OKM - User Manual
Contents
1. FS Future Series lack Hawk METAL LS User s Manual Any information contained in these operating instructions may be changed without prior notice OKM does not make any warranty for this document This also applies without limitation to implied assurances of merchantability and fitness for a specific purpose OKM does not assume any responsability for errors in this manual or for any incidental or consequential damage or loss associated with the delivery exploitation or usage of this material This documentation is available as presented and without any kind of warranty In no circumstances OKM takes responsibility for lost profits usage or data losts interruption of business activities or all kind of other indirectly damages which developed because of errors in this documentation This instruction manual and all other stored media which are delivered with this package should only be used for this product Program copies are allowed only for security and safety purposes The resale of these programs in original or changed form is absolutely forbitten This manual may not be copied duplicated or translated into another language neither in part nor completely over the copyright matters without the prior written consent of OKM Copyright 2002 2012 OKM GmbH All rights reserved Table of Contents Mae e e PP OE CE O O o o 7 EEE T e Walat lar ag Ala Erg Erga Ak Lera 9 1 2 2 Bassible Healt e aek AAA 92. All of this is done by reporting the variations within the magnetic field which is created by the coils After an item is detected allow for a recovery time or enough time for the creation of another magnetic field 6 1 Detection Depth In theory the larger the item is and the longer it has been in the ground the deeper it can be detected With a pulse induction detector there is a high voltage surge sent into the ground creating a large magnetic field Items with an electrical conductance will distort the magnetic field causing the detector to react The Delay function initializes the recurrence of the pulse This in combination with the size of the coil will affect the ultimate possible depth Varying soils and layers within the soil will also affect the ultimate depth of the detector Using a pulse induction metal detector enables you to search in soils with a higher magnetic permeability highly mineralized or susceptibility than other soils Although in such highly mineralized soils determining if an object is ferrous or non ferrous becomes exponentially more difficult depending on the amount of mineralization Air tests typically will be able to detect a metallic object twice the distance as the size of the coil 6 2 Ground Balancing The ground balance of the Black Hawk detector is mandatory for the proper operation of the unit Half of the balancing is done automatically the other half by making a few simple adjustments 1
3. Avoid strong magnetic fields which may occur in places where there are large electric motors or unshielded loudspeakers Try to avoid using this equipment within 50 meters 150 ft of this type of equipment Metallic objects on the ground such as cans tin nails screws or debris can influence your scan data and present negative results regarding your scan data Also it is a good habit to remove any metallic objects off of your person like cellular telephones keys jewelry etc Do not wear steel toe boots 1 2 4 Voltage The power supply can not be outside the indicated range of values Use only approved chargers batteries and rechargeable batteries which are included within the scope of delivery Never use the 115 230 Volt mains supply OKM GmbH www okmmetaldetectors com 10 1 2 5 Data Correctness Data errors can occur if e the power supply of the device or the batteries are too low e the cables are too long e the unit is operating to close to devices which sends out disturbances or e atmospheric conditions electrical storms lightning etc 1 3 Maintenance and Services In this section you will learn how to maintain your measuring instrument with all included accessories to keep it in good condition a long time and to get good measuring results The following list indicates what you absolutely should avoid e penetrating water e strong dirt and dust deposits e hard impacts e strong m
4. aya KA RA 1RO RU1 Q0 b xl iia b i max 3 A Egi etzue eut 4400 mAh WV CMG aA AAE 605 y ez ASE Output Voltage 19 VDC Input 100 240 VAC 50 60 Hz OKM GmbH www okmmetaldetectors com Scope of Delivery 16 In the following section you can find all the standard equipment and shipping The scope of delivery can be different in some circumstances because of some optional accessories which should not be included in the basic equipment Control Unit Carrying Strap Wireless Headphones Telescopic Rod Assembly OKM Power Pack amp Charger International Travel Adapter User s Manual PPP YP bek YP PP bei Shipping Carton 36 cm Search Coil 1 e e KN FP PP PP PP be bei 16 cm Search Coil optional 150 cm x 150 cm Search Coil optional 1 12 V Car Charger optional optional Table 1 Scope of delivery In the event that there is an item that is missing within the scope of delivery a Packing List or Lieferumfang upon receipt of your Black Hawk contact the dealer immediately OKM GmbH www okmmetaldetectors com CHAPTER 4 Assembly This section explains how to assemble and prepare the Black Hawk unit for operation 18 The main unit mounts directly to the mounting bracket on the hand grip and the search coil mounts to the coil connector of the Telescopic Rod Assembly Mounting bracket on the hand grip Forearm Brace Search Coil Connector Hand Grip Illustr
