This standard specifies the product classification, technical requirements, test methods, inspection rules, signs, packaging, transportation, storage, etc. of the liquid scintillation counting system. This standard applies to the liquid scintillation counting system (hereinafter referred to as the system), whose basic components are: a) The sample transmission mechanism composed of the mechanical transmission mechanism and its control part; Detection system; c) Counting system composed of electronic circuits such as coincidence circuit, amplifier, pulse amplitude analyzer and timing counter; d) Data processing system.