Comprehensive Operating Manual & Guide to Metal Detecting
Comprehensive Operating Manual & Guide to Metal Detecting
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Motion All Metal Mode
The Motion All Metal mode is more sensitive and offers better feel than the Discrimination
mode, and is used to find all metal objects present in the ground. The searchcoil must be in
motion for objects to be detected. This is a single filter search mode similar to the “fast
autotune”, “SAT”, or “P4” modes found in other detectors you might already be familiar with.
THRESHOLD: Adjustable from -9 to +9. For maximum ability to hear the weakest signals,
adjust this background noise level high enough so that it is barely audible while the detector is
in use in the field. To eliminate the weakest signals, adjust into the negative region, which will
allow the machine to run silently if the Sensitivity is not set too high.
The threshold level changes slightly with each detent step on the SETTINGS knob. Each
number on the numeric readout corresponds to five steps.
AUDIO PITCH This control allows you to change the range of frequencies that you hear.
Values range from -9 to 9; 0 is default. Negative numbers lower the frequency of the tone you
hear; positive numbers raise the frequency. This feature is intended to make the tone more
pleasant to your ear; choose your personal preference. Users who have suffered some
hearing loss, (including the natural loss of ability to detect high and low frequencies with age)
may find this control helpful.
SENSITIVITY This controls the signal gain, and is adjustable from 1 to 99. In the presence
of electrical interference, high ground mineralization, or variable ground mineralization,
operation will usually be too noisy (wobbly and erratic sound) if the sensitivity is set too high.
At settings above 90, the internal circuit noise of the machine will probably be audible.
The sensitivity level setting is largely a matter of personal preference. However, if you cannot
hear at least some noise, the smallest or deepest objects will not be detected.
The sensitivity system has two stages, 1-29 (low gain), and 30-99 (high gain). As you
decrease sensitivity and cross the transition from 30 to 29, you may notice that the
background noise increases. Despite this increase as you decrease sensitivity to the lower
setting, 29, the sensitivity is in fact lower under 30, and the machine is less susceptible to
overload from large targets, ground minerals, and saltwater. You may need to adjust to a
setting of 29 or less to silence electrical interference, or to prevent overload on highly
mineralized ground or in saltwater. You may also notice a shift in the ground balance setting
over difficult ground conditions as you cross this transition.
MANUAL GROUND BALANCE
Manual Ground Balance can only be performed while in an All Metal mode, but the resultant
setting will carry over if you change into Discrimination mode. See the previous section on
Ground Balancing for instructions on how to use this feature.
We suggest that you manually ground balance using only the MOTION All Metal Mode. The
result will be more accurate than when using STAT All Metal Mode.
Search Techniques
Sweeping Searchcoil (this does not
apply to Pinpointing with the trigger
switch) Keep the searchcoil in motion to
detect targets. Sweep the searchcoil
parallel to the ground; do not lift the
searchcoil at the end of the sweep.
When you have located a target and
continue sweeping back and forth for
verification, use broad, deliberate sweeps
across the target for the most accurate
target ID. Do not use short sweeps as
you might with other metal detectors.
Shallow Targets
Shallow targets tend to give multiple
responses, with the last response being
the one that remains illuminated on the
visual display. This last response is
usually sampled at the edge of the searchcoil and will tend to be inaccurate. If you suspect a
shallow target (within 2 to 3 inches of the searchcoil), lift the searchcoil slightly, and slow down
your sweep speed until you notice a single response consistently in the same place.
Large shallow targets can cause signal overload, indicated by the siren sound. In these
instances, raise the searchcoil until the overload warning disappears, and sweep at this
increased height.
Large Targets
If an overload warning is not confined to a small spot, you are probably overloading on a large
object, for example, a large iron pipe, reinforcing steel in concrete, or buried sheet metal. It is
usually not possible to locate objects, such as coins, in close proximity to large masses of metal.
Using the special BOOST and CACHE LOCATING processes:
In situations where vegetation or other obstacles make it impossible to sweep the searchcoil
close to the surface of the ground, use the enhanced sensitivity of either the Boost (bP) or
Cache (CL) Locating process to punch through the extra distance to the target. Under most
such conditions, the Boost process will provide the best balance of depth and response. The
Cache Locating process will punch through even more distance to the target, but response is
noticeably slower.
In the Boost and Cache Locating processes, if you sweep fast with the searchcoil close to the
ground, you will lose some target separation. This loss is most noticeable using the Cache
Locating process. Target separation in these processes is comparable to that of the default
process, provided that you slow down your sweep.
Some users, when fatigued after hours of searching, get sloppy with their sweep technique.
The Boost process is more tolerant of sloppy sweep technique than are the other processes
and may be preferred at these times.
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