Fisher Labs Gold Bug DP, Руководство пользователя

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32
SEARCH TECHNIQUES
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 be able to correlate audible and visual target
feedback with certain types of metal objects.
Pinpointing in Discrimination mode:
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 searchcoil over same area, at 90° to 1st sweep pattern.
5. This pinpoints the target location with an “X.”
SEARCHCOIL MOVEMENT
When swinging the searchcoil,
be careful to keep it level with
the ground about 1/2 inch from
the surface. Never swing the
searchcoil like a pendulum.
WRONG
CORRECT
QUICK-START DEM ONSTRATION
I. Supplies Needed
• a Nail • a Zinc Penny (dated after 1982)
• a Nickel • a Quarter
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 searchcoil off
the ground.
b. Keep the searchcoil away from
walls, floors and metal objects.
c. Remove watches, rings and
jewelry.
d. Turn off lights or appliances,
whose electromagnetic emissions may cause interference.
e. Pivot the searchcoil back.
III. Click on detector with the left knob. Set the Gain at the
12:00 position for this demonstration.
IV. Click the right knob to the left to the DISC setting.
V. a. Wave the nail over the searchcoil.
b. Press
+
repeatedly, while continuing to wave the nail.
• Notice the change in sound.
• Sound changes from a HIGH tone to V.C.O. tones (see
page 25).
VI. Wave each object over the searchcoil.
Sweep coin flat and parallel to the searchcoil. This is how
you will usually find them buried.
a. Notice the tones and 2-digit target IDs for each object.
b. Motion is required.
Objects must be in motion over the searchcoil to be
detected in this mode.
VII. Press the
+
button several more times until the Disc value on the
display
=
60.
VIII. Wave the nail over the searchcoil.
a. The nail will not be detected
b. The nail has been “discriminated out.”
Quick-Start Demo continued on next page