Compulsory verification should implement the principle of economy, rationality and proximity. What should be used to identify?

The principle of "economic and reasonable, close to the site" should be implemented in compulsory verification, and the verification should be carried out by (d).

A. Units using compulsory inspection measuring instruments

B. Units using compulsory inspection measuring instruments shall contact the verification unit by themselves.

C. metrological verification institutions

D. metrological verification institutions designated by government metrological departments.

One. Introduction of compulsory verification:

1, compulsory verification refers to the statutory metrological verification institution or authorized metrological verification institution affiliated to the metrological administrative department of the government, which conducts fixed-point and regular verification on the working measuring instruments of social public measurement standards and the highest measurement standards used by departments, enterprises and institutions listed in the national compulsory verification catalogue for trade settlement, safety protection, medical and health care and environmental monitoring.

2. Working measuring instruments subject to compulsory verification must be listed in the catalogue of compulsory verification and directly used for trade settlement, safety protection, medical care and environmental monitoring. The so-called direct use refers to those measuring instruments that serve the society and cause conflicts of interest, and the obtained values will directly play a role in the above four aspects.

3. According to the provisions of Article 9 of the Metrology Law, compulsory verification refers to the fixed-point periodic verification of the public standard measuring instruments, the highest standard measuring instruments used by departments, enterprises and institutions designated by the metrological administrative department of the government at or above the county level or authorized by the metrological technical institutions, and the working measuring instruments listed in the compulsory verification catalogue of trade settlement, safety protection, medical and health care and environmental monitoring.

Second, knowledge expansion:

1. Non-compulsory verification refers to the verification of measuring instruments according to law. Under normal circumstances, for the equipment that does not need compulsory verification but needs traceability, the user can find a qualified testing institution for verification, calibration and testing before using it.

2. If it does not meet the measured performance, it must be repaired and tested to meet the measured performance before it can be used. If the measurement performance cannot be satisfied after maintenance, new equipment needs to be replaced. In addition, the factory certificate of newly purchased equipment cannot replace the inspection certificate of the inspection institution, and it can only be used after being inspected by the inspection institution and meeting the metrological performance.