Velleman CS102 Mode D'emploi page 6

8. Operation
•
It is strongly advised to test the detector at home before going into the field. Perform tests with different
metals e.g. coins, golden ring, silver spoon...
Perform indoor tests by placing the detector on a wooden or plastic table, search coil [M] facing the
o
ceiling and slowly moving a metal object over the coil. Be sure not to wear jewellery, as these will
influence the reading. Hold the metal object under different angles while moving across the coil and
notice the difference in detection. Note that the volume will increase quickly as the metal object passes
directly in front of the search head, with the loudest sound occurring when the search head is centred
immediately over the metal object. As the object passes beyond the search head the sound will quickly
fade.
Note: Never test the detector on a floor inside a building. Most buildings have metal of some kind in the
floor, which might interfere with the objects you are testing or mask the signal completely.
The search coil will not detect without motion. You must move the object since you are not
sweeping with the detector at this time.
If the detector does not detect the material, check the battery power and verify that the search coil
is properly connected.
Also perform outdoor tests to learn the influence of the soil type on the detector and to practise ground
o
balancing. Place a metal object on the ground and slowly sweep the search coil [M] over it. Be careful
when using valuable metals for outdoor testing – make sure you can always retrieve them.
Note: 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.
•
Switch on the detector by turning the discrimination threshold control [7] clockwise. To switch it off, turn
the control counter clockwise until a click is heard.
•
When desired, plug a headphone (not included) with a 3.5mm plug into the headphone jack [5]. Consider
using a headphone with sound control, as the detector can only switch output sound level between normal
or low mode.
•
Set the speaker (or headphone) sound level to normal or low using the volume button [3].
•
When the low battery indication [8] lights up, replace the batteries to ensure detecting accuracy.
ALL METAL -mode
•
To find any kind of metal, turn the discrimination control knob [1] counter clockwise until a click is heard.
Set the sensitivity control [6] to average. Setting the sensitivity control [6] to high in all-metal mode will
produce a complex return signal.
•
Hold the search coil [M] ±1m above the ground, press and hold the trace button [4] and turn the ground
balance control [2] to area 'P'. Release the trace button [4].
Hold the search coil [M] ½"~2" from the ground. If the meter [10] points to the right (speaker sound
•
high), turn the ground balance control [2] counter clockwise; if the meter [10] points towards the left
(speaker sound low), rotate the ground balance control [2] clockwise.
Note: After each ground balance control [2] adjustment, press the trace button [4] to initialize the new
setting. Press the trace button [4] whenever the detector is drifting away from the sensitivity setting,
e.g. when moving from dry ground to wet ground.
•
When searching in highly mineralized areas, set the sensitivity control [6] and threshold control [7] to low
by turning counter clockwise, and keep the searching coil [M] slightly further away from the ground.
DISC -mode
• When a metal object is detected, set the discrimination mode detector [9] to 'DISC' and slowly turn the
discrimination control [1] clockwise (away from 'all metal'). The further the knob is turned, the more
metals will be rejected. Refer to §6 how it works – phase shift for more information.
•
If the discrimination control [1] is set to zero, all detected metals will produce a long tone. When set
higher, rejected metals will produce a short tone while accepted metals still produce a long tone.
TONE -mode
• Set the discrimination mode detector [9] to 'TONE' to get a tone indication depending on the type of
detected metal. Low resistive metals (e.g. Silver) will produce a high tone, while higher resistive metals
(e.g. Copper) will produce a lower tone.
•
If the discrimination control [1] is set to zero, all detected metals will produce a high tone. When set
higher, rejected metals will produce a low tone while accepted metals still produce a high tone.
V. 03 – 09/08/2021
CS102
6 ©Velleman nv