Measurement calibration: refers to the evaluation of measuring instruments for the measurement of performance, to determine whether it is qualified for all the work carried out, including inspection and sealing and stamping.
Definition of calibration: a set of operations to determine, under specified conditions, the relationship between the quantitative value indicated by a measuring instrument or measuring system, or the quantitative value represented by a physical gauge or reference material, and the corresponding quantitative value reproduced by a standard.
Checking and calibration of the same point is: all belong to the traceability of the value of an effective and reasonable methods and means, the purpose is to achieve the traceability of the value. The difference between the two are:
1. Accreditation is a comprehensive assessment of the measurement characteristics of measuring instruments; and calibration is mainly to determine its value.
2. Accreditation of measuring instruments to make a qualified or unqualified conclusion; and calibration does not determine the qualification of measuring instruments.
3. Accreditation should be issued certificate, stamped or notice of failure; and calibration is issued calibration certificate or calibration report.
4. Accreditation is based on measurement and verification procedures; and calibration is based on calibration specifications.