60
Be sure the battery's positive and negative poles are correctly
oriented in the holder. Also, check if the battery has enough
capacity.
3. When using the device in shallow water areas,
the screen does not display things normally and
depths are not indicated with consistency.
The FC500 / 520 has a depth capability from 0.3(0.6) to 30m,
however due to the sonar character, the RTS sensor only can
acheive the best performance in water from 1.2~30m deep.
So, to get the best performance, we suggest you using it in
deeper water.
4. The picture displayed on the screen vibrates
The picture vibrates because the sea bottom depth being
scanned is changing. Since the depth range used by the
current test signal and by the previous test signal differs, plus
the varying height of water bottom, pictures displayed on the
screen will occupy different heights, causing the vibrating
phenomenon.
5. Nothing appears on the display even you can
see fish under the sensor.
a) Oil, dirt and fuel might cause a film to form on the sensor
and reduce its effectiveness. Cleaning the surface of the
transducer might help.
