This standard provides a performance test method for fixed wavelength photometric detectors in liquid chromatograph systems, suitable for detectors operating in the 210nm to 800nm Wavelength range. The standard describes the static and dynamic performance test methods of detectors at different wavelengths, usually using 254nm wavelengths for testing, and Miscellaneous wavelengths can also be selected. The main focus is on the performance indicators of photometric detectors such as Absorbance calibrate and drift measurement to ensure the accuracy and Stability of detectors in liquid chromatograph analysis. The standard does not deal with safety issues in actual use, and users need to formulate corresponding safety specifications according to the actual situation.