5. kk ka 19 Illustration 4 5 Control unit mounted to bracket ooooocncnococonononononononononononcnconononononconcnnonno kk 19 Illustration 4 6 Telescopic Rod end o ococcocorncncncncononononononononononono noo ro non on kek kek rn corona nono nononononconccnrononos 19 Illustration 4 7 Search Coil mounted to Telescopic RO M L keke ke keke keke k kek kek k 19 Illustration 4 8 Corner ready for assembly eae 20 Illustration 4 9 Corner assembled cccececencscsescscscscececececsceceseseseseesecececeaeaccsestesetesesstsceseseseseseeseess 20 Illustration 4 10 create a loop in the cable to insert into straight pieces cece cece ec kk 20 Illustration 4 11 Fully assembled coil frame kk k kek keke kek k kek k k ek k 20 Hinstratio n 4 12 Connecting the Seas its 21 Illustration 4 13 The 150 cm x 150 cm coil can be carried by 1 or 2 people h h kn 21 Illustration 5 1 Complete VIEW AAA 23 Illustration 5 2 Bottom of unit showing the mounting Clip assa 23 Illustration 5 3 Rear of unit showing battery and coil connectors ocococcccncncncncnnononononcnncnconcnncnncnncnnanono 24 Illustration 5 4 Right side unit controls assez 24 Mustration 5 0 Main SC CON EEE 29 Illustration 5 6 Left side of the control unit zenera 29 VE US i STS 0 Delay gazia EAEE 26 Illustration 5 8 Interference Screen AAE 26 Hiustrat
6. Connect a fully charged battery to the Black Hawk unit 2 Hold the unit 5 to 10 cm above the ground 3 Turn on the unit and after 8 to 10 seconds the display will turn on 4 Set the volume to the desired level or set to low and turn on the wireless headphones OKM GmbH www okmmetaldetectors com 30 Set the values to 50 for the Delay and Interference Set the value to O for the Threshold and Sensitivity Slowly turn the Interference knob until the high frequency pitch becomes quiet It should be set directly at the point where it is muted Very slowly turn the Delay knob in the other direction until a Ticking sound is heard The desired tick rate is about 3 5 ticks per second To fine tune the tick rate use the Threshold knob 6 3 Calibration of Discrimination After the unit has been ground balanced the unit must be calibrated to discriminate between ferrous and non ferrous metals This is a very simple procedure 1 2 Find a clear area that does not have metallic objects Push the Calibration button During the calibration process the monitor shows Calibration Swing the unit level to the ground left and right until the monitor returns to normal Go over a piece of ferrous metal to see the FE indication on the screen 6 4 Operation The unit needs to swing slowly over the ground or area to be scanned It is important not to change the height of the coil during the scanning proc
7. DO NOT store it in places that could get extremely hot e DO NOT leave it in the trunk or boot of a car where high temperatures could build up e DO NOT spray lubricants or any type of cleaners solvents sealants or other chemicals into or onto the electronic parts switches or controls e DO NOT attempt to modify or repair the detector s electronics as this will void your detector s warranty e DO clean your unit with a soft dry or slightly damp cloth to remove dust and residue from the previous use e DO use the device within the proper operating guidelines e DO use the detector with the proper power pack as to not cause damage to the unit The warranty does not cover damage resulting from an accident neglect or abuse OKM GmbH www okmmetaldetectors com 12 1 6 Protecting Your Investment Often detector users become disappointed when their new detector slowly becomes less and less responsive and seems to have lost some of its original peak performance You can help prevent this from happening to your detector by following these basic care and protection guidelines e Operate your detector exactly as recommended in this Operator Instruction Manual e Use only the OKM Power Pack or other approved power supplies e The search coil cable is hard wired to the search coil and protected by a stress relief Inspect the stress relief frequently to make sure it is firmly attached and intact e Keep cables pro
