affect the performance of the device Therefore it is recommended that you do not change the frequency unless necessary and keep it at the factory default VOLUME fe RUI 02 This control allows you to increase or decrease the device s volume based on your preference and environmental conditions Volume level can be adjusted from 0 to 20 When you turn off and on the device it will start with the last volume level you chose This setting is common to all modes changes will take effect in all modes Because the volume level affects power consumption we recommend you not to increase it more than necessary TONE el 01 It allows you to change the audio freguency of the threshold and target warning tones according to your preference There are 5 different audio freguencies ranging from treble to bass Tone change does not affect the iron tone It is active in the Gen
25. d before salty water or alkali ground are highly conductive d and they create iron effects on detectors FORS CoRe Conductive Ground mode COG is specifically designed for these types of ground You can easily search with the COG mode without any other settings COG mode is ideal for wet sand beach When searching on dry sand you can also use the other modes Please remember the following when searching in water or on wet beach sand 1 You can get metal signals when you sweep the search coil over the holes you dig on wet beach sand this is normal 2 The search coil may give false signals when going into and coming out of the water so please try to keep the coil either in or out of the water NOKTA DETECTORS www noktadetectors com FORS Page 28 MESSAGES At the bottom of the LCD panel on the main screen messages will appear if any If there is no message the present search mode name will be displayed Messages that may appear are as follows OVERLOAD It appears simultaneously with the overload warning alarm sounding like a siren This happens when the search coil encounters a shallow or a very large object The device will revert back to normal operation if you lift the coil up If the alarm and the message continues along a long line you may be over a long metal such as a pipe PUMP THE COIL It appears when the ground balance button is held pressed for automatic ground balancing It does not indicate any issues
26. d dips The above mentioned situations do not only occur as a result of improper ground balance adjustment However before looking into other reasons you must be sure that the ground balance is correctly adjusted Ground balance value is common to all modes changes will take effect in all modes When using the automatic ground balance or ground tracking this setting is adjusted automatically Ground balance can be done in three ways in FORS CoRe Automatic Manual or Ground Tracking During automatic or manual ground balancing when you press the ground balance button no matter what mode you are using the device will unnoticeably revert to the General Search mode and the audible tones will be heard accordingly AUTOMATIC GROUND BALANCE Automatic ground balance is done the same way in all modes 1 Find a spot on the ground where there is no metal 2 Press and hold the ground balance button and pump the search coil up and down from about 15 20 cm 6 8 above the ground down to 3 cm 1 off the ground 3 Continue until you hear the beep indicating that the ground balancing is completed Based on ground conditions it usually takes about 1 4 pumps for the ground balance to be completed 4 Once the ground balance is done the ground balance value will appear on the LCD panel as well as the numeric display on the handle If you continue to press and hold the ground balance button the device will keep on ground balancing and bee
27. d the armrest and push forward Then secure by tightening the nuts Attach the armrest strap by inserting it through the holes PARTS and ASSEMBLY Wrap the coil cable around the shaft all the way up as shown in the picture and after inserting it in the coil input socket underneath the system box secure it by twisting the connector Pay attention to not wrap the cable too tight during this step Insert the handle cable in the socket underneath the system box HANDLE and secure it by twisting the connector Finally secure the cable by attaching the clamps at 3 different spots 1 To attach the telescopic shaft to 1 Place the washers into the the S rod first loosen the twist openings at the end of the lock 2 By holding the metal pin telescopic shaft 2 Place the shaft pressed insert the telescopic on the coil as shown in the shaft into the S rod and click the picture 3 Secure by tightening pin into its hole 3 Secure it by the bolt and the wingnut tightening the twist lock 4 After adjusting the shaft length to your height secure by tightening the twist lock eightis wrong It is very important to adjust the shaft to your height correctly to be able to search without discomfort and fatigue T WAY OF SWEEPING It is important to keep the search coil parallel to the ground in order to get accurate results Adjust the height of the shaft so that you are stand
