DC shunt is not a mandatory inspection program

The so-called compulsory inspection, refers to the measurement of government administrative departments under the statutory measurement and calibration institutions or authorized measurement and calibration institutions, the public standard of measurement, departments and enterprises, institutions using the highest standard of measurement, for trade settlement, safety and security, medical and health, environmental monitoring in four areas and included in the national catalog of measurement instruments, the implementation of a fixed period of time a kind of calibration. Not in this scope of measuring instruments, does not belong to the compulsory inspection program. However, as a measuring instrument, should be carried out periodic calibration, calibration of qualified parties can continue to use. DC shunt even if not in the above directory of mandatory inspection, but also should be sent to the measurement department to do periodic calibration, to confirm that the error in the qualified range. For a variety of business accreditation certification, are assessed for the validity of the measurement certificate of measuring instruments.