Insulating liquids – Test methods for the determination of interfacial tension of insulating liquids – Determination with the ring method
|Publication Date:||1 September 2018|
|ICS Code (Insulating oils):||29.040.10|
This document establishes the measurement of the interfacial tension between insulating liquid and water by means of the Du Noüy ring method close to equilibrium conditions. In order to obtain a value that provides a realistic expression of the real interfacial tension, a measurement after a surface age of approximately 180 s is recorded.