motoscope pro - Tank sensor

If a float resistor is installed, the sensor can be connected directly to the FUEL input of the Breakout Box A or B. Only a float resistor can display the tank content in percent. It should be ensured that the sensor carries a GND/ground signal. No 12V must be applied to the input FUEL!

Teach the tank sensor:
Float resistor
To ensure proper functionality, the tank sensor must be taught-in.
- Empty tank
- select the function "empty" in the settings of the motoscope pro TEACH Fuel (red arrow down)
- Fill up the tank
- navigate to TEACH Fuel in the settings and this time select "full" (red arrow pointing upwards)
Teach-in is confirmed with the word "done".

To enter the settings of the motoscope pro
- select SPEED on the lower large screen
- Hold the Menu key for approx. 5 seconds.
- Navigate to the CONFIG tab
- Press menu key for approx. 2 seconds
- Navigate to the TEACH Fuel tab

Problems:

Inaccurate fuel gauge with float resistance
- Teach-in tank sensor again
- Check float resistance (measure resistance value when tank is empty and when tank is full)
If the resistance value does not change, the tank sensor is defective and must be replaced.

Fuel gauge with float switch does not work
- Check wiring, the sensor should be connected directly to the FUEL input of the Breakout Box
- In the settings the value for LOW FUEL must be set to 50%.
- In both screens the FUEL option must be set to OFF
- The motoscope pro should now display a warning message when the fuel level is low

Fuel gauge with hot wire resistor (NTC) does not work
If a hot wire resistor is installed, an additional relay with a coil resistance of 70 to 150 Ohm is required (for connection see operating instructions).
- set the value LOW FUEL to 50% in the settings
- in both screens the FUEL option must be set to OFF
The motoscope pro should now display a warning message when the fuel level is low.

Fuel gauge does not react at all
If the fuel gauge still does not work, the FUEL input can be tested with a resistor and a cable for a defect.
- connect the input FUEL with ground/GND with a cable.
- Select and confirm "empty" in the Setup TEACH FUEL. (red arrow down).
- Now disconnect the cable and place the resistor instead of the cable between input FUEL and GND/GND.
If necessary try different resistors around 500 Ohm.
- Select and confirm "full" in the TEACH FUEL setup. (red arrow pointing upwards).
There should be a different value for both.
If the values "empty" and "full" are equal, the input is defective and the Breakout Box must be replaced.

The user manual of the motoscope pro can be found on the respective product page under the tab Download.