Velleman CS150 Manual Del Usuario página 7

4. While holding the search coil level and about 1-2 inches above the ground, slowly move the search coil over the
area where you place the sample, sweeping the search coil in a side-to-side motion.
5. Try finding other metal in the area.
When you find a metal item, wait a few seconds after the tone stops before continuing, to allow the detector time
to reset (or, press the red button on the handle to return the pointer to the centre of the vu-meter.
d. Search Coil Sweeping Hints:
• Never sweep the search coil as if it were a pendulum. Raising the search coil while
sweeping or at the end of a sweep causes false readings.
• Sweep slowly - hurrying makes you miss targets.
• If the detector detects the material, it sounds a tone and the pointer moves to the type
of material if found. Set MODE to TR2 to determine the quality of the metal.
• If the detector does not detect the material, make sure you are moving the search coil
correctly.
Notes:
• The detector responds with a strong signal when it detects most valuable metal objects. If a signal does not
repeat after you sweep the search coil over the target a few times, the target is probably junk metal.
• False signals can be caused by trashy ground, electrical interference or large irregular pieces of junk metal. False
signals are usually broken or non-repeatable.
e. Fine-tuning the Detector
When you become familiar with how your detector works, fine-tune it to make it more selective in what it finds.
1) Adjusting SENSITIVITY
To adjust the search coil's ability to detect objects at different depths in
the soil, rotate SENSITIVITY between MIN and MAX. For maximum
detection depth, leave SENSITIVITY set as high as possible. If the
detector makes a "chattering" noise, decrease SENSITIVITY until the
"chatter" stops.
2) Adjusting GROUND
Setting GROUND takes a little time, but is critical for accurate operation.
GROUND tunes out false signals from mineralised soil.
1. Set MODE to VLF and lower the search coil to 1/2 to 2 inches (1 to 4cm) above the ground.
2. If the pointer swings to the right, turn GROUND to the left. If the pointer swings to the left, turn GROUND to the right.
3. Raise the search coil about 1 foot (30cm) from the ground and press the red button on the handle. The pointer
returns to the centre.
4. Repeat Steps 1-3 until the pointer stays close to the centre each time you lower the search coil to the ground.
After you set GROUND, the detector is set for the soil type of that particular site. Do not reset it until you use the
detector at a different site.
3) Adjusting DISCRIMINATION
Discrimination is the detector's ability to differentiate between types of metal. The detector's DISCRIMINATION
setting determines whether the detector will distinguish between different types of ferrous and non-ferrous metals.
If MODE is set to TR2, start with DISCRIMINATION set to mid-range. While you use the detector, adjust
DISCRIMINATION to the best position. As you set DISCRIMINATION higher, the detector becomes more sensitive
to the differences between large aluminium and gold pieces, for example, but some small valuable pieces, such as
CS150
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VELLEMAN