General Information; General Description Of The Device - AKA T72 Operating Manual

GENERAL INFORMATION

Metal detector T.72 is designed to search for and identify metal objects in the dielectric (dry sand,
wood, etc.) and low conducting media (soil, brick walls, etc.). Some applications of use are Criminal;
Engineering; Housing and community services, construction and fire-fighters to search for
underground utilities, pipelines, cables, manhole wells etc...Archaeology and treasure search. The
device is designed to operate under the following conditions: Ambient temperature from -20 up to
+50°c (-4 to 122 F); Relative humidity up to 98 per cent at temperature of 25°c (77 F); Atmospheric
pressure from 630 to 800 mm Hg.
GENERAL DESCRIPTION
The T.72 is an eddy current selective metal detector that works on the principle of induction balance.
The main distinguishing feature of this model is the use of its original software and hardware. Our
multi-frequency technology (MFT) allows the use of any search coils manufactured by us, regardless
of their operating frequency (Hz). That is, the device itself will make adjustments and calibrate to the
selected coil. The device uses the original technology of signal processing sensor-technology space
and harmonic filtering (SFT), minimizing the hindering effect of ferrous soil (salinity) and, thereby,
increasing the reliability of the identification of deep and small objects.
Basic search mode – Dynamic search mode, i.e. detection of an object occurs with constant motion
of the search coil.
To pinpoint the exact location of the detected object the device has a static mode of operation
(Pinpoint).
The device has 2 methods for identifying the object detected:
-Audio programmable multi-mode,
-Visual (Hodograph, VDI value, rating (level) signal-RS).
The device has two independent search channels: RT and ST.
The RT channel (real time) works in real time, i.e. sound indication is given simultaneously with the
movement of the search coil over the object. Sound indication in this channel is a single-tone signal,
volume and frequency of which can change when an object approaches the search coil. Also using
the duration of the tone we can get an estimate of size of the target detected.
When the received signal from an object exceeds the specified RT threshold, the channel generates
the ST audio or short tone.
Channel ST (short tone) is the audio identification channel for the type of object detected. When the
received signal exceeds the threshold of the RT channel the detector issues a short audio tone (ST),
and the screen displays the hodograph (vector time curve) of the detected object.
The frequency of the short tone indicates the type of object detected (high tones – non ferrous
metal, low tone - ferrous metal). The number of tones can be specified by the user (the default is 4
tones).
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