Velleman CS990XD User Manual

CS990XD

PROFESSIONAL METAL DETECTOR

DÉTECTEUR DE MÉTAUX PROFESSIONNEL

USER MANUAL

NOTICE D’EMPLOI

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CS990XD – PROFESSIONAL METAL DETECTOR

1. Introduction

To all residents of the European Union
Important environmental information about this product

This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm the
environment. Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a
specialized company for recycling. This device should be returned to your distributor or to a local recycling service.
Respect the local environmental rules.

If in doubt, contact your local waste disposal authorities.

Thank you for choosing Velleman! Please read the manual thoroughly before bringing this device into service. If the device was
damaged in transit, do not install or use it and contact your dealer.

C.SCOPE® detectors are recognised as the finest detectors available. They are designed with lasting quality, high

technology, and above all, value for money. The only way to realise this value is to carefully study and understand the
instruction manual. You will then be able to obtain all the advantages designed into your detector. It is also strongly
recommended that you experiment with the detector’s operation in air using various test samples, in order to learn to identify
and understand the detector’s capabilities and responses. Always remember that becoming a good metal detectorist is like
becoming a good photographer of fisherman, that is, although it is an advantage to buy the best equipment, having bought it,
patience and hours of practice are needed to become proficient.

2. Description

A. battery compartment
B. upper stem and handle grips
C. control box
D. stem connecting nut
E. cable
F. lower stem
G. search head and fastener

3. Assembly

Insert the lower stem into the upper stem. Tuck the cable into the cable slots in the lower stem to prevent it trailing over the
search head. Rotate the lower stem to wrap the cable around the stems and take up any slack and twist the stem lock to hold
the lower stem in position.

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4. Batteries

The CS990XD is powered by eight AA batteries (not supplied). It is
advisable to use standard alkaline batteries to start with. You can then
evaluate the sort of use you give the detector and decide whether the
investment in rechargeable batteries is justified.

The batteries should be fitted in the holder which is located in the
battery compartment. To fit new batteries first check if the power switch
on the unit is switched off. Then loosen the two captive screws located
in the battery cover (do not fully remove these from the cover) and
remove the cover. Inside is the battery holder. Lift out the battery holder
and detach the plug on the connector. Load the holder with eight
batteries ensuring that each battery is inserted the correct way round
(direction of the batteries alternating as shown on the holder). Roll each
individual battery to ensure it is located correctly and making proper
contact. Replace the connector making sure that it is well-seated, and
put the loaded holder in the housing. Fit the cover and tighten the two
captive screws finger tight.

Note: Zinc-carbon batteries should not be left in the detector for long periods
where they could leak. Remember to remove them at the end of the day’s
searching.

5. How It Works

Inside the CS990XD are two separate detectors operating simultaneously. An “inland” detector which is factory set to ignore
mineralised inland ground and gives a positive response to all metals, and a “beach/disc” detector operating at the
(adjustable) wet salt sand exclude level, which gives a negative response to iron. By using the switches on the front of the
CS990XD to combine the signals from the above two detectors, it is possible for the operator to detect all targets whilst
eliminating the effects of the ground, and at the same time distinguishing between the good and the reject targets.

Detection is indicated by the loudspeaker sounding off (the loudspeaker is located in the rear of the battery compartment),
and by the moving meter needle (in the facia panel).

6. The Controls and What They Do

K. signal meter N. ground exclusion switch
L. on/off switch and tune control O. retune push button
M.level control and battery check P. disc mode switch

H. charger socket

I. headphones socket
J. battery compartment

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• On/Off Switch and Tune Control

This control is a combined on/off switch and rotary tune control. Fully anticlockwise to the clicked position is power off.

To turn the detector on, rotate the control clockwise from its indented off position. To tune the detector, adjust the control to
give the preferred level of audio (from the internal loudspeaker or headphones). For best performance, the audio should be
adjusted to threshold, when the sound is just beginning to break through, since this is when the ear is most sensitive to small
changes, and it is important to maintain this threshold when searching to achieve the maximum depth.

The meter gives a visual indication of the audio level (unless battery check or meter disc is selected) and will read midscale
when tuned at threshold.

The tune control is used in conjunction with the retune button which should be depressed when making adjustments to the
controls.

• Retune Push Button

Should the audio level change during searching other than resulting from a target, such as from drift occurring from warming
up, press (and release) the retune button to recover the threshold sound as set on the tune control. The retune button should
also be held down when making adjustments to any of the detector’s controls.

• Ground Exclusion Switch and Disc Mode Switch

Firstly, what is ground exclusion?
On some sites mineralisation caused by iron oxides makes it difficult to operate a detector successfully. The effect of these
minerals is termed ground effect. In practice, if the detector is not correctly adjusted, the signal alters if the search head is not
swept at a constant height above the ground. However, by operating the detector at the correct exclude point this ground
signal can be eliminated. The elimination of this signal is known as ground effect exclusion or simply ground exclusion. When
operated at the inland ground exclude point, all metals give a positive response so this is sometimes called all-metal mode.

What is discrimination (disc)?
Like mineralised ground, metals and wet salt sand too, have a characteristic exclude point. By operating the detector at the
beach exclude point, iron and small ferrous items produce a negative response, but valuable targets still produce a positive
signal. By operating at a higher exclude point, still small pieces of silver (aluminium) paper will also produce a negative
(reject) signal.

• Level Control

The discrimination level of the beach/disc detector in the CS990XD is centred at about that of wet salt sand but can be varied
from iron reject through aluminium foil reject by adjusting the level control. (The level control also adjusts the exclude point of
the meter disc and meter + audio disc.)

• Inland and Disc Mode Switch

With inland selected the CS990XD operates at a fixed level of ground discrimination. This inland ground exclude point is
factory set on the CS990XD. All metal targets will produce an increase in audio volume in this mode regardless of the level
control setting. The beach/disc detector remains operating and can be selected to drive the meter or control the audio pitch
by selection on the disc mode switch. The level of discrimination of the beach/disc detector can be adjusted by the level
control.

The inland mode is used on mineralised inland sites and can be used in conjunction with any one of the disc modes
described below.

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 the meter + audio disc mode the meter moves to the right for good targets and to the left for reject targets and
the audio pitch increases for good targets and decreases for reject targets.