JJF 1620-2017 in English

This document provides a calibration specification for devices used to measure internal resistance of batteries. It outlines the methods, conditions, and requirements necessary to ensure the accuracy and reliability of these instruments. The specification covers various aspects including the calibration environment, reference standards, calibration procedures, and the evaluation of measurement uncertainties. It is applicable to a wide range of battery internal resistance testing equipment, ensuring consistency and traceability in measurement results. The document also includes guidelines for the verification and periodic calibration of such devices to maintain their performance over time. Detailed information on the calibration process, data recording, and result reporting is provided to support effective implementation and compliance with measurement standards.