Instruction Manual - Indian Nations Detectors

A Simple Detecting Exercise
19
Before attempting to recover real targets, it is
important to understand how to interpret the
audio and visual signals of the detector.
Gather a collection of different metal objects,
e.g. various coins, gold and silver jewellery, a
nail, pull-tab, brass button and aluminium foil.
Take the detector outdoors, away from known
sources of EMI and metal objects.
Lay objects in a line, sufficiently spaced apart
to allow the coil to pass between them, as
shown below.
Detector Sounds
Turn the detector On.
The detector may produce False Signals
(Noise) when not over the ground or with the
coil held motionless. These may not be target
signals, but surrounding electromagnetic
interference (EMI). You can minimise these
False Signals by performing a Noise Cancel
(p. 27), or by reducing the Sensitivity (p. 26)
of the detector. It is generally better to try
to reduce False Signals by adjusting Noise
Cancel before resorting to reducing
the Sensitivity.
The constant background ‘hum’ produced by
the detector is called the Threshold (p. 27).
Variations in the Threshold allow you to hear
very small and deep targets. It is also used
to help distinguish between desired and
undesired targets.
Sweep the coil across the targets one at
a time. Observe the LCD and listen to the
sounds of the detector as it passes over
each object. Although the LCD will give you
detailed information about the target, it is
important to pay attention to the difference
in audio response between each of
the objects.
Note: If you are getting signals from a
visibly clear patch of ground, there could be
buried metal objects. Try finding another
area to practise.
Nail Pull-Tab Foil Coins Jewellery