False Signals; Interference - Renkforce MD 200 Notice D'emploi

• When the DISCRIMINATION dial (15) is set to the minimum position (no discrimination), the pointer will always
point to the right-hand side of the analogue display (21) and the metal detector will beep, regardless of which metal
or conductive substance is detected. In this mode, the metal detector does not distinguish between different types
of metals.
• When the DISCRIMINATION dial (15) is set to a higher position, certain types of metals are not detected. When a
non-ferrous metal/alloy is detected, the pointer will move to the right-hand side of the analogue display (21) and the
metal detector will beep. This enables you to concentrate on detecting more valuable metals.
When a ferrous/eliminated metal is detected, the metal detector will not beep, but the point will move to the
left-hand side of the analogue display (21) in "TR2" mode.

False signals

• A false signal occurs when the metal detector incorrectly indicates that there is a metal object. Move the detection
probe (1) over the position of the signal several times. If the signal is strong and consistent, this indicates that the
metal detector has detected an object under the ground. If the signal is irregular or inconsistent, this may indicate
a false signal.
• An oscillating signal is normally caused by external interference (e.g. fluorescent tubes, radios, electrical cables and
other metal detectors. This cannot be eliminated by adjusting the settings.
• Identifying false signals requires practice and experience.
c) Interference
False signals can occur for the following reasons:
• The sensitivity is too high.
• The metal detector was moved too quickly or at an incorrect angle.
The analogue display (21) indicated the wrong metal type.
• There are several different metal objects.
• The object consists of an alloy that the metal detector cannot recognize.
• The metal object is heavily oxidized.
• The sensitivity is too high.
• The more the pointer on the analogue display (21) moves, the larger the object (or the shallower the object for
smaller objects).
• The pointer on the analogue display (21) moves the most when the metal detector detects a highly conductive
metal. If the pointer on the analogue display (21) does not move significantly each time the search probe is moved
over the area that you suspect may contain an object, this probably indicates that there is only scrap metal.
• The success/accuracy of the metal detector depends on several factors. These include:
- The angle at which the object is inserted in the ground (detection area)
- The depth of the object
- The object's degree of oxidation
- The size of the object
- Electromagnetic and electrical interference (e.g. underground cables) in the vicinity of the object
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