3
Tips and information on metal detection
• In some cases, live cables in walls may not be accurately displayed. For this
reason, do not rely solely on the results of the detector to locate the position of
live and therefore hazardous cables. In addition to detecting with this device,
other detection aids such as design drawings or the detection of cabling or pipe
entry points should also be used.
• If live cables are laid in the wall, make sure that the power, gas and water are
switched off before you start drilling or other work that could damage cables.
•
Concrete, brick and ceramic surfaces partially shield electrical field signals. The
detection of AC signals will be impaired when you use the device over these
materials.
• AC signals are easier to detect when a load is connected to the desired
conductor and switched on, which then generates a current flow.
• Detection signals from “live” cables are dispersed from both sides of the cable,
therefore the area of the “live” cable often appears much larger than the actual
cable.
• AC signals come mainly from live cables and can also originate from static or
induced electricity in the vicinity. Before taking a measurement, place your hand
on the wall next to the device to dissipate any static or inductive electricity that
may be present.
• The signal strength of a live conductor depends on the installation depth of the
cable. For this reason, take further measurements in the vicinity or use other
information to search for cables.
• Caution! Energized cables which are not carrying a current may be detected as
metal objects, and thin wires may not be detected at all.
4
Locating metal objects
The detection depth is shown on the LCD display (10). It is adjustable from 20 to
38 mm. The maximum detection depth for hidden metals is 100 mm, and for other
metals as follows:
Ferrous
100
mm
Non-ferrous metals (mostly copper)
80 mm
Copper wires (≥mm2)
40 mm
Non-metallic objects (mostly wooden strips)
20 mm/38mm
51
