GB/T 20245.2-2013 Focused electrochemistry analyzer performance representation for pH value measurement. It specifies various indicators used to evaluate the measurement ph value performance of such analyzers, covering accuracy, repeability, stability, etc. Detailed description of relevant test conditions and operating procedures, such as the selection of calibrating solution, measurement environment requirements, etc. By standardizing these contents, it provides a unified and clear basis for the production, testing and use of electrochemistry analyzers, helps to ensure the reliability of analyzers in the measurement of ph value in various fields, and promotes the development of relevant industry norms.