GB/Z 42625-2023 is a guiding standard for the characteristics of Quadrupole mass spectrometer, QMS for vacuum scoring pressure measurement in the field of vacuum technology. It explains in detail the key characteristics of Quadrupole mass spectrometer, QMS for partial pressure measurement, including Mass range, resolution, Sensitivity and other parameters definition and quantification methods. Specify instrument calibration methods and operating procedures, and clarify test Environmental requirements. The standard provides professional guidelines for the selection, use and performance evaluation of Quadrupole mass spectrometer, QMS, to help scientific research, industry and other fields to accurately use such instruments for partial pressure measurement in vacuum environment, to ensure the accuracy of vacuum system research and application.