The t0 of your waveform needs to be the present time. The example that you are using does not do anything to the timestamp except to convert it to a date-time string. You can either configure what ever you are getting the data from to return the t0 as the accureate present time, or you can get the waveform component of t0, change it, and then build the waveform back together again. This should get you what you are looking for.
- export waveform data&date burcu
- LabVIEWer