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FTAnalyzer: selection of measurement domain and acquisition values
Measures can be displayed in the time domain, frequency domain or both with or without starting
the vibrational event synchronized acquisition.
3.5.1 Time: time domain measurement
To carry out measurements in the time domain, select TIME in the View Type combo box.
Measurements will be displayed in the oscilloscope Graphics area.
The diagram will show time on the abscissa axis and the selected event on the ordinate axis. To
select the event to be measured, find the corresponding option in the second box.
The terms used in the “signal type” combo box are explained below:
Axes: to measure and display the acceleration x, y, z components measured by the acquisition
device.
Axes & Modules: to measure and display the acceleration x, y, z components measured by the
acquisition device, as well as the acceleration vector projection modules on xy, xz, yz and xyz
planes.
Rms: to measure and display the acceleration x, y, z components measured by the acquisition
device, but also to calculate and display the Rms value (root mean square) for each acceleration
component.
FTAnalyzer: measurement buffer
The Rms value is reckoned by an algorithm based on a 256-measure buffer. The algorithm starts
calculation from the moment of measurement.
Measurement
device
Acquisition
value
Measurement
domain
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