28. ditions the conductivity level of the soil may be very high Soil and rocks have magnetic properties as well as conductivity For this reason when searching in soil and between rocks in order for the detector not to give a target signal for the soil the detector should be able to eliminate the soil and minimize the effects of rocks while still detecting real targets Otherwise false signals and noise may mislead the user and make it impossible to find the target The purpose of ground balancing is to eliminate these false signals and noise When you sweep the search coil over the ground you can see whether the ground balance is adjusted properly or not However if the signals and noise continue when the coil is raised up you must consider the possibility of the electromagnetic waves in the surrounding environment Electromagnetic waves may result from power lines or from the operation of electrical devices radars wireless radios and even TVs In such a case first make sure that the device is silent by making the sensitivity and threshold adjustments and then ground balance NOKTA DETECTORS www noktadetectors com FORS Page 16 GROUND BALANCE One of the following may happen as a result of improper ground balancing The device gives a signal when the coil is swept over the ground where there is no target The device is silent but loses detection depth for certain metals The device receives target like signals next to holes an
29. een developed with hearing impaired people in mind The hearing impaired users have to follow the screen constantly and this can be tough during searching There is a good chance that they will miss a target when they are not looking at the screen Vibration feature enables the hearing impaired users to metal detect more conveniently LANGUAGE EA c lt ac EN Is used to change the language of the device The FORS CoRe menus can be viewed in 10 languages At initial startup the factory default language will be displayed The user can change the language in the menu When you turn off and on the device it will start with the last language you selected Language is placed as the last option in the menu so it is easy to find in case the language is changed to a foreign language by mistake For languages written from right to left the screen layout is also designed that way NOKTA DETECTORS www noktadetectors com FORS Page 13 DEVICE INTRODUCTION IMPORTANT DETAILS ABOUT MENU USAGE If no button is pressed for a few seconds after accessing the menu the device will go back to the main screen If you do not want to wait you can press and release the pinpoint button once to go to the main screen as well Do not turn off the device while the menu screen is displayed If you turn off the device while in the menu and made changes in the personal settings volume tone brightness vibration and language the changes will not be saved
30. eral Search DI2 and COG modes It is inactive in the Discrimination 3 DI3 mode It changes the audio freguency of the threshold sound in the General Search mode and the gold non ferrous metal sound in the DI2 and COG modes BRIGHTNESS le 08 This control allows you to adjust the backlight level of the numeric display on the handle and the LCD panel on the system box based on your preference and environmental conditions Brightness level can be adjusted from 0 to 20 This setting is common to both displays changes will take effect on both When you change the brightness level in the menu the backlight will turn on the numeric display and number 88 will appear for easy adjustment When you turn off and on the device it will start with the last brightness level you chose This setting is common to all modes changes will take effect in all modes NOKTA DETECTORS www noktadetectors com FORS Page 12 DEVICE INTRODUCTION The brightness level of the LCD panel on the system box affects power consumption a lot Therefore the backlight illuminates during menu access and ground balancing It does not illuminate during searching or target detection On the other hand the brightness level of the numeric display on the handle affects power consumption relatively less It illuminates during target detection and pinpointing Especially if you are using the menu freguently we recommend that you choose the minimum brightness level that you can
31. ese switches at startup system information including software version and the serial number of the device will appear on the screen after the Nokta logo is displayed for a few seconds This information will stay on the screen as long as you hold the button pressed Please have his information ready when you contact your dealer regarding your device 4 GROUND BALANCE BUTTON Allows you to ground balance manually or automatically before or during your search By keeping this button pressed and pumping the coil you can guickly ground balance the device at any time When you press and release the button you can ground balance manually by changing the ground balance value on the screen Please read pages 16 20 for more information on ground balance 5 PINPOINT SWITCH It is used to find the exact location of the target Pinpointing saves you digging time by narrowing down the location of a buried target Please refer to PINPOINT section on page 24 for more details 6 LED FLASHLIGHT Is used for illumination at night or in dark places The flashlight will not work when the device is off Having the flashlight on will affect power consumption so we recommend to keep it off when not needed 7 LED FLASHLIGHT POWER SWITCH Is used to turn on off the flashlight MAIN SCREEN You can see all the information you need during searching ground balancing and pinpointing on the main screen The information is as follows During Searching
