6
19
SEARCH TECHNIQUES
(in DISC Mode)
Target Verification
After detecting a target, do the
following:
1.
Walk around the target in a circle.
2.
While circling the target, continue
sweeping the searchcoil across
the target.
3.
Sweep once every 30° or 40° of
the circle.
If the tone does not change
and the Target-ID value is
consistent as you circle the target,
you can be highly confident of
the target’s identification.
If the tone or Target-ID
changes as you circle the target,
you may have multiple targets or
an irregularly shaped object.
If the tone completely
disappears at different angles, the
target may be trash or a low-value
metal.
If you are new to the hobby,
dig all targets. With practice in the
field, you will soon identify audible and visual target feedback with
certain types of metal objects.
Pinpointing process in motion modes:
1.
Sweep over target in narrowing side-to-side pattern
2.
Take visual note of spot on ground where “beep” occurs.
3.
Step 90° to the side of the target
4.
Sweep coil over same area, at 90° to 1st sweep pattern.
5.
This pinpoints the target location with an “X”
COIL MOVEMENT
When swing ing the coil, be
care ful to keep it level with the
ground about 1/2 inch from the
sur face. Nev er swing the coil like
a pen du lum.
WRONG
CORRECT
QUICK-START DEMONSTRATION
I. Supplies Needed
• A Nail • A Quarter
•
A Pull-Tab from a beverage can • A Zinc Penny (dated after 1982)
• A Nickel
II. Position the Detector
a. Place the detector on a
table, with the searchcoil
hanging over the edge. (or
better, have a friend hold
the detector, with the coil
off the ground).
b. Keep the searchcoil away
from walls, floors, and
metal objects.
c. Remove watches, rings
and other jewelry or metal objects from hands and wrists.
d. Turn off appliances or lights that cause electromagnetic interference.
e. Pivot the searchcoil back toward the detector body.
III. Power Up
Press the ON/OFF touch pad.
NOTE:
Immediately after
powering on, your detector's
unique 10-digit serial number is
displayed once on the LCD. Two
digits are displayed at a time; five
2-digit numbers are displayed in
sequence. This 10-digit serial
number is the same serial number
imprinted on the label inside the
battery compartment.
IV. Wave each Object over the
Searchcoil
a.Notice a different tone for
each object.
Low Tone:
Nail
Low Mid Tone:
Pull-Tab
Medium Tone:
Zinc Penny
High Tone:
Quarter
b.Motion is required. Objects
must be in motion over the
searchcoil to be detected.
V. Press the DISC touch pad
The detector will beep and 2
“R”’s will appear under the
iron indicators.
F4manual-SPREADS(24pg).qx_MF4B-F4manual 4/2/15 12:29 PM Page 6
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