Velleman CS9000 Mode D'emploi page 2

5. Controls
a. Mode Switch (p.1 #9)
This button switches between these functions:
• OFF (power off): Set the button to this position when you are not using the CS9000.
• METAL: in this mode the ground balance is operating and all metal objects such as gold, silver, coins, or even a
septic tank lid can be detected. The metal mode allows of the greatest ground penetration.
• CAVE: in this mode the ground balance is not operating, and the detector responds to all ground mineralisation
changes. Because voids such as holes or caves have a distinct absence of mineralisation, the CS9000 responds
by an increase in sound. Generally, a sound decrease indicates an increase of mineralisation.
This mode allows detection of caves and other voids where treasures may be hidden. The use of this mode
requires a very carefully planned search pattern, paying particular attention to broad changes in the sound.
• BAT CHK: in this mode you can read the condition of the batteries on the meter (P.1 #2).
b. Signal Balance (p.1 #6)
This control adjusts the signal balance or detection depth of the detector. The best position is in the NORMAL range
for most searching conditions. This will provide more than adequate depth with optimal stability. If ground or
interfering radio/electrical signals cause erratic behaviour (extreme fluctuations of the threshold tone), the signal
balance control should be set towards the MIN setting. If greater depths are required, the signal balance control may
be advanced further clockwise. Caution should be exercised when increasing beyond the NORMAL range. If the
detector operates erratically because of a higher setting, the response of deeper targets may be missed. The
NORMAL range offers the optimum setting for smooth operation allowing deep targets to be heard clearly.
c. Ground Balance (p.1 #7)
This control is only operational when the METAL mode is selected. It is adjusted to cancel out the mineralisation in
the ground and allow for maximum penetration. This allows the detection of objects that would otherwise not be able
to be detected because of the presence of mineral in the soil. To start out, put the ground balance control in the
NORMAL range. For higher mineralisation the control is rotated towards the (+) sign and subsequently towards the (-
) sign for reduced mineralisation. Make sure that the automatic threshold control (P.1 #10) is set to NO-AUTO when
adjusting the ground balance control. The method to use for adjusting this control is covered under the section on
OPERATION.
d. Threshold (p.1 #8)
This control adjusts the audio tone volume of the background noise, commonly called 'threshold'. To adjust this
optimally, the sound should barely be audible. It may be necessary to use a higher setting when using the device in a
noisy environment. Generally, the lower the setting, the deeper the detection.
e. Automatic Threshold (p.1 #10)
This feature is a 'self-adjusting' threshold, often referred to as 'motion mode', that maintains a smooth operating
threshold, or background 'hum', when the detector is operated. This hum may drift up or down because of ground
mineralisation changes that are present from one place to another during searching. Even though large changes in
ground mineralisation will still require adjustment of the ground balance control, the smaller variations can be
overcome with the automatic threshold feature. If the sound is permitted to drift too far from the proper setting, the
depth performance of the instrument will decrease somewhat leaving some targets undetected. To activate the
Automatic Threshold feature, simply move the switch to AUTO. It is necessary to keep the detector in motion while
the automatic threshold is in operation. Standing still over a target will result in the signal slowly fading away.
With the switch set to NO-AUTO, the ground balance is the only control compensating for ground mineralisation.
CS9000 2 VELLEMAN