IEC 62021-3:2014

Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils

IEC 62021-2:2007

Insulating liquids - Determination of acidity - Part 2: Colourimetric titration

IEC 62021-1:2003

Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration