What is the difference between metrological calibration, metrological testing and metrological verification?

1.verification is included calibration calibration, evaluation of measuring instruments measurement performance, and to determine whether qualified, (accuracy, stability, sensitivity); with a strong legal, mandatory, the issuance of a certificate of verification (national institutions, authorized, legally binding)

2.calibration, to determine the value or error in the display value, including the determination of other measurement performance, if necessary.

3. Testing, comparison, monitoring the reliability of the indicated value of the measuring equipment; standardizer to form a comparison with the instrument under test to determine whether it is working properly.

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