OKM FS Future GeoSeeker Mini User manual

FS Future Series®
GeoSeeker Mini
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 responsibility for errors in this manual
or for any incidental or consequential damage or loss associated with the delivery, e ploitation 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 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
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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 – 2018 OKM GmbH. All rights reserved.

3
Table of contents
1 Introduction ........................................................................................................................................... 7
1.1 Preface ........................................................................................................................................... 8
1.2 Important Notes ............................................................................................................................. 9
1.2.1 Security Guidelines ................................................................................................................ 9
1.2.2 General Notes ........................................................................................................................ 9
1.2.3 Surrounding Area ................................................................................................................... 9
1.2.4 Voltage / Power Supply ......................................................................................................... 10
1.2.5 Maintenance and Services ................................................................................................... 10
1.2.6 Danger of E plosion during E cavation ............................................................................... 10
2 Technical specifications ....................................................................................................................... 13
2.1 Control Unit ................................................................................................................................. 14
2.2 Electrode ...................................................................................................................................... 14
2.3 Cable Drum with Power Cable and Voltage Cable ........................................................................ 14
3 Scope of delivery .................................................................................................................................. 15
4 Control elements .................................................................................................................................. 17
4.1 Control Unit ................................................................................................................................. 18
4.2 Cable drums with power cables and voltage cables ..................................................................... 19
4.3 Electrodes .................................................................................................................................... 20
5 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
6.3.3 Setting up the power injection ............................................................................................. 39
6.3.4 Processing a measurement ................................................................................................... 41
7 Analyzing a Measurement .................................................................................................................... 43
7.1 Interpretation of scan values ....................................................................................................... 44
7.2 Interpretation of graphical representations ................................................................................. 45
7.3 E amples ...................................................................................................................................... 46
7.3.1.1 Water Deposits ............................................................................................................. 46
7.3.1.2 Water deposits with areas of high resistivity ................................................................ 46
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4
7.3.1.3 Cavities ......................................................................................................................... 47
7.3.1.4 Impervious layers ......................................................................................................... 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
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5
Table of figures
Figure 4.1: Control elements of the Power Bo ....................................................................................... 18
Figure 4.2: Elements of the power cable drums ..................................................................................... 19
Figure 4.3: Elements of the electrodes ................................................................................................... 20
Figure 5.1: Main menu ............................................................................................................................ 22
Figure 5.2: Adjusting the ma imum depth .............................................................................................. 22
Figure 5.3: Adjusting the number of scan points .................................................................................... 23
Figure 5.4: Adjust marker positions for ne t scan .................................................................................. 23
Figure 5.5: Measuring the current scan point ........................................................................................ 24
Figure 5.6: Measure values as indicated during a measurement ............................................................ 24
Figure 5.7: Move all equipment to the ne t scan point ........................................................................... 25
Figure 5.8: 2d graphic of a completed measurement .............................................................................. 25
Figure 5.9: Select empty memory slot .................................................................................................... 26
Figure 5.10: Save measurement to memory ........................................................................................... 26
Figure 5.11: Memory slots ...................................................................................................................... 27
Figure 5.12: 2d graphic of a measurement ............................................................................................. 27
Figure 5.13: Delete stored measurement ................................................................................................ 28
Figure 5.14: Support Information ........................................................................................................... 28
Figure 5.15: Brightness .......................................................................................................................... 29
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 during a measurement ............................................................ 44
Figure 7.2: Graphical 2d representation of a measurement ................................................................... 45
Figure 7.3: E ample of a water deposit .................................................................................................. 46
Figure 7.4: E ample of a water deposit and barrier ............................................................................... 46
Figure 7.5: E ample of a cavity ............................................................................................................... 47
Figure 7.6: E ample of an impervious layer / barrier ............................................................................. 47
Figure 8.1: Electrodes need good electrical ground contact ................................................................... 50
Figure 8.2: Electrodes have to be equally set into the ground ................................................................ 50
Figure 8.3: Operating the GeoSeeker Mini with 3 people ....................................................................... 51
Figure 8.4: Operating the GeoSeeker Mini with 5 people ....................................................................... 51
Figure 8.5: Drilling a hole and refilling it for the electrode .................................................................... 52
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1 Introduction
CHAPTER 1
Introduction

