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 lamps 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 correct 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 secure 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
