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Conducting a measurement

39

6.3.3 Setting up the power injection

The power injection equipment consists of the control unit, the Power Cable Drums (100 m) as well as

the Power Electrodes with Extension Cable (2 m). All those parts are equipped with red plugs or red
sockets. This Power Line is used to inject electrical power into the underground to generate a potential

difference (fall of voltage).

Follow these steps to set up the Power Line for a measurement:

9. The   control   unit   is   already   placed   during   the

process of setting up the Voltage Line.

10. Now connect the plug of the first Power Cable

Drum into the appropriate socket of the control

unit.

11. Unroll   the   cable   of   the   Power   Cable   Drum   by

moving   away   from   the   control   unit   until   you

reach   the   cable   marker   indicated   by   the
measurement screen of your device.

OKM GmbH

www.okmmetaldetectors.com

Содержание FS Future GeoSeeker Mini

Страница 1: ...FS Future Series GeoSeeker Mini User s Manual ...

Страница 2: ...rranty In no circumstances OKM takes responsibility for lost profits usage or data loss 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 safet...

Страница 3: ...Operating Modes 21 5 1 New Measurement 22 5 2 Show Memory 27 5 2 1 View Measurement 27 5 2 2 Delete Measurement 28 5 3 Settings 28 5 3 1 Brightness 29 5 3 2 Support Information 29 6 Conducting a measurement 31 6 1 Basic Information 32 6 2 General Measurement Procedure 33 6 3 Setting up a measurement 36 6 3 1 Setting up your scan field with markers 36 6 3 2 Setting up the voltage measurement 37 6 3...

Страница 4: ...rs 47 8 Tips and Tricks 49 8 1 Improving your scan results 50 8 2 Speeding up your measurement 50 8 2 1 Operation with 3 people 51 8 2 2 Operation with 5 people 51 8 3 Measurements under tough soil conditions 52 OKM GmbH www okmmetaldetectors com ...

Страница 5: ...Figure 5 16 Support Information 29 Figure 6 1 Detection of thick objects is better than flat objects 32 Figure 6 2 Dividing the field into scan points and setting up markers 33 Figure 6 3 Power injection depth depends on electrodes distance 34 Figure 6 4 Instruction screen for setting up a measurement 34 Figure 6 5 Complete preparation for measurement 41 Figure 7 1 Measure values as indicated duri...

Страница 6: ......

Страница 7: ...1 Introduction CHAPTER 1 Introduction ...

Страница 8: ...in very wet soils like clay and sand with high conductivity or attenuation of the ground In certain conditions recording of the measured results can be falsified strongly For more information regarding where this equipment has been used and operated please visit our web site Our equipment is constantly being tested and when improvements or upgrades are available we will list them also on our web s...

Страница 9: ...ni has to be treated with caution and care as with any 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 The...

Страница 10: ...batteries to completely discharge before recharging them regardless if you are working with the external battery or with internal accumulators This way your batteries will have a long and durable life 1 2 6 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...

Страница 11: ... ammunition are anything but that Explosives may have become crystalline over time that is sugar like crystals within them have formed they are still dangerous and should be regarded as a potential killer 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 or proper...

Страница 12: ......

Страница 13: ...2 Technical specifications CHAPTER 2 Technical specifications ...

Страница 14: ...12 MΩ Data Sampling Rate 4096 Hz 64 times oversampling of a 512 samples mean value Measurement Period per Scan Point min 16 seconds Display 3 5 Resistive touch 480 x 320 Pixel Display CPU Cortex M3 32 MHz 128 KB RAM Data memory 4 GB Output max 320 V 0 4 A Operating Time average Power approx 6 8 hours 2 2 Electrode Dimensions L x W x D 270 x 120 x 35 mm Weight 0 40 kg 2 3 Cable Drum with Power Cabl...

Страница 15: ...3 Scope of delivery CHAPTER 3 Scope of delivery ...

Страница 16: ...l parts of the GeoSeeker Mini Description Quantity Control unit 1 Cable drum with power cable 100 m 328 ft 2 Voltage cable 10 m 33 ft 2 Extension cable 2 m 6 ft 2 Electrode 4 Power Pack with charger and travel adapter 1 User manual 1 Table 1 Scope of delivery OKM GmbH www okmmetaldetectors com ...

Страница 17: ... elements CHAPTER 4 Control elements In this section you will learn more about the fundamental use of all control elements for this measuring instrument All connections inputs and outputs are explained in detail ...

Страница 18: ...ltage cables 10 m These are the input sockets for measuring the voltage Display with touch screen The display indicates all measure states and allows you to configure and store your measurements It is equipped with a touch screen to operate the unit Socket for Power Pack This socket needs to be connected with the external Power Pack for appropriate power supply OKM GmbH www okmmetaldetectors com F...

