10
ii.
BATTERY CHECK - FREQUENCY
control has two main functions in addition to the battery test which is at the switched, fully
anti-clockwise position. Small changes to the frequency setting can be used to minimise
interference from other signal sources. Changing the frequency also affects the machine’s
sensitivity to aluminium alloy based rubbish such as silver paper and pull tabs. By rotating
the control clockwise, the machine’s sensitivity to such objects will be progressively
increased. When used in the surf or under water it may be necessary to reduce the
frequency setting. Turn the control anti-clockwise to minimise threshold variations caused
by changing depths of sea water. The audio frequency is also varied with this control giving
audible indication of the frequency setting – this is useful when using the machine whilst
under water. If the frequency control is rotated fully anti-clockwise the battery check
position is reached. Whilst in this position the battery indicator will show the condition of
the batteries. If the GREEN indicator fails to come ON then the batteries should be
changed. The CS7 is a low current drain design and typical battery life will be 25 hours of
intermittent use.
iii.
TARGET INDICATOR
This group of four bright RED LEDs will illuminate whenever the audio tone goes above a
preset level – indicating that a target has been located.
iv.
BATTERY CONDITION INDICATOR
Three LEDs indicate the battery voltage –
Ø
GREEN – good batteries
Ø
YELLOW – used batteries, some life left
Ø
RED – exhausted batteries
v.
VOLUME (INTERNAL ADJUSTMENT)
The volume of the detector is factory set for optimum performance without causing
discomfort. However, if the detector is used in very noisy surf environments then it may be
necessary to adjust the volume.
It is important only to proceed with this adjustment
if you have the necessary skills and tools.
Adjustment is done by unscrewing the six
retaining screws and carefully removing the front control cover - taking care not to damage
the ‘O’ ring seal or the sealing surfaces. The front cover together with the main printed
circuit board is then carefully pulled away from the control housing revealing the small audio
printed circuit board at the rear of the control housing. In the centre of this circuit board
there is a small trimmer potentiometer labelled “VOL” which may be adjusted with a small
screw driver. Take care as this item can be damaged - so do not to force the rotation of
this trimmer too far. The detector can tested for volume and then reassembled. Take care
that there is no damage, sand or dirt on the mating surfaces before seating the ‘O’ ring
correctly and reassembling.
Caution: Ensure that the volume does not damage the ears of the user.
