GB/T 2439 - 2001 is used to determine the conductive and dissipative performance resistivity of vulcanized rubber or thermal plasticity rubber. Measuring methods based on electrical principles are specified, and technical specifications for testing instruments such as high resistance meters are specified. Detailed preparation of rubber samples, covering shape, size and surface preparation requirements to ensure that the samples are representative. Standardize the test environment, specify conditions such as temperature and Humidity, and describe the measurement operation process, including electrode installation, voltage application and resistance value reading. According to this standard, the rubber-related resistivity can be accurately determined, providing key performance data for rubber applications in electronics, explosion-proof and other fields, and assisting Product Research & Development and mass control.