8. IA Us A A a O ya tziara ra EA el na aerea ebate AAA 10 Lo Malnlenance and gre eae 10 1 4 Danger of Explosion during OEK aziz elena 10 EA AAE Li Lo Precio rour lol ne Da AAE 12 Pal Halle Banaiz Cl Ta a E S E gg 13 Al zuenaz E bezo AAA 14 e EAEE 14 A mg mme 14 A A ome UE EE 15 A eka eNA 17 EL Mounting the Main UNIL AAE 19 5 Monnina HE eeta e AA 19 4 3 Assembling the optional 150 cm x 150 cm Search Coil s ssessessesesseseessesessesseseesoesessesoeseessseeesee 20 EEE izar 22 ea B ae T EE 23 SLL O O VOE EEE EAEE 24 ed E Display Brightness LED BREA PAS ca EE EE rrr 25 PERA PP O 20 a aA 26 SE Nabe gaa e aA 26 geek egiazta b 26 E o POE PEO a 26 Na alika LON DO toi oboe 2l AP e III o HEHE NDEDBDMR BM JM MZ ZZ lt MRI Z M Z Zna nD DM M T 28 L igez e ton Dent AEE 29 ZE graeia e anek aA 29 tu es AL zieak gie Ee Dil0 TI T nd geau BE 30 P EU LN I EEE E E T TE E E E E E E E E 30 PED AEE i PI E E E E tear decane E A 31 A a dT e erl aurata dA 33 OKM GmbH www okmmetaldetectors com 8 Troubleshooting OKM GmbH www okmmetaldetectors com Illustration Index Illustration 4 1 Telescopic Rod to mount the search coils and main unit M k 18 Illustration 4 2 Rod Shaft Lock in the locked position assez 18 Illustration 4 3 Rod Shaft Lock in the unlocked position 2 0 0 0 K keke kek k 18 Illustration 4 4 Shows the control unit ready to mount to bracket k l
9. developments in terms of further quality improvements for you By purchasing or using one of our products we cannot guarantee that during the course of your research that you will be successful and have a find The recognition of hidden and buried objects depends on a huge number of factors As you well may know there are different soil types all over the world with different levels of natural attenuation Variable soil properties can and will hamper and alter ultimate scan measurements Areas where there is an extreme amount of ground water varying clays sands and wet soils making scanning more difficult and may reduce the maximum depth capabilities of any and all detection equipment regardless of make or model For more information regarding where this equipment has been used and operated please visit our website Our equipment is constantly being tested and when improvements or upgrades are available we will list them also on our website It is necessary for our company to protect our developments and all of the information learned during the Research and Development phases in creating our technology We strive to stay within the given framework of legislation patents and trademark registration Please take your time to read this User Manual and familiarize yourself with the operation functionality and how to utilize the Black Hawk We also offer training for your equipment in our factory and on site We strive to maintain world
10. especially if buttons rings or little pegs can be OKM GmbH www okmmetaldetectors com Introduction 11 identified or felt The same applies to recognizable ammunition or bullets and shells Leave that stuff where it is do not touch anything and most importantly do not take any of it home with you The killing machines of war made use of diabolical inventions such as rocker fuses acid fuses and ball fuses Those components have been rusting away in the course of time and the slightest movement may cause parts of them to break and be triggered Even seemingly harmless objects such as cartridges or large ammunition are anything but that Explosives may have become crystalline over time that is sugar like crystals have formed Moving such an object may cause those crystals to produce friction leading to an explosion If you come across such relics mark the place and do not fail to report the find to the police Such objects always pose a danger to the life of hikers walkers farmers children and animals 1 5 Care and Use The Black Hawk is a sturdy instrument but it is not designed to withstand abuse In caring for your Black Hawk there are several important DOs and DO NOTs to remember e DO NOT use it to beat bushes out of the way flatten area by swinging wildly or pry rocks loose e DO NOT drop the machine into water or use it while it is raining or wet e DO NOT leave it exposed at night where dew could form on it e
11. Sensitivity is usually increased to look for larger objects that are deeper in the ground Illustration 5 7 Delay Screen Interference Illustration 5 8 Interference Screen Threshold Illustration 5 9 Threshold Screen Sensitivity Illustration 5 10 Sensitivity Screen OKM GmbH www okmmetaldetectors com Control Elements 27 5 2 5 Calibration Button This function will perform the automatic ground balance of the built in magnetometer enabling the unit to discriminate between ferrous and non ferrous metals Calibration Button Illustration 5 11 Front of control unit For the person who is only looking for non ferrous metals discrimination is very important When the unit is not calibrated the detection of non ferrous metals still takes place The only difference is that ferrous metals will not have the FE sign show up in the main display screen After calibrating the Black Hawk the function of discrimination is automatic Please make note that some soil conditions may make it difficult to discriminate some metals OKM GmbH www okmmetaldetectors com 28 HERE JAPTER 6 Field Procedure This chapter gives practical instructions about the general procedure of scanning an area The different scanning methods and procedures will be explained in detail In this section you will learn more about the different operating modes of the Black Hawk Every function is ex
