Manual

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As you rotate the DISCRIM knob:
• The SETTING value will indicate the target-ID number to be
“discriminated out,” or eliminated from detection. All targets with
an ID less than or equal to the SETTING value will not be detected.
• A “
--
” will appear over icons for those categories being
discriminated out.
Note that the “
--
” will appear when all numbers within that category
are discriminated out.
For example, if the DISCRIM knob is set at a SETTING of 55, a “
--
” will
appear over “TAB.” Those objects in the tab category with values from
36 to 55 will not be detected. Objects with values of 56 and up will be
detected.
The audio and visual target discrimination systems are independent of
one another. In some situations, targets eliminated from visual
detection will still produce an audible response. Also, the audible
target identification may differ from the visual. The audio discrimiation
system provides more information about the target than the visual
system. Understanding the nuance of the detector’s audio feedback
requires some experience.
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The setting for each control is displayed as a
2-digit number on the bottom left of the screen.
Each time you turn a control knob, or press FREQ
or TONES, the setting for that control is
immediately displayed above the word “SETTING.”
This 2-digit display value will revert back to the
Ground Balance setting after a control is not
adjusted for a few seconds.
When the SETTING value represents the Ground Balance setting,
“GND BAL” will be displayed next to the number.
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The position of the GAIN, THRESHOLD, and DISCRIM control knobs always
indicates the setting of these controls.
The GND BAL setting, as well as the FREQ, TONES, and NOTCH values, are
not permanently saved to memory and will reset to default values when
the detector is powered off.
CONTROL PANEL
STATUS
GROUND BALANCING
–
Technical Information (continued)
PPHHAASSEE
The phase readout at the bottom-
right of the screen provides a two-
digit 0 - 99 numeric indication of
the magnetic “loss angle” of the
soil minerals. The numerical
scale is the same one used for
ground balancing. When the
phase readout (verified by
pumping the coil over the
ground) is indicating numbers
which are consistently above
or below your present
ground balance setting
(indicated on the lower left
of the display), you will
probably want to readjust
your ground balance. This
is especially important if
you’re operating in All
Metals mode.
The Phase readout requires
that the search coil be in
motion. The most repeatable measurements can be achieved by
“pumping” the search coil up and down over the soil surface. The
presence of metal or “hot rocks” will result in inaccurate readings. If
motion of the search coil stops, the phase readout will produce
meaningless readings.
The numeric scale does not indicate actual degrees, but rather the
scaling of the signals used to balance the ground signal. These signals
are scaled to give the greatest phase resolution in nonconductive soils
high in magnetite, where the greatest resolution is needed.
75
85
99
GND DATA
F5-manual-SPREADS(24pg).qx 10/2/08 3:11 PM Page 11