This standard specifies the terms, definitions, types and basic parameters, requirements, test methods, inspection conditions, inspection methods, marking and Encasement of electronic levels, etc. The standard applies to pointer and digital display electronic levels with a scale interval of 0.001 mm/m to 0.05 mm/m. Measurement range should be not less than 1/4 of the Display range, covering both types of electronic levels, including pointer and digital display. The standard emphasizes environmental testing requirements to ensure the accuracy and Stability of electronic levels under different conditions.