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Future Series
VLF emitter
8
User’s manual
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User’s manual: VLF emitter 2
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 savety 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 – 2007 OKM Ortungstechnik GmbH. All rights reserved.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 3
Contents 3
Contents
1 Preface 5
2 Technical Specifications 6
3 Usage 7
3.1 Very Low Frequency Sender (VLF) . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.1 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.2 Usage of the VLF Sender . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.3 Safety Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Maintenance and Services 11
OKM Ortungstechnik GmbH
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User’s manual: VLF emitter 4
List of Figures
1 Control Elements of the VLF Sender . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Connection of Sender Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Connection of the Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Placement of the VLF sender on a site . . . . . . . . . . . . . . . . . . . . . . . . 9
List of Tables
1 Technical Specifications (Control Unit) . . . . . . . . . . . . . . . . . . . . . . . . 6
OKM Ortungstechnik GmbH
www.okm-gmbh.de
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1 Preface 5
1 Preface
Dear customer,
in the first instance we want to thank you that you made your decision on a product of OKM
Ortungstechnik GmbH.
With our team of specialists we guarantee that our products are under recurrent control. Our
specialists try to implement new developments in terms of further quality improvements for you.
Of course by selling our products we cannot guarantee that you really make a find during your
research. The recognition of hidden objects and structures depends on a hugh number of factors
- like you know. Determining factors are the dielectricity constant of the ground, the grade of
mineralisation and the dimensions of an object relating to its depth. Specially in very wet soil,
clay and sand with high conductivity of the ground, recording of the me asured results can be
falsified strongly.
With this product you purchased a device which stood the tests in regular operation like all
other products of us. If you are interested in where our devices have gone into action please
visit our homepage.
For our company it is necessary that we protect our developments within the framework of existing legislation to a patent or trademark registration. Therewith we offer you a higher warranty
while using our products.
Please take your time consecutively, read this user‘s manual and familiarize yourself with the
utilisation and operation of this VLF emitter.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
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User’s manual: VLF emitter 6
2 Technical Specifications
The following technical indications are medial values. During operation small variations are
quite possible.
Dimensions (H x W x D) . .. . .. . . . . . . .. . .. . . . . . . .. . .. . . . . . . .. . .. . . . . . . . 25 x 22 x 17 cm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ca. 7.4 kg
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0– 50
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20– 60
Air Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5% – 75%
Waterproof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nein
Frequency Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 60 kHz
Amplified Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 W
Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 V
Operating Time (full charged battery) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . about 3 h
Charging Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . about 10 h
Maximal Sphere of Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . about 10 m
Table 1: Technical Specifications (Control Unit)
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 7
3 Usage 7
3 Usage
3.1 Very Low Frequency Sender (VLF)
With the VLF a sender is available which can optimize your search for metallic objects.
Socket of Charger
Security and
Operating Lamp
Power On- and
Off Button
Regulator of FrequencyRegulator of Capacity
Connection of Antenna
Figure 1: Control Elements of the VLF Sender
With the Power On- and Off Button the device can be switched on and off.
In the Socket of Charger the charger has to be connected to reload the internal batteries. The state
of the batteries can be surveilled and controlled with the Operating Lamps. If the batteries are
charged fully the operating lamps will shine green. With decreasing of the voltage the lamps
will change the color themselves from yellow to orange up to red.
The Regulator of Frequency is used to adjust the sending frequency.
The Regulator of Capacity the sending capacity can be adjusted.
In the Connection of Antenna the delivered antenna has to be connected.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 8
User’s manual: VLF emitter 8
3.1.1 Assembly
This section describes how to assemble the sender and prepare for a measurement.
Figure 2: Connection of Sender Antenna
In figure 2 you can see how to connect the sender antenna. The antenna is fixed up with the
velcro fastener on the outside of the VLF sender. Remove it and put in on the ground in a
distance of about 50cm from the sender.
Figure 3: Connection of the Charger
If the batteries are empty you have to reload them. Figure 3 represents how to connect the
charger.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 9
3 Usage 9
3.1.2 Usage of the VLF Sender
After you have attached the antenna and loaded the batteries completely you can operate the
VLF sender.
Beware that the Regulator of Capacity (LEVEL) is switched on 0 before power on the sender and
the antenna is put on the ground in a distance of about 50cm from the sender.
After powered on the device both Operating l amps has to shine green, otherwise you should reload
the batteries again.
Now adjust the desired frequency and capacity before scanning your area! With the Regulator of
Frequency you can select the desired sender frequency. Normally frequencies of less than 40 kHz
are used. The Regulator of Capacity is prosecuted generally between 50 and 100.
Figure 4: Placement of the VLF sender on a site
Place the four VLF sender in a square or rectangle and power on all sender. Now you can
execute a normal measurement in operating mode Ground Scan, see figure 4. By using the
VLF sender in particular all metallic objects will be enforced more than a measurement without
sender. Important is the c orrect adjustment of the parameters of frequency and capacity. An
exact specification is not possible because it is strongly depending on the particular ground
circumstances.
3.1.3 Safety Guidelines
It is absolutely necessary to beware the following safety guidelines, to guarantee a se cure work
with the VLF sender.
Do not hold any receiver, like metal detectors, probes or others directly over the sender
antenna during the operation of the VLF sender. The enforced field of the antenna can
destroy their electronics.
Keep a distance of at least 50cm between antenna and VLF sender. Avoid close contact
to the sender antenna during operation.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 10
User’s manual: VLF emitter 10
If a change of electrical fuse should be necessary, only fuses which are structurally identical
may be used, which value agrees with those on the equipment.
Power off the device before loading the internal batteries.
For charging use only the provided battery charger.
Power off the device if it is not any longer used otherwise the batteries can be damaged.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 11
4 Maintenance and Services 11
4 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:
penetrating water
strong dirt and dust deposits
hard impacts
strong magnetic fields
high and long lasting heat effect
If you want to clean your device please use a dry rag of soft material. To avoid any damage you
should transport the device and accessories always in the appropriate carrying cases.
Beware that all batteries and accumulators are always charged fully while operating with your
system. You should only load the batteries when they are completely discharged no matter if
you are working with the external power supply or with the internal accumulators. In this way
a long durability of the used batteries is guaranteed.
To load the external and internal batteries you have to use only chargers which are part of our
scope of delivery.
OKM Ortungstechnik GmbH
www.okm-gmbh.de
Page 12
Index
Connection of Antenna, 7
Operating Lamps, 7
Operating lamps, 9
Power On- and Off Button, 7
Regulator of Capacity, 7, 9
Regulator of Frequency, 7, 9
Socket of Charger, 7
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