Calibration of measuring instruments and measuring instruments calibration regulations

The main difference between calibration and verification

Purpose:

Calibration - to determine for themselves the accuracy of monitoring and measuring devices. It is a bottom-up traceability of quantitative values and evaluation of the display value error.

Checking - mandatory comprehensive evaluation of measurement characteristics. Is the unity of measurement value, check whether it meets the requirements of the regulations. Top-down transfer of values.

Object:

Calibration - in addition to the mandatory verification of measuring instruments and measuring devices.

Checking - the national mandatory verification: measurement reference apparatus; measurement standards; for trade settlement, safety and protection, medical and health care, environmental monitoring of the work of measurement of seven categories **** 59 kinds.

Based on:

Calibration - calibration specifications or calibration methods, can be used in the national unified provisions, or by the organization itself.

Checking - unified by the state authorized by the measurement department to develop calibration procedures.

Nature:

Calibration - not mandatory, voluntary traceability of the organization.

Testing - mandatory, is the legal measurement of the scope of management of law enforcement.

Period:

Calibration - by the organization according to the use of the need to determine their own, can be regular, irregular or before use.

Checking - implemented in accordance with the mandatory checking cycle prescribed by our laws.

Methods:

Calibration - can be self-calibration, external calibration or self-calibration and external calibration combined.

Checking - can only be carried out in the prescribed checking department or the organization with qualification by legal authorization.

Contents:

Calibration - evaluation of the error in the display value.

Testing - a comprehensive evaluation of the measurement characteristics, including the evaluation of the error of measurement.

Conclusion:

Calibration - not to determine whether the pass, only the evaluation of the error in the display value. Issue a calibration certificate or calibration report.

Checking - according to the range of error in the value of the test specification, to give a qualified or unqualified judgment. Issue a certificate of conformity.

Legal effect:

Calibration - calibration conclusions are not legally binding technical documents.

Testing - the conclusion of the test is a legally binding document, as a measuring instrument or measuring device test legal basis.