Analyzing large TDMS files

[davewilson]

I am developing an application that will measure an AC voltage at 100KHz for 4 hours. I need to calculate the voltage and frequency drift during 30 second intervals. My plan is to parse the data into small chunks (typically 1 second), calculate the RMS voltage and frequency, and determine the magnitude of drift that may be occurring. I have been able to collect data during short time intervals and analyzed it with the Tone Measurement VI and  RMS VI, but am not sure how to break up large data files into smaller chunks for analysis and store the results.

[crossrulz]

When you read a TDMS file, you can specify how many samples to read and where to start reading from.  All you need to do is read the data in chunks and process each chunk individually.