32. from 0 99 However each 20 number includes 5 steps used for fine tuning and these steps are shown on the LCD panel over the 777 symbol and in multiples of 20 For example the ground balance value on the screen to the side is 60 20 To increase the ground balance setting press the up switch and to decrease it press the down switch If you press the switch one by one the values will change one by one as well If you hold the switch pressed the values will change rapidly NOKTA DETECTORS www noktadetectors com FORS Page 18 GROUND BALANCE 4 Continue the above process until the sound is eliminated If the sound is not completely eliminated then you can fine tune For fine tuning follow the numbers above the 777 symbol and use the and switches The sound may not be eliminated completely on some types of ground although you have fine tuned In such a case to determine whether you have successfully ground balanced or not listen to the audio feedback when lowering the search coil to the ground and when lifting it off the ground If both sound the same it means that the ground balance is adjusted properly After a while the ground balance is completed the device will switch to the main screen automatically If you do not want to wait for this period you can go to the main screen by pressing and releasing the pinpoint button once IMPORTANT Experienced detectorists adjust the ground balance setting to little positive
33. hat the device will ground balance easily on all types of ground The reason for this is that while the device can ground balance automatically between 40 90 in the other discrimination modes it can ground balance between 0 90 in this mode This enables you to easily ground balance the device on conductive ground where normally you can hardly ground balance or cannot ground balance it at all Just like in the DI2 mode in the COG mode the device will produce a low tone for iron and a single tone for all other metals which increases in pitch as the coil approaches the target Different than the other modes the ID Masking is preset to 40 to eliminate ferrous metals or ground effects due to iron mineralization Salty water or alkali ground are highly conductive due to high ionization and they create iron effects on detectors These effects can easily impair a detector s capability of searching and detecting metals Existence of iron elimination feature in a detector can improve the situation but may not be sufficient FORS CoRe Conductive Ground mode eliminates these effects and ground noise What you need to pay attention to when metal detecting on conductive ground are further explained under SEARCHING IN SHALLOW WATER and ON THE BEACH see page 28 GROUND BALANCE Metal detectors work on the principle of conductivity and all metals are conductive On the other hand soil itself has a certain degree of conductive property Under certain con
34. ing in an upright position your arm is relaxed and the search coil is approximately 5cm 2 above the ground The search coil must be parallel to the ground at all times BATTERIES Battery The device comes with 4 AA Alkaline batteries Slide and remove the battery compartment cover by pressing the latch Insertthe batteries paying attention to the plus and minus poles When batteries are full they will provide approximately 25 30 hours of use Different types or brand of batteries may have different lifetimes For best performance using AA Alkaline batteries is ecommended You may also use high guality rechargeable Ni MH batteries Rechargeable batteries with higher mAh capacity ratings will provide longer run times Using batteries with minimum 2500mAh is recom mended LOW BATTERY The battery icon on the LCD panel indicates the battery life status In addition a warning message will appear on the screen when the batteries are low After the low battery warning the batteries will run approximately 3 4 more hours This runtime will vary based on the remaining battery charge Ni MH batteries have lower voltage so their remaining runtime will be longer than Alkaline batteries This does not affect the total runtime ROCK IRON FOIL G ROCK IRON r O JJ NOKTA
35. n the General Search mode a constant background hum is heard during searching The loudness of this hum directly impacts the detection depth of smaller and deeper targets and it is adjusted by the threshold setting If the threshold is set too high the target signal may not be heard On the contrary if it is too low you give up the depth advantage this setting offers In other words weak signals of smaller or deeper targets may be missed Threshold setting comes with the default value at each startup not with the last adjusted value It is recommended for average users to leave this setting at its default value and for experienced users to adjust to the highest level where they can still hear the weak target signals In the General Search mode although the sensitivity setting seems like it is behaving similarly to the threshold it actually causes an increase or decrease in the popping sounds and false signals It is important to set the sensitivity setting to the highest level possible where no major popping sounds are heard For example if the noise level is suitable for searching and is the same at sensitivity levels 20 and 50 then 50 should be preferred Using the factory default levels will be a good starting point until you get familiar and experienced with the device If the device is stable but too noisy the threshold setting should be decreased However if it sounds erratic and there is too much popping the sensitivity setting should
