User's Manual

Document MV0319P.N
© Xsens Technologies B.V.
MVN User Manual
9
therefore decrease performance. For optimal performance the ambient temperature should remain
constant as much as possible during the measurement.
NOTE: Never expose the motion tracker to strong magnetic fields. Xsens MT’s contain the absolute
possible minimum amount of ferromagnetic materials (‘hard’ and ‘soft’ magnetic materials).
Nonetheless, some minor components can be magnetized permanently by exposure to strong magnetic
fields. This will not damage the unit but will render the calibration of the magnetometers useless. This
can typically observed as a (large) deviation in heading. Therefore it is necessary to prevent exposure
of Xsens Motion Trackers to strong magnetic fields, such as close proximity of permanent magnets,
speakers, electro motors, etc.
It is best to ensure that measurements, in particular calibration steps, are conducted in an area free of
magnetic distortions. To ensure a magnetically clean environment, ensure that the colored markers are
green at the pelvis, hands and feet during calibration and preferably also during recordings.
The Awinda Station, Awinda USB Dongle, Awinda Chargers, Access Point, Body Pack, Battery Pack,
and MT’s must be kept dry at all times. Condensation and water may damage the internal electronics.
The MT’s should be protected from electro static discharges or sources of radiation, as exposure to such
sources will damage the internal electronics.
The MT’s should be protected from violent handling such as drops on hard surfaces. Excessive shocks
or violent handling may damage the MT’s. When handling an MT at a desk, it is advised to place
cushioning material on the desk.
With MVN Awinda, if it appears that data performance is less than expected, try changing the radio
channel to ensure a channel is used with minimal radio interference.
3.4.2 Absolute maximum ratings
Stresses above Absolute Maximum Ratings may cause permanent damage to the device.
Description
Value (MVN Link)
Value (MVN Awinda)
Shock (any axis):
100000 m/s
2
(10000 g)
unpowered/powered
100000 m/s
2
(10000 g)
unpowered/powered
Operating/Storage Temperature:
0 C - +50 C
0
o
C - +50
o
C
Stresses beyond those listed here may cause permanent damage to the device. These are stress ratings
only and functional operation of the MT at these or any other conditions beyond those indicated in the
specifications are not implied. Exposure to absolute maximum rating conditions for extended periods
may affect device reliability.
NOTE: Drops onto hard surfaces can cause shocks of greater than 100000 m/s
2
(10000 g) exceeding
the absolute maximum rating of the device. Care should be taken when handling to avoid damage.
Drops causing shock greater than absolute maximum ratings may not destroy the device but will
permanently alter the properties of the physical motion sensors, which may cause the device to become
inaccurate.