60
3
)
Electronic compass accuracy is usually ±15 degrees.
4) The update speed of the electronic compass is 2hz (2 times/s),
so there will be a lag when the boat is rotating rapidly.
5) If the problem still exists after confirming the above operations,
please run the “compass test” menu, take a short video and
send it to our service staff.
1) Make sure that the sonar probe is installed away from the
source of the bubble, such as a propeller.
2) The sonar probe should have a certain draught to avoid
air bubbles in the water meter. The draught should be as
deep as possible. It is recommended to be more than 10cm.
Bubbles are the biggest source of interference for all sonar
equipment.
3) Please restore the product to factory settings.
4) If the device (SonarBox) use the same power with boat,
the motor noise will affect the sonar operation.
5) Please use a separate power for the device, or use a Toslon
isolation filter to elimite noise interference from motor.
1
)
All sonars have dead zones. Even for sonars like
TF740/750, the water surface dead zone is 0.5m, and the
underwater dead zone is 0.3m. The unique algorithm of
TF740/750 reduced the underwater dead zone.
2) In
[Sensitivity]
menu, please set the leval of fish detection
sensitivity to 2 (the Max level).
For TF7xx series products, the theoretical measurement depth
is 45 meters. However, during the using, waters below 40
meters is recommended due to the bottom of the mud
attenuating the echo signal.
Why the heading of the
compass is not correct or
boat running at zig-zag at
autopilot mode?
Why the sonar image is
fuzzy between the water
surface and bottom?
Why no fish is detected?
The fish could be found
with my eyes.
Why there is no depth
reading when water depth
at 40 meters around?
failure
corrective action
