CS9000
3
VELLEMAN
f. Headphones Socket (p.1 #11)
The speaker is automatically disconnected as soon as the headphones are plugged in. Use of a headphone will
produce maximum detection depth and longest battery life. The headphones have to be equipped with a 6.35mm
(1/4") plug and preferably with a stereo/mono switch.
g. Thumb Set (p.1 #13)
The thumb set control is located at the tip of the handle. Its use will be explained below.
6. Operation
a. Ground Balance Metal Mode
1.
Set the signal balance (p.1 #6), ground balance (#7) and threshold (#8) control knobs to the centre of the normal
range. Set the automatic threshold control (#10) to auto
2.
Turn the mode control (#9) to BAT CHK and check the meter (#2) to determine the condition of the battery pack.
Then turn the mode control to the METAL position. For most locations this setting is suitable. However, if further
adjustment is needed for ground mineralisation, proceed as follows:
b. Ground Balance Procedure
1.
Set the automatic threshold switch (#10) to NO-AUTO. Make sure the detector is well away from all large metal
objects such as cars, pipes etc.
2.
Remove all metal objects from your person such as belt buckles, car keys, watches, knives etc.
3.
Hold the detector at arms length by your side in a comfortable carrying position, resulting in a distance of
approximately 18 inches from the ground. Keeping the instrument level, press the thumb set control (#13) and
release. The threshold tone is heard and the meter will indicate approx. 20. Slowly raise the device approx. 6
inches. If the tone changes little or none, the setting is adequate for searching that area.
Activate the automatic threshold (#10) and begin searching. If the tone should not change significantly during the
search, switch the automatic threshold back off and proceed in the following manner:
4.
If the tone and meter reading went
down
when the instrument was raised, the ground balance control needs to be
moved slightly in the counterclockwise (-) direction.
Lower the detector back to arm's length, press the thumb set
control (#13) to re-tune, release and again slowly raise the detector by 6 inches. If the tone continues to go down,
repeat the procedure until the tone and the meter reading remain more or less the same in both positions. If the
tone and meter reading go
up
when the
CS9000
is raised, the ground balance (#7) is too far toward the (-) and
must be turned clockwise.
The ground balance procedure becomes more critical as the signal balance is increased. The signal balance control
(#6) does not need to be advanced past the NORMAL range for most applications. If the ground balance procedure
cannot be accomplished as outlined above, try a different location as you may stand above a buried metal object.
c. Locating Buried Metal Objects
The most efficient way to search an area is to use a grid-like pattern over the selected area. To minimise the chance
of missing objects the maximum distance between grid lines should be no more than 6 feet. Making several passes
in one direction then covering the same space at a right angle to your original direction is the best system not to miss
a buried object.
It is normal for a fluctuating background noise to be heard with the signal from a target coming through much more
loudly. Sometimes deeper targets will appear toward the rear of the device. However the difference will usually be no
more than 3 or 4 inches from the front loop, even for the deepest target.
The volume will increase and the meter will read higher as the
CS9000
is passed over a buried metal object.
Remember to keep the detector in motion when trying to locate the centre of a target.