Страница 19: ...d up in front of the cable drums These cables are used to connect the Voltage Electrodes electrodes with black socket with the control unit Socket connector for extension cable This socket is used to connect the extension cable 2 m and link it to a power electrode Plug connector Put the plug connector into the left or right red socket of the control unit Power cable with markers The cables of each...

Страница 20: ...s shaft into the underground as deep as possible You may use a hammer to do so The shaft is made of stainless steel to be robust against moisture and weird soil conditions Socket The socket is used to connect the cables whereas the red socket is used for the power injection and the black socket is used for measuring the voltage OKM GmbH www okmmetaldetectors com Figure 4 3 Elements of the electrod...

Страница 21: ...5 Operating Modes CHAPTER 5 Operating Modes This section explains the basic functionality and how to operate the GeoSeeker Mini ...

Страница 22: ...s well as getting information about firmware serial number and OKM contact details 5 1 New Measurement This is the option of your choice if you are going to create a new measurement There are some additional parameters to choose before the actual measuring takes place The first parameter you have to adjust is the maximum depth as shown in figure 5 2 Use the buttons and to change the depth value an...

Страница 23: ... placed into the ground If the number is written in red color than this value has changed in relation to the previous scan point A is the distance between left Power Electrode and control unit as well as the distance between control unit and right Power Electrode in terms of distance markers numbered from 1 to 10 In the example of figure 5 4 you have to place the Power Electrodes at marker 10 B is...

Страница 24: ...l be presented as shown in figure 5 6 All single measure values will be presented to the operator Detailed information about all measure values and its meanings can be found in section 7 1 Interpretation of scan values on page 44 You can also write down these values if you like to keep the results for own calculations or reports When you are ready to continue with the next scan point push the butt...

Страница 25: ...ues are presented as shown in figure 5 6 on page 24 push the button Now the screen from figure 5 8 appears Here you can see the graphical result of your measurement More details about this graphical representation can be found in section 7 2 Interpretation of graphical representations on page 45 Now you have to decide if you want to save this measurement into the internal memory If so you have to ...

Страница 26: ...is now saved into the memory of your device and can be reopened at later times If you do not want to overwrite an existing measurement push the button to get back to the memory slot selection After the measurement has been saved successfully you will be redirected to the graphical representation as shown in figure 5 8 on page 25 Push the button to leave this screen and go back to the main menu OKM...

Страница 27: ...d measurements you simply touch the equivalent memory slot button Now the data will be loaded and the resulting 2d graphic is displayed on the screen as shown in figure 5 12 According to the colors you can now analyze your measurement to find out if some interesting target is available Please read chapter 7 2 Interpretation of graphical representations on page 45 to learn more about the used color...

Страница 28: ...erwise push the button to go back to the memory screen 5 3 Settings In this section you will learn how to adjust different settings of your GeoSeeker Mini After selecting from the main menu the screen from figure 5 14 appears The following options can be selected Brightness Adjust the brightness of the display Support Information Shows information regarding firmware and serial number OKM GmbH www ...

Страница 29: ...e button This will automatically return to the settings menu 5 3 2 Support Information This option displays information regarding the device s serial number and firmware version as well as OKM s contact details Those information may be useful if you are contacting your local OKM distributor for additional support requests Push the button to return to the settings menu OKM GmbH www okmmetaldetector...

Страница 30: ......

Страница 31: ...6 Conducting a measurement CHAPTER 6 Conducting a measurement In this section you will learn how to conduct a measurement with GeoSeeker Mini ...

Страница 32: ...ll not reach its final depth The injected power always uses the easiest and most conductive way to flow through the underground soil Never conduct a measurement during or directly after a thunderstorm Lightning strikes are not only influencing your measurement they are also very dangerous while laying out the cables and putting the electrodes into the ground When conducting a measurement the surfa...

Страница 33: ...of those scan points from certain depths It is a good practice to mark each of that scan points with some kind of marker flag stick color point stone etc to speed up the final measurement So you have to measure the distances between the scan points only once during the preparation of your scan field and you can move your equipment from point to point easily afterwards In figure 6 2 you can see an ...

Страница 34: ...setting up a new measurement As soon as all parameters have been adjusted and the screen from figure 6 4 appears you have to put your electrodes at the correct positions into the ground You will now arrange all your equipment according to these instructions For our example it will be as follows A In this example each Power Electrode has to be placed in a distance of 5 m to the left and right of th...

Страница 35: ...t occur during your measurement You have to move the Power Electrodes red socket outwards to the next cable marker This will increase the depth of the current scan point You have to move the Power Electrodes red socket inwards to the previous cable marker This will decrease the depth of the current scan point You have to move the Voltage Electrodes black socket outwards to another cable marker sev...

Страница 36: ...ur scan field and find out how you are going to process your measurement 2 Prepare your scan field with scan point markers 3 Prepare your control unit and start a new measurement Adjust all parameters according to your field preparation 4 Place the control unit at the first scan point the one on the right side and put the Voltage Electrodes according to the device s instructions into the undergrou...

