Velleman CS990XD User Manual - page 6
CS990XD
VELLEMAN
6
By selecting none the meter needle moves to the right for all targets and the pitch remains constant.
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Beach and Disc Mode Switch and Level Control
Due to the varying nature of beach soils (the salinity and wetness) the CS990XD is equipped with an adjustable level of
ground exclude in beach mode. It is the mode best suited to beach detecting where fine adjustment of the level control is
required to exclude wet sand.
By selecting the meter disc mode the meter needle moves to the right for good targets and to the left for reject targets.
By selecting none the meter needle moves to the right for good targets and to the left for reject targets (same as meter disc
since it is ion beach mode).
Selecting meter + audio disc gives a pitch increase to good targets, reject targets are ignored.
The inland detector plays no part when beach mode is selected and is switched off.
Only use the beach mode on the beach or at inland sites where there is no mineralisation and where you do not wish the
detector to sound off over iron.
It should be apparent from the above that the level control acts primarily as ground exclude control in beach mode, and
secondly varies the discrimination point when operating in meter disc or meter + audio disc mode.
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Battery Check
A battery condition indicator is provided on the detector. To do this for the first time prior to reading the remainder of the
operating instructions proceed as follows: turn the power on/off, tune control on. Turn the level control fully anticlockwise to
the battery check position. The meter will indicate in the green battery symbol area if the batteries are good. Rechargeable
batteries will not read as high into the green as standard batteries even when fully charged. They also give less indication of
discharge in the meter during use. Remember to switch out the battery check function when you have checked the batteries.
7. General Hints
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Detection Range
Your CS990XD is a top performance detector but adverse soil conditions can significantly reduce the depth of detection.
Detection ranges 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 ground conditions are well compacted soils and coins can be found at the greatest depth if the object has been
buried for some time and the coin has interacted with the salts in the ground, thereby appearing larger to the detector. Worst
conditions for detecting are on loosely compacted or freshly dug ground or when the object has only recently been buried. In
these conditions detection range will be reduced. Ninety percent of all artefacts are found within 15cm of the surface.
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Anomalies
Iron, unlike a coin, occurs in a multitude of shapes and sizes and as result it is possible that large pieces of iron may give a
positive reading. Confusing signals can occur in the first few centimetres below the search head, and are typically
characterised by a double signal from the same object, usually iron, which often ranges from a strong positive to a strong
negative signal. To overcome these problems simply raise the search head, retuning if necessary, and rescan until a clear
signal of rejection or acceptance is obtained.
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Headphones
Use stereo headphones or mono but not stereo switched to mono. Use of headphones is recommended as it eliminates
extraneous noises and will extend battery life. Insertion of headphones automatically mutes the loudspeaker. The 6.35mm
(¼”) headphones socket is located on the front of the battery compartment.