The National Metrology Technical Specification CN-JJF, published on January 1, 2024, titled "Calibration Specification for Planetary Cement Mortar Mixer", with standard number JJF 2094-2024, provides detailed guidelines and procedures for the calibration of planetary cement mortar mixers. This specification aims to ensure accuracy and reliability in measurements taken by these machines, which are essential tools in the production and testing of construction materials such as concrete. It outlines specific parameters that need to be monitored during calibration including mixing time, rotational speed, and uniformity of mixture. The document also specifies permissible measurement errors for various components of the mixer to maintain its operational precision over time. By adhering to this standard, manufacturers and users can verify the performance quality of planetary cement mortar mixers, ensuring they meet industry standards and contribute effectively to construction projects.
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