I looked at your code, are you successfully reading data with this application? If so, where is this data going to your chart? All I see is a front panel control going to your chart, so I don't see how you intend to diplay the data your are collecting.
As far as the time inforation, do you want to diplay the time your instrument took this data or the time you're getting it into LabVIEW? Normallly you would be concerned with the timing of your instrument, so you should know what rate your instrument is collecting data, and what time your instrument started collecting data. That is all the information you need. Once you have your array of data in LabVIEW you can use a build waveform function to bring the data you collected and your timing data into your chart. For detailed information about build waveform look at the LabVIEW help. I hope this helps!
Nick R
NI