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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 

"FE".

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. 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. 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.

Or

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Содержание FS Future

Страница 1: ...FS Future Series Black Hawk User s Manual...

Страница 2: ...anty 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...

Страница 3: ...e of Delivery 15 4 Assembly 17 4 1 Mounting the Main Unit 19 4 2 Mounting the Search Coil 19 4 3 Assembling the optional 150 cm x 150 cm Search Coil 20 5 Control Elements 22 5 1 General Controls 23 5...

Страница 4: ...4 8 Troubleshooting 35 Orient Detectors www orientdetectors com...

Страница 5: ...1 Fully assembled coil frame 20 Illustration 4 12 Connecting the straps 21 Illustration 4 13 The 150 cm x 150 cm coil can be carried by 1 or 2 people 21 Illustration 5 1 Complete View 23 Illustration...

Страница 6: ...1 Introduction CHAPTER 1 Introduction...

Страница 7: ...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 propert...

Страница 8: ...ge 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 condensatio...

Страница 9: ...o 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 perf...

Страница 10: ...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 DO NOT use it to beat bushes out of th...

Страница 11: ...er After the search coil is used in salt water rinse it and the lower stem assembly well with fresh water to prevent corrosion of the metal parts The search coil is waterproof but the electronics are...

Страница 12: ...2 Technical Specifications CHAPTER 2 Technical Specifications...

Страница 13: ...gonal 400 MCD 480 x 272 Pixel TFT Color Processor OMAP 3530 600MHz Power VR Feedback acoustic visual Operating Temperature 5 C to 40 C Storage temperature 20 C to 60 C Air humidity 5 to 75 Waterproof...

Страница 14: ...3 Scope of Delivery CHAPTER 3 Scope of Delivery...

Страница 15: ...ones 1 1 Telescopic Rod Assembly 1 1 OKM Power Pack Charger 1 1 International Travel Adapter 1 1 User s Manual 1 1 Shipping Carton 1 2 36 cm Search Coil 1 1 16 cm Search Coil optional 1 150 cm x 150 c...

Страница 16: ...4 Assembly CHAPTER 4 Assembly This section explains how to assemble and prepare the Black Hawk unit for operation...

Страница 17: ...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 sh...

Страница 18: ...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...

Страница 19: ...they allow for the construction of the frame 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 togeth...

Страница 20: ...ried by 1 or 2 people 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 Illustration 4 13 The 150 cm...

Страница 21: ...trol 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 Orien...

Страница 22: ...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...

Страница 23: ...trol 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 turned on and you wish to use the headphones be sure to...

Страница 24: ...rdingly 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 t...

Страница 25: ...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 on...

Страница 26: ...s 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...

Страница 27: ...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 Haw...

Страница 28: ...reated 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...

Страница 29: ...does not have metallic objects 2 Push the Calibration button 3 During the calibration process the monitor shows Calibration 4 Swing the unit level to the ground left and right until the monitor retur...

Страница 30: ...he 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 an object has b...

Страница 31: ...7 Optional Equipment CHAPTER 7 Optional Equipment...

Страница 32: ...ioned 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 c...

Страница 33: ...Troubleshooting 35 8 Troubleshooting CHAPTER 8 Troubleshooting In this chapter we will discuss frequently asked questions Orient Detectors www orientdetectors com...

Страница 34: ...arget Your coil is too close to the ground and it is receiving feedback There is a target then it goes away why Check your ground balance most likely you adjusted it in the field and have reset the un...

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