Hi
Good day.
I am a beginner to LabVIEW software and recently working with LabVIEW 2017 for data acquisition. I have to acquire airflow signals continuously as I need to perform multiple recordings in one acquisition. I added a waveform chart into the vi for continuous acquisition and write to measurement file for saving data of multiple recordings.
Query 1: When I added the write to measurement file the total number of samples of the recorded data was correct. I tried saving the data in both excel and TDMS in write to measurement file. However, the timestamps go haywire, but the data obtained seems to be correct as it corresponds to the plots presented in the chart. The sampling rate is 100Hz. Could anyone help me to fix this problem? How to get a proper time stamp?
Query 2: The waveform chart legend provides me with 4 plots, including ‘Plot 0’. I only want Plot 1-3. When I reduce the number of plots in property icon it removes the latest plot (plot 3). How could I remove ‘Plot 0’ from the legend of the chart?
Query 3: Is it possible for me to change the sampling rate in the vi? I tried changing the value 100 to some other digits, but the signals are sample only at 100Hz. How to change the sampling rate?
Attached here are the vi responsible for airflow acquisition and the excel sheets of the recorded data. I really hope that I could get solutions to these problems.
Thanks.
Regards,
Priya