User's Manual
34
ANALYZING FIELD DATA
Although the detector can be used with smaller
search coils the data logger function is mainly de-
veloped for larger metal objects being at least 6cm
x 6cm in size. Therefore, frames of 1m x 1m or even
bigger should be in use to achieve best results.
To analyse the dierent pictures generated with the
software refer to the following instructions. Com-
pared to many other systems the Lorenz DEEPMAX
Z2 will not only generate one or several graphic
representations with dierent sensitivity ranges for
the same metal objects but also gives additional in-
formation on the probable kind and size of a metal
object being located. The advantages of the multi
channel data logger are as follows:
False or overload data will be easily recognized
on one or two of the maps. At the same time you
will nd useful data on at least one or two channels.
When looking at the dierent colour maps select
signals in the GROUND channels and try to compa-
re the same indications with DELAY and Identica-
tion channels.
Some signals appear on one scan and disappe-
ar on others to give the operator more advanced
information on the kind of metal (decay of the eddy
currents) or the surrounding ground conditions.
It is possible to separate two or more dierent
metal objects which give only one large indication
in the Delay channels but two or more coloured
dots on the metal classication or Ground channels.
Some longer ferrous metal objects lying horizon-
tally in the ground will cause a special double signal
when looking at the Ground channels.
Ferrous metal objects will only give weaker sig-
nals in Ground modes and therefore a small indica-
tion in Z direction in the three dimensional surface
maps only.