Delta 4000 Owner's Manual page 17

TARGET IDENTIFICATION
2-Digit Target Identification
The 2-digit value in the middle of the screen provides a specific target value
to help identify buried targets more accurately. With practice in the field, you
will learn to associate target values with specific objects. Coins are more
likely to yield the same value with each pass of the coil due to their concentric
shape. The presence of multiple targets will yield multiple tones. Trash
objects are more likely to yield a different number on each pass. The angle
of the coil relative to an object may also influence target identification. If
waving coins over the searchcoil for practice, wave with the flat side parallel
to the searchcoil; this is the position you will most often find coins buried in
the ground.
2-Digit TARGET IDENTIFICATION Values
Category
Iron
Foil
Nickel
Alum
Zinc
Dime
Quarter
50¢+
Numeric
Value Range
10 - 39
40 - 55
56 - 60
61 - 75
75 - 79
80 - 85
86 - 90
91 - 99
Some
Common
Objects
US Nickel
US Zinc Penny
(after 1982)
US Dime
US Copper Penny
(pre-1982)
US Quarter
US Half-Dollar
US Silver Dollar
continued
Typical Values
for Common
Objects
58
76
82
81 - 82
87
89
94-96
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