It is difficult to tell what the problem might be because your simulated signal does not resemble the signal you describe from your hardware. Please capture some real data from your hardware and post that. Usually the easiest way is to show the data then Make Current Value Default then save, but that will not work with the chart. In your VI the easiest way might be to place a History Data property node for the Data chart after the loop. Create an indicator for the data. It will be an array of clusters of an array of clusters representing the waveforms. (Wonderful (not!) dynamic data). Run the VI a few seconds. Stop it. Then Make Current Values Default and Save. Post that VI.
Lynn