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MD Sensor Modes
Detection Mode (Default)
Detection Mode is optimised for maximum
detection performance, and is the default MD
Sensor Mode used for initial searching of new
ground to detect targets.
In Detection Mode, the detection signal is
dynamically processed, meaning the Sensor Head
must be moving relative to the target (e.g. using
a normal sweeping search technique) in order to
register a detection response.
In Detection Mode, audio target responses have
pitch and volume that is proportional to received
target signal strength. Strong targets will be loud/
high‑pitched and weak targets will be quieter/
low‑pitched.
Detection Mode is optimised for target detection
and is more sensitive than Interrogation Mode
or Pinpoint Mode. Therefore, very small targets
detected in Detection Mode may not be detected
when using Interrogation Mode or Pinpoint
Mode. If this occurs, use Detection Mode to
pinpoint a detected target, rather than using
Pinpoint Mode.
Pinpoint Mode
Pinpoint Mode provides a static response such
that target feedback will be heard even if the
Sensor Head is stationary with respect to the
target. This mode is useful for locating targets.
To enable Pinpoint Mode, press and hold the
Trigger button.
When the Trigger button is released, the MD will
return to Detection Mode.
Pinpoint Mode is used to map a detected metal
target to discover its size and shape. For detailed
information on mapping a target using Pinpoint
Mode, see page 50.
30 | MD Overview
Pinpoint Mode can also be used to locate the
centre of a target. For detailed information on
locating the centre of a target using Pinpoint
Mode, read page 50.
Interrogation Mode
Interrogation Mode provides additional
information regarding the probable characteristics
of a target based on its response to the magnetic
field transmitted by the MD, including:
• Apparent target conductivity.
• Whether the target is ferrous or non‑ferrous.
• Whether the target is potentially a carbon rod
switch component.
In Interrogation Mode, audio responses consist of
a single 'beep' tone where the pitch corresponds
to the characteristics of the detected target.
• Ferrous targets sound very low‑pitched.
• Carbon Rod targets sound very high‑pitched.
• Non‑Ferrous targets will have a mid‑range pitch
response where the pitch is proportional to the
conductivity of the target.
To enable/disable Interrogation Mode, press and
release the Trigger button.
For detailed Interrogation Mode operation
information, see page 51.
MD Sensor Overload
When operating any of the MD Modes
(Detection/ Pinpoint/ Interrogation), very
large metal objects close to the Sensor Head
may overload the detector's electronics.
If this occurs, the Coil Overload
icon will flash on the LCD, and the
Overload Alarm will repeat until
the Sensor Head is moved away from the
source of the overload.
Overloading is not harmful to the electronics
of the detector.
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