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Summary of this proficiency test:
On 09 February 2015, the proficiency test on used Transformer Oil iis14L30 was finished. It started on 5 November 2014 (see message Proficiency Test on used Transformer Oil, started on this website) when the samples were distributed.
In this international interlaboratory study 61 participants in 33 different countries have participated.
The samples were tested on :
The samples can be analyzed on: Density @ 20°C, Di-electric dissipation Factor, Specific Resistance, Breakdown Voltage, Interfacial surface tension ,Flash
Point, Kinematic Viscosity 40°C, 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 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).