Data Collection Frequency

[brethigh]

Hello,

I'm trying to record some data at 25,000 Hz.  All of the hardware I'm using has this capabilities, but my concern is the software.  Flexlogger allows me to convert to a csv file at a rate of only up to 1,000 Hz.  I believe the TDMS file can record at the 25,000 Hz, but I'm not fluent with Diadem (nor do I have a license) and I don't believe any of the engineers using this data are either.  Can the TDMS format convert to a different software?  Thanks.

[CyGa · Accepted solution]

Hi Brethigh,

You can open a TDMS file in Excel thanks to this free addon :http://www.ni.com/example/27944/en/

There are also some libraries that will do that for Matlab for example : https://www.mathworks.com/matlabcentral/answers/278045-how-to-open-tdms-file-in-matlab

There are also nice free TDMS viewers like SignalX SCOUT : https://signalxtech.com/products/scout/download-scout/

[Tommy_G]

Hi brethigh,

Yes, the TDMS file format has the capabilities of recording the data at 25kHz and beyond. It was designed to write and read data at very high speeds while maintaining a hierarchical system of descriptive information (metadata). As CyGa mentioned above, you can open and view TDMS files within a variety of applications such as Microsoft Excel. 

In addition, you can also export the TDMS file to a variety of other file formats using the DIAdem-based FlexLogger TDMS Viewer.

To do this you would open your file either in FlexLogger or where it was saved on the PC. Then click on the Save As button at the top.

Then you will see within the drop down with some of the file formats you can save the data as:

 

If the file format you would like to export to is not within this list, you have the ability to extend the data file capabilities by adding a DataPlugin. You can search through all of the supported DataPlugins here: https://www.ni.com/downloads/dataplugins/. 

Is there a specific file format you are wanting to export your data to?

Please let me know if you have any questions.

[brethigh]

Simply opening in Excel should be fine since we won't be recording for an extended period of time.  Although I'm looking at the Scout software and I may look into that as well.

Thank you!