10. Other Targets that Aren't There:
Good, lock-on,
repeatable signals but nothing there.
a)
Shallow coins (at or near the surface) or coins
on edge will give a double beep, one on either
side of the coin, just like a nail. Like the nail, the
coin on edge will give a single beep directly over
the target if you sweep at right angles to your
original direction.
b)
A coin lying in the ground at an angle (as
shown in the drawing below) may give a single
target response but may pinpoint several inches
away from its true location. Check around the
inside edges of your hole. If you still don't find it,
enlarge the hole by a couple of inches.
c)
A large, deep target, like a buried pipe or
manhole cover at 2 feet, will often give a good
strong coin signal. If you get a depth reading of 4
inches and you've dug down a foot and
widened your hole several times, give it up.
FALSE SIGNALS
Coin lying at
an angle or
on edge.
Long ferrous
object.
Targets that aren't there
WATER PIPE
Large deep
target.
(nail)
?
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