proFEX MG-200 Manual page 9

Filtering can also be performed by the amplitude of the anomalies by choosing the threshold for sound
signal activation. More on this in the part "Sound regulation".
"Sensitivity". With the help of buttons 4 "OK", 2 ←, and 5 →, set the desired sensitivity. Its level will be
shown on display during "OPERATION" mode as "Sens 1" or "Sens 0.1". Sensitivity 1 is recommended
during most types of searches, since sensitivity 0.1 has inertia of about 1 second. It means that the
measurements are still taken 10 times per second but are delayed in the direction of movement by 1
second.
By exiting through "OK" the setting is saved for the following sessions. By exiting through "MENU" only
during current session.
"Balancing" – tuning of identical sensitivity of sensors. Balancing is performed if the reaction of
magnetometer to 5-10 degree tilt from the vertical position during movement is more than 5-10 units
and if it interferes with the search. This operation is described in detail in Part "Tuning of Gradiometer"
"Alignment" of the sensors. If after you change the direction of movement a constant level of field is
displayed, you can reset it by pressing button 7 (reset measurements to "0"). However if the field
reading changes by more than 5-10 units when making a 5-10 degree turn, and it interferes with the
search, alignment of sensors should be performed. This operation is described in detail in Part "Tuning
of Gradiometer"
"Save parameters" – is used to save new settings of "Balancing" and "Alignment" for the following
sessions of operation by pressing button 4 "OK".
"Backlight" – after pressing "OK" use buttons 2 and 5 to adjust the necessary level of backlight.
"Contrast" – after pressing "OK" use buttons 2 and 5 to adjust the necessary level of display contrast.
"Sound regulation" – after pressing "OK" use buttons 2 and 5 to choose whether to adjust the volume
of the sound or the threshold for sound activation. Press "OK", then use the same buttons – 2 and 5 to
set the necessary sound volume or threshold level.
Threshold of sound activation is the value of the gradient, measured in units, beginning with which
sound will be played. The threshold is determined by the user and depends on the minimal expected
amplitude of the needed anomaly.
"Default settings" – by pressing "OK" button twice you revert the device to manufacturer's default
settings, including "Balancing" and "Alignment" settings. Below are manufacturer's default settings:
Correction of "0" – 3;
Filtering – 0;
Sensitivity – 1 unit;