False Signals - Perel Tools CMD01 Notice D'emploi

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
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.
CMD01_v2 PEREL