Based on: the former State Bureau of Quality and Technical Supervision in 1999, No. 6, "on the use of non-compulsory inspection of measuring instruments used by enterprises in accordance with the law of independent management of the announcement. The main content is as follows:
A non-compulsory inspection of measuring instruments used by enterprises, refers to the highest measurement of the standard instruments in addition to the enterprise and for trade settlement, safety and security, medical and health care, environmental monitoring included in the mandatory inspection of catalogs other than the standard instruments and work measurement instruments. Non-compulsory verification of measuring instruments verification cycle, according to the actual use of measuring instruments by the enterprise, in line with the principles of science, economy and accuracy of the value of their own determination.
Second, non-compulsory verification of measuring instruments by the way, according to the needs of production and scientific research by the enterprise, you can decide on their own in the unit verification or sent to other measurement and verification institutions verification, testing, any unit shall not interfere.
Three, the highest measurement standard instruments used by enterprises, and for trade settlement, safety and security, medical and health, environmental monitoring in the mandatory verification of the work of the catalog of measuring instruments, should be mandatory verification. Not in accordance with the provisions of the application for verification or verification failed, the enterprise shall not be used.