Interpreting The Target Trace; Target Trace Examples; Coins; Pull Tabs (And Large Aluminium Foil) - Minelab MANTICORE Instruction Manual

Target Trace

INTERPRETING THE TARGET TRACE

Most detected targets will show a distinct Target Trace that accompanies a solid, repeatable Target ID number� Just like
the ID number, the Trace fades away over 5 seconds�
Learning to interpret the Target Trace is a worthwhile skill because it shows you additional information about the target
that cannot be conveyed by the Target ID number alone and may not be obvious from listening to the detection audio�
For example, if you detect a Target ID that you aren't interested in, but the ID Map is showing an elongated or irregularly
shaped Trace, then there may be an adjacent object that is affecting the accuracy of the Target ID� You can now choose to
investigate the target further�
Factors that affect the shape and position of the Target Trace include metallic composition, complexity, orientation and
depth as well as swing rate and Frequency setting�
The opacity of the Target Trace is dependant on target strength� Strong signals generate a darker trace (are more opaque)
whereas weaker signals generate a lighter trace (are more transparent)�

TARGET TRACE EXAMPLES

The following examples show some typical targets on the ID Map�

Coins

Most non‑ferrous coins appear on the centreline as a
distinct round dot� Low conductive coins (e�g� hammered
or cut coins) appear to the left, and high conductive coins
(e�g� large silver coins) appear to the right�
Note that some countries have ferrous coins, which will not
appear on the centreline�

Pull tabs (and large aluminium foil)

Aluminium pull tabs are a common trash target that appear
on the centreline as a distinct round dot, similar to coins�
Aluminium pull tabs are conductive and have no ferrous
content, therefore there cannot be dealt with by
adjusting the Ferrous Limits setting� Instead, adjust the
Discrimination Pattern (page 52)
undesirable non‑ferrous target� Each time you dig up a new
type of pull tab, use it to edit your Discrimination Pattern�
Eventually, you will be rejecting most pull tabs� Take care
however, to avoid masking out coins and jewellery that
share the same Target IDs as pull tabs�
CONTENTS
to reject this type of
27
Detection of a low conductive coin�
Detection of an aluminium
pull tab (ID 30)
Detection of a high conductive coin�
The Discrimination Pattern edited to
Reject IDs 28 to 32 so that the pull
tab will not give a detection tone