• Filtered - the result of applying the bandpass filter on the stacked signal. This
waveform is only available when the filter is enabled (via the Filter data point).
For diagnostic purposes, the transducer waveform signals can be stored to a file using the
Diagnostic Collection - Stream to file checkbox. This utilizes the Daniel 3410 Series Gas
Ultrasonic Flow Meter's patented "snapshot-and-playback" feature to accurately record the
flow signals that can then be later reproduced for detailed analysis.
Waveforms are displayed in the time domain (e.g., the waveform signal is plotted against
time).
Waveform viewer - time domainFigure 7-4:
The waveforms may also be displayed in the frequency domain. In this mode a Fast Fourier
Transform is taken of the waveform so that the frequency content of the waveform can be
displayed. This can be useful in noisy environments to see the frequency of the noise and if
it is in the range of the transducer signal.
Commands
Operations manual 113
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