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Sensor Calibration
The internal attitude sensor and steering shaft sensor of every Ninebot PTR have been accurately calibrated during manufacture. Under
normal operation these sensors will never need to be recalibrated. However, in some situations (extreme temperature fluctuations or
strong magnetic fields) the sensors may experience "drift." In such cases, the internal sensors should be recalibrated.
Calibrate the Steering Sensor
Follow this procedure if you notice the PTR turns slowly, even when the operation bar is vertical (and not moving), or the PTR does not
turn smoothly.
1. Lean the PTR against a wall or use the parking stand. Make sure the operation bar is vertical. Keep the PTR absolutely still
throughout the calibration process.
2. Turn the PTR ON and press the lock button.
3. Press the power button four times. You will hear four beeps and see the LED lights in the base light up one by one.
4. If calibration is successful, the four outside LEDs will turn off leaving only the center LED lit.
If calibration fails, you will hear five beeps, and the LEDs will blink five times. Try again, making sure the PTR remains abso-
lutely still during calibration.
Calibrate the Attitude Sensor
Follow this procedure if Ninebot tends to "drift" forward or backward while riding.
1. Ensure the PTR mainframe is absolutely horizontal by placing it on blocks. Use a level to verify the PTR mainframe is hori-
zontal. Keep the PTR absolutely still throughout the calibration process.
2. Turn the PTR ON and press the lock button.
3. Press and hold the speed limit button until you hear two beeps. This signifies that calibration has begun.
4. When calibration is complete, you will hear another two beeps.
NOTICE
You can also use the Ninedroid App to calibrate the attitude sensor.
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