12. agnetic fields e high and long lasting heat effect To clean your device please use a clean and dry soft rag or cloth To avoid any damage you should transport the device and accessories always in the appropriate carrying cases Prior to using your Black Hawk please be sure that all batteries and accumulators are fully charged Also do not allow the batteries to completely discharge before recharging them This way your batteries will have a long and durable life When the unit is not in use recharge the batteries every 3 months so that they retain their performance To charge the external batteries use only the approved chargers which are part of our scope of delivery 1 4 Danger of Explosion during Excavation Unfortunately the last two world wars also made the ground in many places of the world a potentially explosive scrap heap A host of those lethal relics are still buried in the ground Do not start digging and hacking for an object wildly when you receive a signal of a piece of metal from your device Firstly you might indeed cause irreparable damage to a truly rare find and secondly there is a chance that the object reacts in an insulted way and strikes back Note the color of the ground close to the surface A red or reddish color of the ground is an indicator of rust traces As regards to the finds themselves you should definitely pay attention to their shape Curved or round objects should be a sign of alarm
13. an object has been found move the coil off to one side of the target area and slowly swing the coil over the area until it beeps directly over the target Make notes of the area where it begins to give an audio signal and where the signal begins to fade Where the signal becomes stronger that is the point of where the edge of the anomaly is and where the signal begins to fade is the other side 2 ue A 1 E 3 2 d Cy Illustration 6 2 Example of how to properly pin point a target i In illustration 6 2 we are showing the different positions that are necessary to properly pin point an anomaly From Position 1 sweep the detector over the anomaly then go to Position 2 repeat the process and then at Position 3 again When this is done from three different sides then you will know exactly how long and wide the anomaly is OKM GmbH www okmmetaldetectors com CHAPT d Optional Equipment 34 Here you can find additional information on accessories that can compliment the basic kit Keep in mind that the mentioned accessories are not included in the normal scope of delivery 16 cm Search Coil 150 cm x 150 cm Search Coil OKM Power Pack with charger and travel adapter Auto Charger for OKM Power Pack Please contact OKM or an authorized dealer for more information accessories or support OKM GmbH www okmmetaldetectors com Troublesho
14. arried by 1 or 2 people Illustration 4 12 Connecting the straps The straps can be carried by 2 people where each person has a strap or by 1 person by criss crossing the straps and carry the coil over the shoulder b Za HSE E n aye at ee b TZ LAME E A ara eng Edi b r a di SEK diz edi 5 To E EE ZE bai ES SEa OSK Ea Fs tin te a L aii OD EO Illustration 4 13 The 150 cm x 150 cm coil can be carried by 1 or 2 people OKM GmbH www okmmetaldetectors com 22 HAPTER 5 Control Elements In this section we explain more about the fundamental use of all control elements for the Black Hawk measuring instrument All connections inputs and outputs are explained in detail OKM GmbH www okmmetaldetectors com Control Elements 23 First we will explain the various ports and connectors Understanding the various functions makes it much easier to prepare the unit for operation Telescopic Rod b h Assembly aa Ia ag nd Main Unit with Display A pe D E and Controls Search Coil Illustration 5 1 Complete View In illustration 5 2 you can clearly see the mounting clip which is used to mount the unit to the Extension Shaft When mounting the control unit to the telescopic rod be sure that it locks into place usually indicated by hearing a click Mounting Bracket Calibration Button External Speaker Illustration 5 2 Bottom of unit showin
