Proficiency Test on Transformer Oil finished

The full report can be downloaded (as .pdf-file). To download the report, please click the right mouse button and choose the "save as" option.

Download the report (iis12L04) of this Proficiency Test on Transformer Oil

For viewing the report you will need Adobe Acrobat Reader getacro.gif (712 bytes)


Summary of this proficiency test:

On 8 February 2013, the proficiency test on Transformer Oil iis12L04 was finished. It started on 24 October 2012 (see message “Proficiency Test on Transformer Oil, started” on this website) when the samples were distributed.

In this international interlaboratory study 60 participants in 28 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 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).