The "JB/T 9398-1999 Technical Conditions for Micro Vickers hardness testers" standard specifies the technical requirements and performance indicators of micro Vickers hardness testers. This standard applies to micro Vickers hardness testers for measurement hardness of materials, ensuring its Reliability and accuracy in precision measurement. The standard details the design, manufacturing and testing requirements of hardness gauges, guides the technical specifications in the production and use process, and provides important support for high-precision Hardness measurement.