15. ation 4 1 Telescopic Rod to mount the search coils and main unit Adjusting the telescopic rod is very important To avoid straining any muscles and to allow for more comfort while working with the unit a properly adjusted telescopic rod is essential Illustration 4 3 Rod Shaft Lock in the Illustration 4 2 Rod Shaft Lock in the unlocked position locked position To adjust the telescopic rod length or the hand grip the tab locks needs to be opened as in illustration 4 3 Once opened the shaft you can extend or contract the rod to your desired length Once the desired length is reached simply lock the lever down as shown in illustration 4 2 Be sure that the hand grip is also properly adjusted for comfort OKM GmbH www okmmetaldetectors com Assembly 19 4 1 Mounting the Main Unit When the main unit is mounted to the telescopic rod it looks like that in illustration 4 5 Illustration 4 4 Shows the control unit ready Illustration 4 5 Control unit mounted to to mount to bracket bracket 4 2 Mounting the Search Coil Assembling the search coils to the telescopic rod is very simple Unscrew the nylon bolt be sure the rubber washers are seated next to the shaft Insert the end of the shaft onto the coil insert the bolt and tighten Finger tight only so that the coil does not move Make note that on the end of the telescopic rod there is a nylon bolt with 2 rubber washers these are important to keep the coil firmly in plac
16. e L 2 AS Dad Sie Illustration 4 6 Telescopic Rod end Illustration 4 7 Search Coil mounted to Telescopic Rod OKM GmbH www okmmetaldetectors com 20 4 3 Assembling the optional 150 cm x 150 cm Search Coil To assemble the 150 cm x 150 cm 5 x 5 search coil first unpack all of the components and lay them on the ground with the wire up and the clips up First assemble the corners of the search coil before assembling it completely In illustration 4 8 you will simply insert the connectors together to complete the assembly as shown in illustration 4 9 Be sure to feed the extra wire through the corners so they allow for the construction of the frame Illustration 4 8 Corner ready for assembly Illustration 4 9 Corner assembled When assembling the 150 cm x 150 cm search coil pull the extra cable and take out the slack the extra cable is there so that the unit can be folded together After all of the corners are assembled create a loop or twist in the cable and insert the extra cable into the straight pieces see illustration 4 10 Complete the assembly of the straight pieces see illustration 4 11 Illustration 4 10 create a loop in the cable to insert Illustration 4 11 Fully assembled coil frame into straight pieces OKM GmbH www okmmetaldetectors com Assembly 21 The straps to the 150 cm x 150 cm search coil must be mounted in order to carry the unit It can be comfortably c
17. edure If the unit is too close to the ground it is possible that the coil will receive feedback from the ground itself If this happens simply swing the coil a little higher above the ground In illustration 6 1 is a description showing the approximate time required to sweep from one side to the next side Qi DI br Illustration 6 1 Procedure for swinging unit from side to side OKM GmbH www okmmetaldetectors com Field Procedure 31 Practice a smooth sweep of the search coil from side to side keeping the coil close to the ground throughout the swing Each pass of the coil should take approximately 3 seconds from right to left 3 seconds to return from left to right Walk forward slowly Take small steps no greater than half of a normal stride Make sure each pass of the coil overlaps the last by at least half the length of the loop Do not lift the coil at the end of each swing Keep it close to the ground and at the same height at all times To become comfortable sweeping the loop does take some practice Relax loosen up and find a comfortable grip on the handle Premature fatigue may result from gripping the handle too tightly an improperly adjusted rod or elbow support and limited body movement Hold the handle loosely Adjust the rod and elbow support for comfort and keep the elbow strap loose Use your arm shoulder and even your back a little to allow for a smooth even sweep of the coil 6 5 Pin Pointing Once
18. g the mounting clip The external speaker shown in illustration 5 2 is controlled by the ON OFF and Volume control knob It Should be inspected after each use to ensure that there is no debris sand water or any other contaminants that may have entered the unit during operation 5 1 General Controls There are seven controls on the Black Hawk unit On the right side of the unit there is the ON OFF and Volume Brightness and LED light On the left side of the unit is the Delay Interference Threshold and Sensitivity control On the front of the unit is the Calibration Button OKM GmbH www okmmetaldetectors com 24 In illustration 5 3 you see the LED that can illuminate your path in the dark the battery connector and pt the search coil connector LED for night searches Search Coil Connector Battery Connector Illustration 5 3 Rear of unit showing battery and coil connectors The battery and search coil connectors are color coded to make for a quick and easy assembly of the unit Display Brightness Monitor Display Calibration Button ON OFF and Volume Illustration 5 4 Right side unit controls 5 1 1 On Off Volume The illustration 5 4 shows the ON OFF Volume knob This control will turn the unit on and off as well as control the volume of the internal speaker The unit requires between 8 and 10 seconds to start The wireless headphones can be used When the unit is t
