Racelogic VBOX 3i ADAS Installing page 9

7. Accelerate hard from a standstill to 50 km/h or above. Perform a brake stop with a deceleration force of
at least 0.5 g. You must perform this step twice.
Re-running the calibration
The Kalman Filter is constantly adapting its calibration depending on the information it receives from
the GNSS receiver and the IMU. Therefore, if the vehicle is left stationary for a long time, or if an External
IMU is moved from its mounting position, you should repeat the calibration procedure.
The calibration should also be repeated if there has been a communication break between the VBOX unit and
the External IMU, such as:
• You power cycle either the VBOX unit or the External IMU.
• You change the VBOX IMU settings.
• You use the VBOX Setup Software to read the VBOX unit's settings.
• You use the VBOX Setup Software to read the External IMU settings.
• You perform a GNSS Coldstart.
https://en.racelogic.support//Product_Info/VBOX_Data_Loggers/VBOX_3i_Product_Range/VBOX_3i_ADAS/
User_Guide_VBOX_3i_ADAS/04_Installing_VBOX_3i_ADAS_in_the_Vehicle
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