Magnetic Calibration Manual
Xsens MTi User Manual Repository
Magnetic Calibration Manual
Copyright © 2021 Xsens Page 28
features are not available for MTw devices.
features are not available for MTw devices.
Representative Motion (RepMo)
Similar to the Magnetic Field Mapper, Representative Motion (RepMo) provides a solution to
calibrate the sensor for magnetic distortions caused by objects that move with the MT.
However, in contrast to the Magnetic Field Mapper, RepMo is a calibration tool that can run in
the background of the onboard filters of the MT. A connection to a host computer is
therefore not required.
When using "RepMo" the user should be careful that the calibration motion is performed in a
homogeneous field (ideally, only the object attached to the sensor should distort the
magnetic field). Exploiting the knowledge that the sensor is in a homogeneous environment,
all magnetometer sensor data will be used for the calibration without any disturbance checks,
speeding up the calibration process. Based on the sensor mounting, environment and
application platform, the accuracy might vary. Users are encouraged to try this feature if they
are aware of typical application dynamics and have a good knowledge of the environment of
operation. This might be a valid option for trials that do not encounter any distortions in the
environment such as (but not only) ships and airplanes.
How to enable Representative Motion
RepMo is disabled by default. The user can enable RepMo in various ways:
MT Manager In MT Manager, it is possible to stop and start the RepMo mode
with this button:
After stopping the RepMo trial, if the calibration parameters are
satisfactory, the newly generated ICC results can be stored to MT
memory by clicking the corresponding icon:
Low Level
Communication
Both Starting/Stopping the RepMo mode and storing the ICC
results can be done using IccCommand. Refer to the MT Low
Level Communication Protocol Documentation for more
information.
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