Display and Controls
POWER
A quick press of the button turns the MX 7 ON. Another quick press of the
power button toggles the backlight on and off. Pressing and holding ON/OFF
for a second turns the detector OFF.
Options: Activates option selections. Up & down arrows select among avail-
able options. Pr or - adjusts that specific option. Select another option
by pressing up or down arrows again again or exit by pressing the Option but-
ton again or waiting for the option to time out automatically (10–15 seconds).
√/X: Access Pinpoint mode. Also used for some menu sequences.
In Search mode, + and - adjust Sensitivity; in Options they select the level of
adjustment.
TRACK
The MX 7 automatically self-adjusts to the ground mineralization currently be-
ing searched and tracks to changes in mineralization. Ground compensation
and tracking to ground mineral changes is fully automatic. Automatic ground
tracking improves performance over typical/normal ground where ground
mineral changes are naturally occurring and gradual.
Spotty high ground minerals (naturally occurring or not), mixed with lower min-
eralization, can cause errors in ground tracking and result in instability and dif-
ficulties (as if the sensitivity was set too high for the area). If stability does not
return at reasonably reduced sensitivity settings, spotty high mineralization is
likely the cause. To search these difficult areas, locking the ground balance at
a fixed level more often than not resolves or reduces instability.
Pressing the TRACK button can lock tracking. However, the level the ground
balance is set to when locked is critical for stable operation. Holding the Track
button puts the detector into manual ground balance mode, where the num-
ber displayed is the relative ground phase, and the depth meter shows ground
strength.
•
Option #1: In 80% of situations, tracking can be locked as soon as the detector
is turned on. This will result in improved performance in difficult spotty areas.
Locking the Tracking prior to searching locks the ground balance at the ferrite
(high iron) level.
•
Option #2: In 20% of situations, a natural or man-made spotty mineralization may
still cause difficulties at the initial ferrite, locked-ground rejection level. In these
areas, find a highly mineralized spot that is representative of all the spots in the
area, sweep the search coil 6–12 times (or until it doesn’t respond) and press
the TRACK button. In this case, the user is locking the ground rejection level at the
high mineral spot so that all similar spots can be ignored (no response).
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