32
The functions of the VDO Depth Sounder
Three bars are first displayed when the power supply is switched on, the
pointer is at zero. Two whistling sounds are emitted.
After about 5 seconds the depth below keel is indicated as an analog va-
lue and displayed as a digital value (3.5 m in this example).
The analog indication shows the previous value if no ground echo can
be obtained (see page 36). The display shows three bars, two whistling
sounds are emitted.
The display starts flashing. The pointer returns to zero and two whistling
sounds are emitted if no ground echo is obtained during the next 15 se-
conds.
The display continues flashing until a ground echo is received again.
The display shows three question marks if the cable connection is not
satisfactory or the echo sounder is defective. A continuous whistling sound
is emitted. The pointer returns to zero.
The acoustical alarm can be muted by activating the pushbutton. Check
the connection of the indicating instrument to the echo sounder first.
Defective contacts may have caused the alarm. If the alarm continues,
although the connection is perfect, please contact your VDO agency.
FUNCTIONS
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3.5
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echo_e.qxd 16.04.1998 08:17 Seite 8
