I have a issue with .tdms log files from a recent vibration measurement.
Needless to say, this is a nightmare, as measurements were concluded for work on board a vessel in Singapore, while I am now back in Norway. We typically analyse our data with a mixture of signal express playback and exporting selected findings to display in excel from SignalExpress.
I wa using NI Signal Express (2015 Version 15.0.0) with Sound and Vibration Assistant during measurements and playback.
During acquisition I was using NI cDAQ 9184 (4-slot network rack), with 1 x NI9239 (4ch, ±10V, 24-Bit, Compact DAQ) module which had only one channel to aquire from an optical tachometer, and 3 x NI9234 (4ch, ±5 V, 51.2 kS/s per Channel, 24-Bit IEPE) modules for 10 different vibration sensors connected.
When running playback og the logs in this .seproj file, or importing the logs created during same measurements in an empty project, only the logged data from the voltage module ("voltage.tdms") and one channel from the "Velocity.tdms" file are loaded properly (the last channel used is ok, others are "empty".
I know that some or all of the data is essentially inside the .tdms file, because if I open it using excel, it displays the x and y values of all logged channels properly. Its just not very convenient for me to analyse the raw data using excel because it was sampled at 2k and excel crashes whenever working with such amounts of data.
I suspect the error may be due to some compatibility issue, perhaps affected by some of the below:
- I renamed the channels in the log programme from the default to be more explanatory.
- I also have used custom scaling for the vibration sensors, as we have the calibrated sensitivity given as mv/(mm/s)
- Amount of channels active (), sampling rate (2k) and duration of logs (several minutes).
I later configured a similar project which essentially logged the same measurement, where I did no changes to the default channel naming. These log files are viewable both in playback and if loaded into empty signal express project. I reduced the sampling rate to 1k for this programme also I believe.
If anyone has a clue how to restore the functionality of these .tdms files such that they are readable to NI signal express, I would be most thankful!!
I have included a copy of .seproj file and one example of readable "Voltage.tdms" file and one example of unreadable "Volicity_(IEPE).tdms" file (only one channel available:)
