1
1
1
1
1
1
4
4
4-TONE AUDIO SYSTEM
While the LCD (Liquid Crystal Display) is very accurate in identifying
buried objects, the user in the field does not always maintain the
display screen in his field of vision. Therefore, we have incorporated an
audio feedback mechanism to alert the user to the nature of buried
objects. This audio feedback system first alerts the user to the presence
and classification of objects, whose nature and location can be
confirmed using the LCD display.
The 4-tone audio target identification system functions only in the motion
modes of operation. The detector must be in the DISCRIMINATION
mode, as indicated on the display. In PINPOINT or AUTOTUNE modes, the
detector will emit only a monotone sound.
The detector can sound four different tones, depending on the object
detected.
L
L
O
O
W
W
T
T
O
O
N
N
E
E
Ferrous objects, such as iron and steel, will induce a low tone.
The smallest gold objects can also induce a low tone.
L
L
O
O
W
W
-
-
M
M
I
I
D
D
Pull-Tabs, nickels & smaller gold
M
M
E
E
D
D
I
I
U
U
M
M
T
T
O
O
N
N
E
E
Newer pennies (post-1982), larger gold objects, zinc, and small
brass objects, will induce medium tones. Many recent vintage
non-U.S. currencies will induce medium tones.
H
H
I
I
G
G
H
H
T
T
O
O
N
N
E
E
Silver and copper coins, larger brass objects and older pennies
(pre-1982), will induce high tones. Quarters, dimes and other
precious coins fall into this category.
Audio Target Identification (ATI) classifies metals into four categories.
L
L
O
O
W
W
T
T
O
O
N
N
E
E
Nails, Iron Objects,
& Smallest Gold Objects
L
L
O
O
W
W
-
-
M
M
I
I
D
D
T
T
O
O
N
N
E
E
Pull Tabs, Nickels,
& Smaller Gold
M
M
E
E
D
D
I
I
U
U
M
M
T
T
O
O
N
N
E
E
Zinc Pennies (Post 1982),
Larger Gold Objects
H
H
I
I
G
G
H
H
T
T
O
O
N
N
E
E
Copper, Silver & Brass
Copper Pennies (Pre 1982)
CONTROL PANEL
(continued)
As you sweep the searchcoil over a metal object, a
numeric target
identification
will appear in the center of the display. At the same time,
the
bar graph
on the left of the display will indicate the target depth, in
inches. See the scale printed on label to left of the bar graph. This
scale is calibrated to coin-sized objects. If the target is larger than a
coin, it can be used to approximate relative target depth.
NOTCH
This control allows you to selectively include or exclude target
categories from detection. The NOTCH control can be invoked from
any search mode. After selecting the categories to notch-in or notch-
out, the detector will always return to the
motion discrimination mode.
Notching functions in two ways, manual or automatic.
MANUAL NOTCH
If no target arrows are visible, pressing the NOTCH pad will display
an “R” under all target categories currently eliminated and the “
▲
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