Convert GBD Files to WDH Format


Our new GBD to WDH converter gives you the ability to convert GBD files, created using GL220, or  GL820 series instruments, to WDH format. Resulting WDH files can be opened in the WinDaq Waveform Browser for observation and analysis. For convenience, and to maintain 16-bit resolution, a high-res version of the WinDaq Waveform Browser is installed along with the converter.



The straight-forward user interface allows you to select a single GBD file, or multiple files using ‘Batch mode’. As the name implies, batch mode allows you to convert a large number of files, with a single click.

Along with the data, scaling values, user annotation and event marks are transferred to the resulting WDH file.


Source GBD file


Resulting WDH file

You can download the WinDaq Converter beta here.

Comments and suggestions are welcome!




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  1. Lynn Fuller
    Posted September 24, 2013 at 1:04 pm Permalink

    I attempted to convert a 3 channel file recorded at 1 mS resolution resulting in a file size of approx. 0.8 GB. I got the following error message:

    Source: E:\13-09-23\10_31_42\130923-103142_UG_rep001.GBD
    Destination: C:\Users\Lynn\Documents\WINDAQ\130923-103142_UG_rep001.wdh
    Conversion started…
    MSG: Index was outside the bounds of the array.
    Conversion did not complete successfully.

    Any suggestions?

    • Posted September 25, 2013 at 10:55 am Permalink

      Note that the conversion utility will not work for the GL900 or GL7000 Graphtec systems. Since 1 mS sampling intervals are far smaller than the supported GL220 and GL820 loggers allow, I suspect that your instrument is not supported.

  2. Henry Sick
    Posted June 9, 2014 at 10:16 pm Permalink

    The software throws and error regarding expected software versions. Please see attached and update accordingly.

    • Henry Sick
      Posted June 9, 2014 at 10:16 pm Permalink

      Conversion started…
      MSG: Exception of type ‘Dataq.VersionException’ was thrown.
      Conversion did not complete successfully.

      • Posted June 16, 2014 at 4:22 pm Permalink

        What instrument created the GBD file? Note that this software supports only the GL820 and the GL220.

  3. Jing
    Posted September 7, 2017 at 8:29 pm Permalink

    How to extract data from the gbd file created using GL220? I want to use the excel to process the data.

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