19. he trunk or back of a pickup truck e Protect your detector from dust moisture and extreme temperatures during storage e When shipping use the original factory carton or similar heavy duty container and provide sufficient padding around all parts e Treat your detector as you would any sensitive electronic instrument Though it is designed to withstand the demands of normal treasure hunting proper care is essential OKM GmbH www okmmetaldetectors com ae Techni nica Specificatio ns 14 The following technical specifications are medial values During operation slight variations are possible 2 1 Control Unit Dimensions Ek bid W RA EE 80 x 160 x 210 mm DL a AAA about 1 kg jT _w u aa z ereoe bbbp rmrm mrrrmomoea EEN 12 VDC 5 6 W maximal BARREA e IP40 Operating Time fully charged Power Pack 25 C oococccococococononcnnonconcnncnncnncncnnono approximately 6 hours IBAR ASAN 110 mm Diagonal 400 MCD 480 x 272 Pixel TFT Color PTO CCS AE OMAP 3530 600MHz Power VR CCG BOE ata acoustic visual Oneratindo ganza ebazala 5 Cto 40 C Storage temperature asse 20 Cto 60 C Ar A azie e 9 to 75 e aea No 2 2 Search Coil oo MM E aeeeeebebebeebeebebeeeenn SCMI 15 D MONO Sa BEE 110 Hz 15 High Voltage Pulse Induction 2 3 Power Pack Lithium Polymer Accumulator nai Output Voltage 12 7 VDC AP b n k bab b h b b d d an n b
20. ion 0 9 Threshold SCTE bukata ar eea aN Earra akaz eke tak 26 HUR 0 60 Sensitivi Soren dada 26 Illustration 5 11 Front of control unit ooooconcnccncncncncncncnnncncnnnnonononono nono non keke k k keke kek keke ke k k 27 Illustration 6 1 Procedure for swinging unit from side to side L aaa 30 Illustration 6 2 Example of how to properly pin point a target L kk kk ke k k 31 OKM GmbH www okmmetaldetectors com CHAPTER 1 Introduction 1 1 Preface Dear customer all of the engineers sales training and support staff at OKM GmbH would like to thank you for your purchase of the Black Hawk metal detector The Black Hawk pulse induction detector works on the principle of a time sensitive oscillator which produces an alternating current that passes through a coil producing an alternating magnetic field This alternating magnetic field creates an eddy current which can detect electrically conductible metal It uses the induction of a high voltage energy pulse to identify the presence of metals The Black Hawk is able to locate buried objects within various structures and vessels non intrusively without having to excavate the area The facile and flexible handling of the Black Hawk can easily and quickly give reproducible results With our team of specialists we guarantee that our products are under recurrent control Our specialists try to implement new
21. ivity Interference wSITIL ESI ST Po ker Calibration Button Threshold Delay Illustration 5 6 Left side of the control unit By using these controls you will adjust the search coils to specific soil conditions OKM GmbH www okmmetaldetectors com 26 5 2 1 Delay The Delay knob as shown in illustration 5 6 controls the speed and timing in which the pulses are received In conjunction with the Interference the timing can be properly set When this function is used properly there will be a ticking sound It should tick approximately 3 5 ticks per second 5 2 2 Interference The Interference knob as shown in illustration 5 6 controls the course tuning element that assists with the Delay Initially after the unit is turned on the Interference button will be adjusted so that the sound is just muted Afterward the Delay function is used for finer tuning 5 2 3 Threshold The Threshold knob as shown in illustration 5 6 controls the object size filter Turn it to 0 to get response from all objects of any size While setting it to a higher value the detector only responds to larger metal objects and skips the smaller ones 5 2 4 Sensitivity The Sensitivity knob as shown in illustration 5 6 is used to either increase or decrease the sensitivity of the receiving search coil The size of the coil will determine where the Sensitivity needs to be set For example when using the larger search coil the
22. oting 35 HAPTE R Troubleshooting In this chapter we will discuss frequently asked questions OKM GmbH www okmmetaldetectors com 36 The most common problem is that the battery is low or in need of a charge In every case please ensure that the battery is fully charged Questions Answers Why do have to constantly change the delay Why is it so hard to balance the unit Why does it beep and there is no target There is a target then it goes away why hear a target then can t find it again why don t see anything in the display don t hear any tones OKM GmbH www okmmetaldetectors com