8 Introduction
1.1 Preface
Dear Customer,
first of all we would like to thank you in choosing a product manufactured by OKM. The present product
is based on a geoelectrical measuring method utilizing the Schlumberger technique to measure the
resistivity of different soil layers.
With our team of specialists we guarantee that our products are under recurrent control. Our specialists
are constantly implementing new developments in terms of further quality improvements for you. Of
course by selling our products we cannot guarantee that you will make a find during your research. The
recognition of hidden structures depends on a huge number of factors – as you are already aware of.
Determining factors like the dielectric constant of the ground, the grade of mineralization and the
conductivity of different soils. Especially 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 site.
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 the time to read this User Manual and familiarize yourself with the operation, functionality
and how to utilize the GeoSeeker Mini. We also offer training for your equipment in our factory. We
strive to maintain a worldwide 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 GeoSeeker Mini and its accessories, please read these operating instructions carefully.
These instructions give information on how to properly use this geoelectrical detector and shows
potential sources where precautions should be taken.
1.2.1 Security Guidelines
The GeoSeeker Mini has a ma imum output of 320 V and 0.4 A even if it is not present at all times. But
under some circumstances the ma imum output can be present at the electrodes of the GeoSeeker Mini.
Therefor you have to take special care when handling the electrodes:
•Do not touch any of the electrodes when measuring is in progress.
•Before replacing any of the electrodes unplug the connecting cable to isolate the electrodes from
active power supply.
•Do not initiate any measuring as long as someone is handling the electrodes.
•Instruct all your helpers and assistants concerning these security guidelines to avoid
unnecessary injuries.
1.2.2 General Notes
Being an electronic device, the GeoSeeker Mini 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.
There are no end user serviceable parts on the inside of the unit.
1.2.3 Surrounding Area
When moving this unit from a cold place to a warmer place, watch out for condensation. Do not
immediately operate the unit until any possible condensation has evaporated. The unit is not weather
proof and water, moisture or condensation can destroy the unit.
Avoid strong magnetic fields, which may occur in places where there are large electric motors or
unshielded loudspeakers. Try to avoid using this equipment if someone else is using this type of
equipment closely.
Avoid using this equipment around active military installations and airports or where there may be other
devices that may hamper the signals received. Radars for aircraft, boats and weather reporting may
lower the units capabilities.
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10 Introduction
1.2.4 oltage / Power Supply
The power supply should not be outside the indicated range of values. Use only approved chargers,
batteries and rechargeable batteries which are included in the scope of delivery. Only use the
recommended type of batteries or rechargeable batteries as indicated in this user's manual.
1.2.5 Maintenance and Services
In this section you will learn how to maintain your measuring instrument with all of its included
accessories. This will keep it in good condition a long time and you will be able to get good measuring
results.
The following list indicates what you absolutely should avoid:
•penetrating water
•strong dirt and dust deposits
•hard impacts
•strong magnetic fields
•strong microwave fields
•high and long lasting heat effect
To clean your device please use a dry soft cloth. To avoid any damage you should always transport the
device and accessories in the appropriate carrying cases.
Prior to using your GeoSeeker Mini please be sure that all batteries and accumulators are fully charged.
Also allow the batteries to completely discharge before recharging them, regardless if you are working
with the e ternal 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
e plosive 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, especially if buttons, rings or little pegs can be
identified or felt. The same applies to recognizable ammunition or bullets and shells. Leave that stuff
alone and where it is, do not touch anything and, most importantly, do not take any of those items home
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Introduction 11
with you. The killing machines of war made use of many 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. E plosives 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 e plosion. If you come
across such relics, mark the place and do not fail to report the find to the police or proper authority.
Such objects always pose a danger to the life of hikers, walkers, farmers, children and animals.
OKM GmbH
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2 Technical specifications
CHAPTER 2
Tec nical specifications