36. of ground Therefore we recommend that you use automatic ground balance at start up However some soils are not suitable for automatic ground balancing except for the COG mode For example wet beach sand soils containing alkali or salty water trashy areas plowed lands highly mineralized ground or ground with very low mineralization are not suitable for automatic ground balancing We recommend you to manually ground balance in such areas for your convenience Manual ground balance reguires experience acguired with some practice To ground balance manually 1 Find a spot on the ground where there is no metal 2 Pump the search coil up and down from about 15 20 cm 6 8 above the ground down to 3 cm 1 off the ground If the sound gets louder as you lift the search coil off the ground it means that the ground balance value is too low In other words the ground is negative and you need to increase the ground balance setting with the up switch On the contrary if the sound gets louder as you lower the search coil to the ground it means that the ground balance value is too high In other words the ground is positive and you need to lower the ground balance setting with the down switch 3 Press and release the ground balance button once The ground balance value will appear on the LCD panel and will stay on screen for a while If the screen changes you can press the ground balance button again Manual ground balance ranges
37. ot rocks is knowing the maximum ID value of the positive hot rocks around vou If you are searching in the General Search mode keep an eye on the ID If the ID is close to the rock and iron range there is a high chance of finding a target under the rock Because ID Masking is not an option in the General Search mode you need to ignore signals based on the ID number on screen In the discrimination modes if you eliminate hot rocks with a properly adjusted ID Masking setting you can hear the signal of the target under the rockif the target signal has a slightly greater effect than the masked ID The important thing here is that if you detect a target and dig out a rock you should note the ID you got before digging and use it as the ID Masking value the next time For example the hot rocks in your search field tend to give IDs around 3 4 In this case you should setthe ID Masking to maximum 5 This way you can eliminate rocks and the signals of metals underneath If you set the ID Masking too high unnecessarily you will lose metals along with rocks If the hot rocks in your search area tend to give high IDs then the chances of missing the signals of small metals underneath will be high as well SEARCHING IN SHALLOW WATER AND ON THE BEACH FORS CoRe search coils are all waterproof This provides convenient searching in shallow water and on beach If searching around water be careful not to get the system box or the handle wet As mentione
38. ping To make sure that the ground balance adjustment is correct please repeat the process 2 or 3 times and each time check the value on the display The difference between the values should not be greater than 1 or 2 numbers 5 If you cannot ground balance meaning you don t hear the beep either the ground is very conductive or not mineralized or there must be a buried metal object underneath the coil In such a case move to another location and re ground balance If you still cannot succeed try manual ground balancing Pump The Coil NOKTA DETECTORS www noktadetectors com FORS Page 17 GROUND BALANCE After the ground balance button is released the device will work in the General Search mode and the ground balance value will remain on screen for a while If you do not want to wait for this period you can go to the main screen by pressing and releasing the pinpoint button once This gives you the opportunity of fine tuning the automatic ground balance value Please refer to the following MANUAL GROUND BALANCE section for more details MANUAL GROUND BALANCE It is the process where you set the ground balance value manually Because it is more time consuming it is not preferred by most users However it becomes useful when ground balance cannot be achieved by other methods or when you need to fine tune the automatic ground balance value FORS CoRe is designed in a way that you can easily auto ground balance it on all types
39. pproached the depth reading will appear in cm on the LCD panel and the numeric display simultaneously Approximate depth is provided based on the assumption that the target is a typical modern coin The real depth will vary based on target size The device will give a greater depth reading for smaller targets and for larger targets the depth reading will be smaller than they really are In fact pinpointing is used for target location and not depth indication Therefore we suggest that you use the depth reading for judging the proximity of the target SWEEP SPEED and TARGET IDENTIFICATION FORS CoRe is a very fast responding detector When you detect a target with the FORS CoRe in order to get an accurate ID of the target instead of narrowing the sweeps and making quick sweeps over the target like in other detectors you should make wider and deliberate sweeps If the sweep speed is wrong the device cannot identify the target accurately and the IDs may bounce around In addition when you are sweeping the search coil pay attention not to tilt it up or down and always keep it parallel to the ground LARGE or SHALLOW TARGETS Shallow targets may give multiple responses to the device If you suspect a shallow target lift the search coil and sweep slowly until you get a single response Similarly large targets may cause an overload in the search coil and the device may give an alarm sounding like a siren At the same time Overload message