23. perly wound around the extension pole and protect them during use Floppy pinched or damaged cables may short causing unnecessary replacement of the search coil e Sweep the search coil carefully especially when using around rocks and building foundations Avoid hitting the search coil against hard solid objects and surfaces e Keep your search coil slightly off of the ground during the sweep especially when using in gravel or hard rocky dirt e 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 e 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 connectors to become submerged in water 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 e After each use clean the detector with a soft cloth to remove dust moisture or other contaminants e 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 t
24. plained in the following subsections OKM GmbH www okmmetaldetectors com Field Procedure 29 The Black Hawk metal detector is actually a dual detector Besides the pulse induction metal detector there is also a built in magnetometer which enables the unit to discriminate between ferrous and non ferrous metals When a ferrous metal is detected there is a notification which will appear on the display notifying you that the metal detected is ferrous It will show up on the top left portion of the screen as PES The Black Hawk is fully automatic in terms of knowing which detector coil is attached So whether it is the small coil or the large coil the unit knows where to set many of the automated processes The process of detection is done by using an eddy current An eddy current uses an electromagnetic induction to create a reaction within metals This reaction within the metals creates electrical conductivity or an anomaly which actually disturbs the flow of the current When this disturbance is realized the detector then reports the anomaly The surface of the material being detected must be accessible to the current Various finishes and coverings may cause bad or weak readings An alternating current in the coil generates a changing magnetic field The larger the coil the larger the field is With a large field only larger items can be found When using a smaller coil the field is also smaller enabling the detection of smaller items
25. urned on and you wish to use the headphones be sure to keep the volume low You can still adjust the volume of the headphones separately OKM GmbH www okmmetaldetectors com Control Elements 25 5 1 2 Display Brightness LED Light The illustration 5 4 shows the Display Brightness knob Use this control to either dim or brighten the monitor For working with the unit during the day most will adjust the monitor and make it very bright During the evening the monitor can be dimmed When the unit is dimmed to the low setting the LED light will illuminate to assist you for night searches When it is to the lowest setting then all illumination will be turned off no LED light and no monitor display 5 1 3 Monitor Display After turning on the detector the Monitor Display will Show the main screen accordingly to illustration 5 5 The main screen shows the signal curve as well as all of the sub screens for the search controls In a single instance one can see the other settings instantly When one of the Threshold Iiterference other controls are moved the screen will automatically change to the setting that is being changed Illustration 5 5 Main Screen 5 2 Search Controls In illustration 5 6 the controls on the left side of the unit are shown These are your primary controls to ground balancing the unit Half of the ground balancing process has been automated simplifying the task of ground balancing the unit Sensit
26. wide dealer network for assistance and support Please visit our web site for more information OKM GmbH www okmmetaldetectors com Introduction 9 1 2 Important Notes Prior to using the Black Hawk and its accessories please read these operating instructions carefully These instructions give information on how to use the detector and potential sources where precautions Should be taken 1 2 1 General Notes Being an electronic device the Black Hawk has to be treated with caution and treated with care as with any other electronic device Any failure to observe the safety precautions given or any use for purposes other than the ones it is designed for may result in damage or destruction of the processing unit and or its accessories or connected components The device has a built in anti tampering module which will destroy the unit if it is improperly opened There are no end user serviceable parts on the inside of the unit 1 2 2 Possible Health Hazards If used properly this device normally does not pose any health hazards According to current scientific knowledge the high frequency signals are not harmful to the human body on account of their low power 1 2 3 Surrounding Area When moving this unit from a cold place to a warmer place watch out for condensation Do not operate the unit until possible condensation has evaporated The unit is not weather or water proof moisture within the electronics can destroy the unit
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