Dynamic And Static Modes Of Operation - AKA T72 Operating Manual

However, it should be noted that searching in the discrimination setup can miss some of the weaker
signals from good targets. This is due to the effect of the soil on the vector signal of the target and
causes the signal to go beyond the search vector boundary.
The disadvantages of the "all metal "mode can include difficulty working in trashy areas due to the
extreme amount of signals and sounds received. Since the sector boundaries in the "all metal" mode
are fully open, it may be full of signals from so called "hot rocks". The detector will issue high-pitched
signals from these objects. This is useful for finding stones of meteorite origin. Identifying these "hot
rocks" can be done by noting the high ratings from the VDI (+86) and the stretching of the signal. If
these are bothersome you may use the discrimination mode and set your sector boundaries at -86 to
+86 respectively. This will act much the same as "all metal" accept with the elimination of the "hot
rocks". You may also use the algorithm suppression "Disc. of Hot rocks ".
DYNAMIC AND STATIC MODES
Dynamic mode is the main mode of operation of the detector. It is characterized in that the
processor constantly adjusts to relatively slow changes in ground conditions. Therefore, in this mode,
the instrument responds to the desired objects only when moving the coil. If the coil is stationary
over an object, then after a while the sound will disappear. This is the primary mode your detector is
in every time you turn it on.
Static mode is used as an additional and serves mainly to clarify the location of the found object
(Pinpoint). Unlike dynamic mode there is no constant adjusting and therefore, it is not intended for a
lengthy search. To switch the appliance from the basic search mode to static mode (Pinpoint) Click
OK. In the right-hand side of the Screen there will appear the letter "C", and on the left the value of
the gain for the static mode along with the ability to change this parameter by using the buttons +
and -.
The gain of the static mode is selected experimentally depending on the specific conditions. The
choice of this parameter will depend on the relief of the ground, littered area, temperature changes,
etc. We recommend starting values of 6-7. As already mentioned, the active mode (pinpoint) is used
to determine the the exact location of the object. Let us give some practical tips on how to Use this
mode. After locating an object, in the static mode, and deciding it is worth digging it is time to define
its exact location. To do this, move the search coil off of the approximate center of the target either
left or right (line A on the graph below). Then turn on the static mode (Pinpoint). As accurately as
possible, while maintaining the distance between the ground and the coil, scan the object
backwards. Determine on line A the location (coordinate) where the tone of the sound was the
highest.
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