GB/T 6320-2008

This standard specifies the terms, definitions, and technical requirements for mechanical dial comparators, which are precision instruments used to measure small linear displacements by amplifying movement through a lever and gear mechanism. It is applied in manufacturing quality control and metrology laboratories for comparative length measurements, such as checking the dimensional accuracy of machined parts, gauges, and workpieces against a reference standard. The standard ensures consistency in accuracy, repeatability, and calibration procedures for these comparators across industrial inspection and testing contexts.