6
OM-CP-ULTRASHOCK-A & OM-CP-SHOCK300
Logging Mode - Peak vs. Instantaneous
When
Custom Start
is selected in the Omega 4 Software, the user is presented with a range of logging time
intervals or actual recording rates (sampling rates). For all but the two highest recording rates, the user will
also have a choice of Peak vs. Instantaneous capture.
PEAK
INSTANTANEOUS
Regardless of the logging interval, the accelerometers
will internally sample at 512Hz. At the logging interval
(for example, 30 seconds), the Peak value found in the
previous logging interval is stored.
The red markers show the peak value for the interval
which will be stored.
The accelerometers will only sample data at the logging
rate. For instance, if a 30 second logging rate was
selected, then only a single data point is captured at each
30 second instant.
The potential to lose valuable data can be seen. This, of
course, is very dependent on the applied shock duration
and wave shape. It’s possible for a significant shock
event to occur and not even be visible in the data for the
Instantaneous mode.
1. Connect the logger to the interface cable.
2. Highlight the data logger in the Connected Devices
list.
3. Click
Custom Start
.
4. Choose the
Start method
—Now or Delay (select
date and time).
5. Choose the
Stop method
—Manual or Automatic
(select date and time).
6. Select the
Reading interval
.
7. Select the
Shock recording mode
(if applicable)—
Instantaneous or Peak
NOTE:
When switching USB connections from a PC, laptop or power adapter, users can expect a 2 minute
delay.
