Fisher Research Labs F4, Руководство по эксплуатации

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SEARCH TECHNIQUES
(in DISC mode)
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After detecting a target, do the
following:
1
1
.
.
Walk around the target in a
circle.
2
2
.
.
While circling the target,
continue sweeping the
searchcoil across the target.
3
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.
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:
:
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1
.
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Sweep over target in narrowing side-to-side pattern
2
2
.
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Take visual note of spot on ground where “beep” occurs.
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Step 90° to the side of the target
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Sweep coil over same area, at 90° to 1st sweep pattern.
5
5
.
.
This pinpoints the target location with an “X”
COIL MOVEMENT
When swinging the coil, be
careful to keep it level with
the ground about 1/2 inch
from the surface. Never swing
the coil like a pendulum.
WRONG
CORRECT
QUICK-START DEMONSTRATION
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• A Nail • A Quarter
•
•
A Pull-Tab from a beverage can • A Zinc Penny (dated after 1982)
• A Nickel
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a. Place the detector on a
table, with the search
coil 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 search coil back
toward the detector body.
I
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.
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Press the ON/OFF touch pad.
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a.Notice a different tone for
each object.
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:
:
Nail
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:
:
Pull-Tab
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:
:
Zinc Penny
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:
:
Quarter
b.Motion is required. Objects
must be in motion over the
search coil to be detected.
V
V
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.
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The detector will beep and
2 “R”’s will appear under
the iron indicators.
F4manual-SPREADS(24pg).qx 4/13/11 8:30 AM Page 6