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The
ActiTrac monitor contains a biaxial piezoelectric
accelerometer sensor to record physical motion in
two planes. It has the sensitivity to detect
movements as slight as 0.012g. The acceleration
signal is sampled at a rate of 40 per second and is
digitally integrated to accurately quantify all
activity under the signal curve. This information is
converted to a reference scale of data counts (0 to
250), or, can be shown in precisely calibrated "milli-g"
units of acceleration.
ActiTrac is the only unit on the market that is
calibrated to report absolute measures of
acceleration. Some activity monitors do not employ
our precision high-tech methods of digital sampling,
but use an older technique which involves
collecting data by counting the number of times the
motion signal crosses zero or the time the signal is
above a threshold. Unfortunately, this dated
technology by other manufacturers does not measure
the magnitude or quantity of acceleration, but only
a relative measure of movement activity.
The ActiTrac measures ambient light and also
features an optional event marker button which can
be used to identify special events. Each time the
marker button is pressed, a coded flag value is
saved into memory. When the data is displayed, a
flag indicating the number of button presses per
epoch (1 to 9), is placed into the data window so
these events can be time marked with the activity
data.
The ActiTrac is designed for easy "Plug-N-Go"
operation - no bulky or expensive computer interface
devices are necessary. Unlike other units on the
market which require an interface for downloading,
our unit directly communicates with a PC through IM
Systems' smart cable assembly. This download
technology is highly proprietary and not found in
other products.
To use the ActiTrac software, your PC should contain
the following, minimum system requirements:
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