Metrology is mainly carried out by metrological verification institutions established by the state according to law and authorized national professional metrological stations. China Institute of Metrology, provincial metrology institutes, municipal metrology institutes, county metrology institutes, and national professional metrology stations such as railway tankers or track scales can carry out verification.
Extended data:
Precautions for user measurement:
Non-compulsory verification of measuring instruments used by enterprises refers to other standard measuring instruments and working measuring instruments except the highest standard measuring instruments of enterprises and those listed in the compulsory verification catalogue of trade settlement, safety protection, medical and health care and environmental monitoring. The verification period of non-compulsory verification of measuring instruments is determined by the enterprise according to the actual use of measuring instruments, in line with the principles of science, economy and accurate value.
The verification method of non-compulsory verification of measuring instruments shall be determined by the enterprise according to the needs of production and scientific research, and no unit shall interfere.
Baidu encyclopedia-measurement