Страница 37: ...h black plugs or black sockets This Voltage Line is used to measure the generated potential difference of the Power Line that we will setup later 1 Place the control unit at the first scan point marker 2 Remove the voltage cable 10 m completely from the Cable Drums 3 Connect the first plug of the Voltage Cable with the control unit Make sure to use the end with the lowest marker number 1 OKM GmbH ...

Страница 38: ...by the measurement screen of your device Laying out the cable completely makes it easier to rearrange the electrodes afterwards 6 Put the Voltage Electrode next to the cable marker into the ground as deep as possible Use a hammer if necessary 7 Connect the Voltage Cable with the Voltage Electrode 8 Repeat steps 2 to 7 for the second Voltage Cable and Electrode OKM GmbH www okmmetaldetectors com ...

Страница 39: ...nto the underground to generate a potential difference fall of voltage Follow these steps to set up the Power Line for a measurement 9 The control unit is already placed during the process of setting up the Voltage Line 10 Now connect the plug of the first Power Cable Drum into the appropriate socket of the control unit 11 Unroll the cable of the Power Cable Drum by moving away from the control un...

Страница 40: ... as deep as possible Use a hammer if necessary 13 Use the Extension Cable 2 m and connect it with the Power Drum 14 Now connect the second end of the Extension Cable with the Power Electrode 15 Repeat steps 10 to 14 for the second Power Cable Drum and Electrode OKM GmbH www okmmetaldetectors com ...

Страница 41: ...n your GeoSeeker Mini as follows 1 Connect the Power Pack with the approriate socket While pushing the plug into the socket turn the plug around until it slips in 2 After switching on the Power Pack itself the GeoSeeker Mini will be powered on too After a short while you should see the main menu in the display OKM GmbH www okmmetaldetectors com Figure 6 5 Complete preparation for measurement ...

Страница 42: ... the current scan point Voltage failure If this screen appears the device cannot measure any voltage between the electrodes Please check all connections and make sure there are no cable breaks or unconnected plugs Then try again to measure the current scan point General measurement error Under extreme conditions it might be possible that your device is not able to induct enough power into the unde...

Страница 43: ...7 Analyzing a Measurement CHAPTER 7 Analyzing a Measurement In this section you will learn how to analyze a measurement by using the Android application ...

Страница 44: ...sistivity values are indicating a bad conductance which could indicate a high probability of cavities 7 1 Interpretation of scan values There are 3 basic values indicated after each single scan process So you will get a rough idea about the underground conditions while scanning the area The measure values are shown in figure 7 1 The available measure values are Voltage mV The voltage is measured i...

Страница 45: ...ductivity The color s meanings are Blue This color indicates a high conductivity and a low resistivity as typical for underground water deposits Yellow White This color indicates a medium conductivity and resistivity as typical for normal underground soil Red This color indicates a low conductivity and a high resistivity as typical for underground cavities or impervious layers After conducting a m...

Страница 46: ...lor of water deposits is blue The following 2d graphics are showing an indication of water in the ground 7 3 1 2 Water deposits with areas of high resistivity In this example you will find two different kind of anomalies at the same time There is an area of high resistivity at the top shown in red and yellow colors At the bottom of the graphic there is another area of high conductance very low res...

Страница 47: ...been refilled with any conductive material 7 3 1 4 Impervious layers A typical structure you can see after measuring in mountain areas are impervious layers or barriers under the ground This layer mostly appears at the transition of loosely soil to massive stone OKM GmbH www okmmetaldetectors com Figure 7 5 Example of a cavity Figure 7 6 Example of an impervious layer barrier ...

Страница 48: ......

Страница 49: ...8 Tips and Tricks CHAPTER 8 Tips and Tricks In this section you will get some additional tips you should consider during your measurements ...

Страница 50: ...s very deep into the ground all electrodes needs to be placed in the same depth as shown in figure 8 2 Only then an equal electrical distribution is guaranteed 8 2 Speeding up your measurement The electrodes have to be replaced a lot while conducting a measurement This is really tough when you are operating the device just by yourself So it is strongly recommended to work in a group of 3 or better...

Страница 51: ...ery recommended to use 3 walkie talkies to give instructions because the distance to the operator can be up to 100 meters depending on the depth settings Make sure each participant knows about the possible danger of high voltage 8 2 2 Operation with 5 people This situation is similar to the previous one but there are two additional persons responsible for the Voltage Electrodes black socket which ...

Страница 52: ...sible and you need more helpful tools like a drilling machine First drill a hole into the hard underground before placing the electrode After that the hole needs to be refilled with wet sand or other good conductive soil to create a good electrical contact to the surrounding environment as shown in figure 8 5 If you are working on really dry soil like sand you should use some water better salt wat...

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