14 echnical specifications
The following technical indications are medial values. During operation small variations are quite
possible. Technical changes due to development are also possible.
2.1 Control Unit
Dimensions (H W D) .............................................................................................. 410 340 180 mm
Weight ............................................................................................................................................. 4.50 kg
Input (ma .) ................................................................................................................... 11 - 13 VDC, 30 W
CPU ............................................................................................................................... 80 MHz Corte M3
ADC ................................................................................................................................................... 16 bit
Effective Range (differential) ....................................................................................... -1400 to +1400 mV
Input Resistance (static) ...................................................................................................... appro . 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, 480 320 Pi el
Display CPU ........................................................................................... Corte M3, 32 MHz, 128 KB RAM
Data memory ....................................................................................................................................... 4 GB
Output (ma .) ........................................................................................................................... 320 V, 0.4 A
Operating Time (average Power) .................................................................................. appro . 6 - 8 hours
2.2 Electrode
Dimensions (L W D) ................................................................................................. 270 120 35 mm
Weight ............................................................................................................................................. 0.40 kg
2.3 Cable Drum with Power Cable and oltage Cable
Dimensions (H W D) .............................................................................................. 360 290 200 mm
Weight ............................................................................................................................................. 3.60 kg
Power Cable Length .......................................................................................................................... 100 m
Power Markers ........................................................................................................................................ 10
Voltage Cable Length .......................................................................................................................... 10 m
Voltage Markers ...................................................................................................................................... 10
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3 Scope of delivery
CHAPTER 3
Scope of delivery

16 Scope of delivery
In the following section you can find all standard equipment and optional 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
Exten ion cable, 2 m (6 ft) 2
Electrode 4
Power Pack with charger and travel adapter 1
U er manual 1
Table 1: Scope of delivery
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4 Control 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 e plained in detail.

18 Control elements
4.1 Control Unit
The control unit is used to inject electrical power into the underground which could be measured
afterwards. Figure 4.1 shows all the control elements of the control unit.
Sockets for power cable: Use these red sockets to plug in the connectors of the power cables, that are
reeled on the cable drums. During measurements, these are the output sockets for the power injection.
Sockets for voltage cable: These black sockets are used to connect the voltage 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 e ternal Power Pack for
appropriate power supply.
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Figure 4.1: Control elements of the Power Bo
Socket for Power Pack
Left socket for
voltage cable
Electrodes
Holder for
Electrodes
Right socket for
voltage cable
Left socket for
power cable
Compartment
for cables and
accessories
Right socket for
power cable
Display with touch
screen

Control elements 19
Compartment: The compartment is used to store the Power Pack and all kind of accessories like
e tension cables (2 m) and charger.
Electrodes: The electrodes are stored in the top of the carrying case by clipping it into the designated
clips. There are two Power Electrodes with a red socket as well as two Voltage Electrodes with a black
socket. The Power Electrodes are used to inject power - generated by the control unit - into the ground.
The Voltage Electrodes are used to measure the voltage of the underground.
4.2 Cable drums with power cables and voltage cables
There are 2 cable drums, each with 100 m of cable. Those are used to connect the Power Electrodes
(electrodes with red socket) with the control unit. Additionally there are two 10 m cables coiled 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 e tension 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 drum are labeled with 10 markers in total. This
markers are numbered from 1 to 10 and will help you to place the electrodes at the right position during
the measurement.
Voltage cable with markers: The voltage cable (10 m) is also labeled with 10 markers in total. This
markers are numbered from 1 to 10 and will help you to place the electrodes at the right position during
the measurement.
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Figure 4.2: Elements of the power cable drums
Socket connector for
e tension cable
Plug connector
Power cable
with markers
Voltage cable
with markers

20 Control elements
4.3 Electrodes
There are 4 electrodes in total, 2 electrodes with a red socket (Power Electrodes) and 2 electrodes with
a black socket (Voltage Electrodes).
andle / Shaft: Use the handle to push the electrode'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.
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Figure 4.3: Elements of the electrodes
Shaft
Socket
Handle