Core contents of the standard: First, classification and model, clarifying the classification method and model coding rules of elevator speed governors, which are divided into centrifugal speed governors and pendulum speed governors according to working principle; Second, comprehensive technical requirements, stipulating the technical requirements of elevator speed governors such as structure, size, material, action speed, mechanical strength, electrical performance, weather resistance, and fatigue properties; Third, unified test methods, unifying the test methods and test equipment requirements for various technical requirements of elevator speed governors, and stipulating the test conditions and data processing methods; Fourth, standardized inspection rules, clarifying the items, methods and judgment rules of factory inspection, type inspection and sampling inspection of elevator speed governors; Fifth, installation and maintenance requirements, stipulating the installation, commissioning, acceptance requirements and regular calibration requirements of elevator speed governors, and clarifying the calibration cycle and scrapping standards of speed governors.