36 Garrett Metal Detectors
AT Pro International™ 37
Tip for narrowing the detection area:
Large targets can
produce wide signals while pinpointing, making it difficult
to precisely locate the target's center. To help pinpoint, the
detector can be retuned to the target to narrow the detection
field as follows.
While holding down the Pinpoint pushbutton, move the
coil toward the target until the LCD just reaches a full-scale
response. Then, quickly release and depress the Pinpoint
button again to retune the detector and narrow its detection
field. Continue moving the searchcoil toward the target to
find its central peak response. If needed, repeat the retune
process to further narrow the target's response.
A quality hand-held pinpointer such as Garrett's
Pro-
Pointer
is a recommended accessory item to speed the target
recovery process and to aid in locating secondary targets.
Coin Depth Indicator
—The depth of a coin, or similar sized
target, is indicated in 5cm increments. Note: targets
larger
than a coin may display shallower than actual depth while
targets
smaller
than a coin may display deeper than actual
depth.
•
Alternative pinpointing technique: DD-tip or tail
. In the
standard pinpointing method described on pages 34, the
target is pinpointed beneath the center of the searchcoil.
Some detectorists using DD coils prefer to pinpoint off the tip
or tail of the searchcoil.
Press and hold the Pinpoint
pushbutton and sweep the
searchcoil side-to-side to center
the target (the point where the
strongest audio response is
heard and the maximum signal
strength is displayed on the LCD).
Then, pull the searchcoil slowly
toward you
(see Image A)
, while
noting the target signal
.
DD "tip" pinpointing technique
PULL COIL TOWARD YOU
5-10cm
5-10cm
Indicates detected target
Indicates target position
Image A
Image B
Once the target signal drops off
(both audibly and on the LCD
meter), shallow targets should
be located immediately in front
of the searchcoil's tip
(see Image
B)
. Deep targets will be under or
just inside your searchcoil's tip.
This is because the conical shape
of the searchcoil's detection field
begins bending in slightly as the
depth increases.
