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Motus Reference Manual
Page 44 of 146
Version 1.1
29/11/2019
6. Check the status in the Magnetic Calibration window to ensure that the
calibration completed successfully. If not successful click Cancel, wait 2 minutes
and repeat from step 4. Do not press the save button in the lower half of the
dialogue, this will over write the new calibration values. The calibration values
are automatically saved internally.
11.5.1.2 Using the Packet Protocol
1. The unit should be powered on while the vehicle is in a level orientation and
kept stationary.
2. After power on wait 5 minutes for the temperature and filter to stabilise.
3. Ensure that the device has a position fix, either from an external GNSS receiver,
or using the External Position and Velocity packet #44 or the External Position
packet #45, before proceeding.
4. Send the Magnetic Calibration Configuration Packet with the action Start 2D
Magnetic Calibration.
5. Whilst keeping as level as possible, rotate the vehicle in either direction through
one and a quarter full rotations. In a car this can be achieved by driving in one
and a quarter circles.
6. Read the Magnetic Calibration Status Packet to ensure that the calibration
completed successfully. If not successful, send the Magnetic Calibration
Configuration Packet with the action Cancel, wait 2 minutes and repeat from
step 4.
11.5.2 3D Magnetic Calibration
The following procedure should be used to perform a 3D magnetic calibration.
11.5.2.1 Using the Motus Manager Software
1. The unit should be powered on and the vehicle kept stationary.
2. After power on wait 5 minutes for the temperature and filter to stabilise.
3. Open Motus Manager and connect to the device. Ensure that the device has
either a GNSS fix or the position has been manually entered in the Manual
Initialisation window before proceeding.
4. In the Tools menu, open Magnetic Calibration. Click the 3D Calibration button.
See section 12.9.1. The following steps 5, 6 and 7 can be performed in any
order.
5. Slowly rotate the vehicle twice around the X axis (roll).
6. Slowly rotate the vehicle twice around the Y axis (pitch).
7. Slowly rotate the vehicle twice around the Z axis (heading).
8. Check the status in the Magnetic Calibration window to ensure that the
calibration completed successfully. If not successful click Cancel, wait 2 minutes
and repeat from step 4. Do not press the save button in the lower half of the
dialogue, this will over write the new calibration values. The calibration values