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Depth Indicator
When operating in DISC Mode, a target’s location and size can be verified using the
PINPOINT control.
Press PINPOINT to temporarily detect metal without search coil motion, and a
monotone hum.
While holding the PINPOINT, the DEPTH indicator will appear. The number beneath
DEPTH represents the distance of the objects, in inches, from the search coil. The Depth
scale is calibrated to coin-sized objects. For objects other than a coin, the numeric value
is a relative measure of the target’s depth.
Audio Feedback
When a target is detected, the 850 will respond with two types of sound:
•
V.C.O. (Voltage Controlled Oscillator) is an audio response with variable pitch and
volume.
•
A LOW tone beep.
In DISC Mode, targets which fall into the zone along the arc whose segments are shaded
will be identified with a LOW tone beep and solid segments with V.C.O.
As the user sets the discrimination level with the + and – buttons, he is determining
which targets will include the low tone, and which will be eliminated.
V.C.O. is an audio response which provides a good feel for the target.
The stronger the target signal, the higher the volume and the higher the audio pitch.
Very weak signals will have the faintest volume and lowest pitch.
For this reason, the use of headphones is always recommended for detecting the
smaller and deeper targets.
2-
digit target indicator
In DISC Mode the 2-digit target indicator, in the middle of the screen, provides a specific
target value to help identify buried targets more accurately. With practise on the field,
you will learn to associate target values with the probable identification of buried
objects. The target value can vary each time the search coil passes over the target,
depending upon the orientation of the object and its distance from the search coil.
As a starting point, refer to the table below.
