Abstract：Certificate is the final product with legal effect provided by metrology and testing department to customers, and it is the concrete embodiment of the quality of verification, calibration and testing work of Metrology and testing department. This paper mainly introduces the types, basic requirements, classification and prevention methods of certificate errors, and expounds several common errors of certificates and the methods of prevention and correction through simulation cases. It provides a clearer way of thinking for personnel engaged in verification and calibration when checking certificates. It saves time, reduces blindness of work and improves certificates. Quality and efficiency provide a more powerful guarantee.
2019, Vol. 29 