MW8 & MotionWare User Guide: Issue 1.2.1
Page 22
Battery Life
The MotionWatch uses a standard non-rechargeable
CR2032 coin cell which is easily replaced by the user
(Appendix A5 - Changing the Battery). The MotionWatch
incorporates smart battery monitoring to measure actual
device usage and battery voltage to calculate an expected
life remaining. Typically the expected battery life will be
4
months
(MotionWatch Mode),
3 Months
(Tri-axial Mode)
and the battery life indication will provide a percentage of
life remaining. Hovering over the battery life in either the
current or new setup screens will show the expected
battery life in days in the information pane of the
MotionWatch Manager.
The MotionWatch monitors several parameters to
automatically detect when a new battery is fitted.
The watch will shut down when the battery is depleted
–
light recording will cease before activity recording.
The MotionWatch requires some time to shut down fully
when the battery is removed. Always wait at least 1 minute
before inserting the new battery.
If the battery is replaced but the battery life indicator is not
updated to 100%, click on the
‘new battery’ button under
the Utilities tab to reset it manually.
Compress Data
It is possible to compress the activity data to allow longer
recordings at shorter epochs. The light data is not
compressed. The function uses a logarithmic compression
which provides lower accuracy with higher values
(quantized data). At low levels, the accuracy is not affected
hence for sleep analysis the compression function will
have minimal effect upon data. Note that the validations
were performed without data compression.
Disable Marker Button
Select to disable the marker button.
Recommended Setup for Sleep Recording
The recommended settings for sleep recording are:
MotionWatch Mode 1
30 second epoch
These are the settings with which the validation studies
were performed. It is possible to use other settings if
required including tri-axial mode.
Recommended Setup for Daytime Activity Recording
The recommended settings for daytime activity recording
are:
Tri-Axial Mode 3
Any epoch
Also set the body position during set-up so that this is
noted within the data.
