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Download the report (iis10L03) of this Proficiency Test on Transformer Oil
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Summary of this proficiency test:
On 20 January 2011, the proficiency test on Transformer Oil iis10L03 was finished. It started on 20 October 2010 (see message “Proficiency Test on Transformer Oil, started” on this website) when the samples were distributed.
In this international interlaboratory study 50 participants in 24 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), Cadmium 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.