Proficiency Test on Transformer Oil (Used)  started

The report letters of instruction can be downloaded here as Word document. To download a document, please click the right mouse button and choose the "save as" option.

Download for the main sample of iis15L09 here: the letter of instructions and the  report form.


Download for the main sample of iis15L09F here: the letter of instructions and the  report form.


Summary of this proficiency test:

On 4 November 2015 the proficiency test on Transformer Oil (Used)  started with 65 participants from 30 different countries.

On that date, the samples were dispatched to the laboratories. Enclosed to the samples were the instructions to the participants for this proficiency test and the material safety data sheet (MSDS).

The samples have to be analyzed on: Density at 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 deadline for reporting results is set on 4 December 2015. A laboratory that sends in results after deadline will definitely not get direct feedback in case any of its results are suspect! So be in good time to get the most out of this proficiency test.

The test results have to be reported via our internet based "results reporting platform". A login and a password can be requested via email to