Table 1: Configuration File Tags and Descriptions
Tag
Valid Settings
Default
Description
deadband
An integer between
0 and 16384
0
Sets the deadband to a range expressed in “counts”.
A new sample is recorded if any sensor axis
exceeds the previous recorded reading by the
deadband value
deadbandtimeout
An integer between
0 and 65535
3
Specifies the period in seconds when a sample is
recorded regardless of the deadband setting. This
feature ensures periodic data is recorded during
very long periods of inactivity.
dwell
An integer between
0 and 65535
1
The number of samples recorded after a deadband
threshold triggered event
microres
-
Off
The presence of this tag sets the device to record
time stamps with 0.1ms effective precision.
rebootondisconnect
-
off on disconnect
The presence of this tag causes the system to start
recording after disconnect from a USB port.
samplesperfile
An integer greater
than 0
90000
The number of lines of data per data file before a
new file is created
samplerate
12, 25, 50, 100,
200, 400
100
Sets the rate at which data is collected and recorded
to the microSD card.
starttime and stoptime
See section 2.6.8
-
Defines when to start and stop recording
stoponvusb
-
Off
Stops data logging if 5v USB power is present (see
section 2.6.9)
statusindicators
“Normal”, “High”,
“Off”
Normal
LED status indicators can be activated with normal
brightness (Normal), activated with high brightness
(High), or completely deactivated (Off).
2.6.1 deadband
“deadband” defines the minimum difference between recorded sensor readings. A new sample from
the accelerometer sensor must exceed the previous recorded reading before the logger records the data.
The deadband setting is expressed in "counts" units and is applied to the output of each axis. The
deadband value can be set to an integer between 0 and 32767. The deadband function is an effective
way to reduce the amount of data collected by defining the granularity of the data.
The deadband functions as a event threshold limit when used in conjunction with the “dwell” feature.
Figure 14 illustrates the deadband feature filtering out small changes in acceleration from the recorded
data. Only when the deadband limit is exceeded will a new data sample be pushed to the file. Note
that this feature will result in samples with inconsistent time periods. Therefore, the data sets should be
re-sampled to establish uniform time periods.
Gulf Coast Data Concepts
Page 12
X16-1D, Rev B
