Because the volumetric accuracy of volumetric instruments has a certain error, according to state regulations, its error must be within the range of the state recognized, so it needs to be calibrated.
According to the "Chinese People's *** and State Measurement Law" Article IX Measurement of the people's government at or above the county level, the measurement of the administrative department of the social public standard measuring instruments, departments and enterprises, institutions use the highest standard measuring instruments, and for trade settlement, safety and security, medical and health care, environmental monitoring included in the mandatory verification directory of the work of the measuring instruments, the implementation of the mandatory verification.
Not in accordance with the provisions of the application for verification or unqualified verification, shall not be used. The implementation of mandatory verification of the work of measuring instruments catalog and management, developed by the State Council. The provisions of the preceding paragraph other than the measurement of standard instruments and work measuring instruments, the use of units should be regularly calibrated or sent to other measurement and calibration institutions.
Expanded information:
"People's Republic of China *** and the State Measurement Act" Article 25 belongs to the Compulsory verification of the scope of measuring instruments, not in accordance with the provisions of the application for verification or verification failed to continue to use, shall be ordered to stop using, and may impose a fine.
Article 26 The use of unqualified measuring instruments or damage to the accuracy of measuring instruments, causing losses to the state and consumers, shall order compensation for losses, confiscate the measuring instruments and illegal income, and may impose a fine.
Article 27 of the manufacture, sale, use of measuring instruments for the purpose of deceiving consumers, confiscate measuring instruments and illegal income, and impose a fine; the circumstances are serious, and individuals or units directly responsible for personnel in accordance with the relevant provisions of the Criminal Law shall be held criminally responsible.
China's National People's Congress - Chinese people's **** and the measurement of the State Law