40. r detector or an electromagnetic device come in close proximity 10m 33ft to the device Do not carry any metal objects while using the device Keep the device away from your shoes while walking The device may detect the metals on you or inside your shoes as targets For Consumers within the European Union Do not dispose of this equipment in general C household waste The crossed wheeled bin FCC STATEMENT symbol on this equipment indicates this unit should not be disposed of in general household waste but recycled in compliance with local government regulations and environmental requirements This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interferen ce that may cause undesired operation NOKTA DETECTORS www noktadetectors com 1 System Box 2 Handle and S Rod 3 Right Left Armrest Components 4 Armrest Strap 5 Search Coil 6 Telescopic Shaft 7 Bolts Nuts and Washers 8 3 Cable Clamps 9 4 AA Batteries 10 Headphones PARTS and ASSEMBLY Attach the right left armrest components to the S rod with the bolts and nuts as seen in the picture Do not tighten the nuts but rather leave them loose these will be tightened after the system box is attached Place the system box on the rail behin
41. se it to the number you have determined Please keep in mind that certain metals other than the ones you are masking will also be lost or their signal strength will diminish resulting in loss of depth For example when you set the ID Masking to 40 the device will ignore all signals with IDs less than 40 and will not produce a warning tone The device will also miss targets under rocks of which the received IDs are less than 40 To give another example in the case of receiving multiple IDs let s say 35 and 55 due to target orientation or metal property if you mask the IDs up to 40 35 will fall in the masked range so the signal strength may diminish and depth may decrease NOKTA DETECTORS www noktadetectors com FORS Page 23 PINPOINT Pinpointing is to determine the center or the exact location of a detected target FORS CoRe operates on the principle of motion This means that you must move the search coil over the target or the target over the search coil in order for the device to detect it In the pinpoint mode however the device constantly gives signal when you hold the search coil still over the target A proper ground balance setting is a must for accurate pinpointing In changing ground conditions re ground balancing is recommended before pinpointing When you press and hold the pinpoint button a horizontal bar moving in the negative or positive direction indicating metal or soil rock effects appears on the L
42. will appear on the LCD panel In such a situation raise the search coil until the message disappears FALSE SIGNALS and COMMON CAUSES Sometimes the device may receive signals although there is no real target There are a few different causes for this Most common ones are ground mineralization or hot rocks electromagnetic interference in the surrounding environment operation of another detector nearby rusty iron and corroded foil and sensitivity and threshold set too high The electromagnetic interference can be eliminated by reducing sensitivity If another detector is working nearby you can change your location and continue your search For ground mineralization or hot rocks and sensitivity and threshold set too high please read the related sections Ground Balance Hot Rocks and Searching In Rocky Areas Metals Under Hot Rocks Sensitivity and Threshold NOKTA DETECTORS www noktadetectors com FORS Page 25 MAGNETIC MINERALIZATION LEVEL Magnetic Mineralization level ranges from 0 99 and is 76 displayed in the Magnetic Mineralization Indicator on the right side of the main screen This measurement can be summarized as the amount of the magnetic property and intensity of the ground Simply if you are working on a ground with intense and magnetic minerals this value will be high If the ground has low magnetic intensity this value will be small This measurement is important from two aspects First detection depth is
43. y be present in a field The negative and positive effects mentioned here will only be valid if ground balancing is properly done on the existing ground Otherwise soil itself will not act differently from hot rocks in terms of ID In Ground Tracking however conditions will differ Therefore the effects of hot rocks in Ground Tracking will be discussed separately Here we are referring to a proper ground balance without Ground Tracking Positive hot rocks act and sound just like metals In the General Search mode when you sweep the search coil over them they tend to give a short zip zip sound If the signal is strong enough the device may also give an ID for these rocks Negative hot rocks on the other hand tend to give a longer boing sound when the search coil is swept over them The device will not give an ID for these rocks regardless of the signal strength NOKTA DETECTORS www noktadetectors com FORS Page 26 HOT ROCKS and SEARCHING IN ROCKY AREAS In discrimination modes positive hot rocks will give a typical metal sound again Negative hot rocks will not give any sound in these modes except for occasional false signals Therefore while searching in the field you can decide by listening to the warning tones emitted by the device If you get a metal tone it means that you have either detected a metal or a positive hot rock If you get a strong signal and a stable ID you can determine whether it isa hot rock or
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