Transformers Magazine Vol. 9, No. 1, 2022
The most recent IIS reports on comparison tests for the DGA clearly indicate that the participating laboratory on average has not achieved repeatability dictated by both ASTM and IEC standards. This may be seen in the reference IIS report 2020 . Although the headspace extraction method is the most widespread extraction methodology today, other options are favoured by online and portable devices, such as membrane extraction or bubbling. For more reliable, repeatable, and versatile results for different oil types, it is preferred to choose o...
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