Difference
One, the purpose is different
Checking - mandatory comprehensive evaluation of measurement characteristics. Is the unity of quantitative value, check whether it meets the specified requirements. Is a top-down transfer of quantitative value.
Calibration - to determine the accuracy of monitoring and measuring devices. Bottom-up traceability, evaluation of the display value error.
Two, different objects
Checking - the national mandatory verification: measurement reference; measurement standards; for trade settlement, safety and security, health care, environmental monitoring of the work of measuring instruments **** 59 kinds. Calibration - in addition to the mandatory verification of measuring instruments and measuring devices.
Three, based on different
Checking - authorized by the state metrological department to develop a unified verification protocol.
Calibration - calibration specifications or calibration methods, can be used in the country's unified regulations, can also be developed by the organization itself.
Four, the nature of the different
Testing - mandatory, the legal measurement of the scope of management of law enforcement.
Calibration - not mandatory, voluntary traceability of the organization.
Fifth, the cycle is different
Check - according to the mandatory testing cycle specified in our laws.
Calibration - by the organization according to the use of the need to determine their own, can be regular, irregular or before use.
Sixth, different ways
Testing - only in the provisions of the verification department or by the statutory authorization of qualified organizations.
Calibration - can be self-calibration, external school or self-calibration and external school combination.
Seven, the content of the different
Testing - a comprehensive assessment of the measurement characteristics, including the evaluation of quantitative error.
Calibration - evaluation of the value error.
Eight, different conclusions
Testing - based on the verification of the range of error in the value of the regulations, to give a qualified and unqualified judgment, issued by the certificate of conformity. Calibration - do not determine whether qualified, only assess the error of the value, issued by the calibration certificate or calibration report.
Nine, the legal effect of different
Testing - the conclusion of the test is a legally binding document, as a measuring instrument or measuring device test legal basis.
Calibration - calibration conclusions are not legally binding technical documents.