Velleman CS102 Mode D'emploi page 8

Notes:
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If trash in an area is so heavy that you get false signals, slow your sweep and use shorter sweeps.
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Recently buried coins might not respond the same as coins buried for a long period of time because of
oxidation.
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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. Because of the metal mixtures, target signals might not be in a "fixed" position. This effect makes
these objects very hard to detect accurately.
Detection range
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The detection range will vary depending on the size of the object, the length of time an object has been
buried and the type of ground the object is buried in. The best soil is compact soil, where you can locate
coins at great depth, especially if they have interacted with the salts in the ground, which makes them
appear larger to the detector. The worst conditions for detecting are in loose soil or freshly dug ground or
when the object has only recently been buried. Ninety percent of all objects are found within 6" of the
surface. Adverse soil conditions can reduce the detection range by as much as 50%.
Determining the target size and depth
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An operator who is familiar with his instrument will be able to do an excellent job of determining object
size, shape and depth before he digs. He does this through careful analysis of the audio signals coming
from the detector. You should always listen for the specific characteristics of a signal. Determine over how
large an area the contact generates a signal to try and "outline" the object before you dig. Listen for the
sharpness or dullness of the signal and determine the strength of the signal. A coin generates a sharp
signal, while the signal for a nail is vague.
Batteries
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Always carry a spare set of batteries when going out on a fieldtrip.
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Using headphones will increase batteries life-time.
11. Cleaning and Storage
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The life of your detector is shortened by neglect or careless use. Wipe the housing with a damp cloth and
then wipe it dry carefully if you have used the detector in a hostile environment (salty water, sand, etc.).
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Do not clean the detector with solvents or detergents.
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The search coil is waterproof and can be submerged in either fresh or salt water. However, do not let water
enter the control box. Rinse the search coil with fresh water after using in salt water.
Salt damage
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Salty air can penetrate the control box in case of frequent use in a salty environment. Parts of the
electronic circuitry may corrode. You can protect your metal detector by covering the control box with
polythene. The warranty does not cover damage caused by salty environments.
Storage
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Store the detector in a dry and warm environment under normal humidity conditions.
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Remove the batteries to prevent them from leaking if the metal detector is to be stored for long periods.
12. Troubleshooting
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Before turning the device in for repair, read this section as it might contain the solution for your problem.
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When problems occur, first check the batteries. Replace the batteries when necessary and ensure the
connections are correct and secure.
Oscillating Signal
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This is caused most often by outside sources such as fluorescent lights, radios, power lines and the
proximity of other metal detectors. There is not much you can do about it.
V. 03 – 09/08/2021
CS102
8 ©Velleman nv