According to the measuring instruments and testing equipment is used in the location, the frequency of use and the degree of impact on the production process to develop the verification cycle, the verification cycle can be 3 months, 6 months, 12 months. Generally no more than 1 year.
1, mandatory calibration of measuring instruments must be regularly scheduled by the statutory or authorized measurement and calibration institutions.
2, non-compulsory calibration of measuring instruments, can be used by the unit according to law on their own regular calibration.
3, the unit can not be certified by the right to carry out the work of the measurement of the value of the transfer of measurement and certification bodies for certification.
4, measurement and verification should be carried out in accordance with the principle of economic rationality, proximity.
5, the unit's own verification and calibration, must be obtained by the measurement of the inspector's license.