Users to buy measuring instruments, should be measured immediately to the measurement of the performance of its calibration institutions, to obtain a certificate of conformity before being put into use.
Factory certificate of conformity is a measuring instrument in the product factory by the internal technical inspection and confirm the quality of the certificate issued by the certificate of conformity, is the whole batch of products of the overall performance of the overall labeling. Validation certificate is a certificate of conformity for the measurement of measuring instruments measuring performance assessment, is issued by the statutory metrological verification and testing agencies, is the recognition of measuring instruments measuring performance, with legal and impartiality.