Velleman CS150 Manual Del Usuario página 8

coins and small rings, might be overlooked. As you set DISCRIMINATION to higher levels, the detector first does not
detect small pieces of silver paper, then thick foil, and finally metal objects like pull tabs from aluminium cans.
Note: Each time you use the detector in a different area, you must adjust DISCRIMINATION. Each search location
presents new challenges.
f. False Signals
Because your detector is extremely sensitive, trash-induced signals and other sources of interference might cause
signals that seem confusing. The key to handling these types of signals is to dig for only those targets that emit a
strong, repeatable signal. As you sweep the search coil back and forth over the ground, learn to recognise the
difference between signals that occur at random and signals that are stable and repeatable.
To reduce false signals when searching very trashy ground, only scan a small area at a time using slow, short
overlapping sweeps.
g. Detection Hints
No detector is 100 percent accurate. Various conditions influence metal detection. The detector's reaction depends
on a number of things:
• The angle at which the object rests in the ground.
• The depth of the object.
• The amount of iron in the object.
• The size of the object.
h. Pinpointing a Target
Accurately pinpointing a target makes digging it up easier.
Accurate pinpointing takes practice, and we suggest you practice finding and digging up small metal objects on your
own property before you search other locations.
Sometimes, targets are difficult to accurately locate due to the sweep direction. Try changing your sweep direction to
pinpoint a target.
Follow these steps to pinpoint a target.
1. When the detector detects a buried target, continue sweeping the
search coil over the target in a narrowing side-to-side motion.
2. Make a visual note of the exact spot on the ground where the detector
beeps.
3. Stop the search coil directly over this spot on the ground. Then move
the search coil straight forward away from you and straight back toward
you a couple of times.
Make a visual note of the exact spot on the ground where the detector
beeps.
4. Repeat Steps 1-3 at a right-angle to the original search line, making an
"X" pattern. The target will be directly below the "X" at the point of the
loudest response.
Notes:
• If trash in an area is so heavy that you get false signals, slow your sweep and use shorter sweeps.
• Recently buried coins might not respond the same as coins buried for a long period of time because of oxidation.
• Some nails, nuts, bolts, and other iron objects (such as old bottle caps) oxidise and create a "halo" effect. A halo
effect is caused by a mixture of natural elements in the ground and the oxidation created by different metals.
CS150
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VELLEMAN