OKM eXp 4500, User Manual

Page: 58 / 94

58 Operating Modes
7.3 Magnetometer
By selecting the Magnetometer operating mode from the main menu, you can scan the sub-surface for
ferromagnetic targets and areas of the soil with a low iron content. Also, you may view the oscilloscope
output on the monitor to be able to identify ferromagnetic materials in the ground.
The Magnetometer mode can be used with all the antennas except the FS-Thermoscan and the Antenna
for Tunnel Detection. As soon as you confirm the operating mode “Magnetometer”, the integrated
magnetometer will be adjusted to the current ground value of the antenna location.
Activate the Magnetometer only above a neutral soil. Afterward all the signals that go in the upward
direction (red) are the positive magnetic poles on a ferromagnetic object and all the signals that go
downward (blue) are the negative magnetic poles. When activating the Magnetometer mode, be sure
that you are not above a piece of iron or metallic object, this can cause a false ground balance and
produce erroneous results.
If you realize that the function was activated over a piece of metal, simply restart the process again in a
clear area of the soil.
OKM GmbH
www.okmmetaldetectors.com
Illustration 7.15: eXp 4500 Main Menu