Determination of water in insulating liquids by automatic coulometric Karl Fischer titration

This international specification outlines a precise analytical method for determining the water content within insulating liquids using automatic coulometric Karl Fischer titration. The procedure establishes standardized protocols to ensure accuracy and repeatability in measuring trace moisture levels, which are critical parameters for the performance and longevity of dielectric fluids used in high-voltage electrical equipment. By defining specific apparatus requirements, reagent preparations, and calibration techniques, the document provides a unified approach for laboratories to assess the purity of these essential liquids. The methodology is designed to minimize human error and enhance the sensitivity of measurements, allowing for the detection of minute quantities of water that could otherwise compromise insulation integrity. It serves as a technical guide for implementing quality control measures in the production, maintenance, and testing of electrical systems where the presence of moisture in insulating media must be strictly monitored and controlled to prevent equipment failure. The described approach facilitates consistent data exchange and comparison across different testing facilities globally.