Proficiency Test on Transformer Oil finished

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Download the report (iis11L04) of this Proficiency Test on Transformer Oil

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Summary of this proficiency test:

On 24 January 2012, the proficiency test on Transformer Oil iis11L04 was finished. It started on 26 October 2011 (see message “Proficiency Test on Transformer Oil, started” on this website) when the samples were distributed.

In this international interlaboratory study 35 participants in 21 different countries have participated.

The samples were tested on : Density @ 20°C, Di-electric dissipation Factor, Specific Resistance, Breakdown Voltage, Interfacial surface tension , Colour, Water, Acid number (neutralization number), and Furanic Compounds.

The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated by i.i.s. for each participant are tabulated. Also, for each test, the calculated summary (e.g. mean, standard deviation and reproducibility) is given.

In the report also an evaluation of the test results is given. Problems encountered in the analyses are mentioned and - where possible - suggestions for quality improvement are formulated. For each test a comparison is made between the results of the group of participants and the requirements given by the relevant standard (e.g. ISO, DIN, ASTM).

Interested parties can order a hard copy of the report; the price for non-participants is Euro 35.