Distinguishing Calibration, Verification and Calibration

The use of measuring devices helps people a lot in the fields of life, health, and scientific research. To ensure the accuracy of the measurement results, we need calibration, verification and correction. The names are almost the same, but their concepts and purposes are completely different. Let’s learn how to distinguish what is correction, what is calibration and what is verification.

What is calibration?

Calibration is the activity of determining and establishing a relationship between a measurement standard and a measuring instrument. From there evaluate the error and other technical characteristics and measurement values ​​of the quantity to be measured.

Calibration is not mandatory, based on the results of the calibration, the customer decides whether the device is still in use or not.

Explanation of the concepts in calibration:

• Measurement standard: is a concept that refers to a technical means used to represent and maintain the unit of measurement of a measurand. It is used as a standard for comparison with measuring instruments or other standards of measurement.
• Measuring means are technical means used to perform measurements.
• Measurement is a set of operations that determine a measured value for a quantity to be measured.

(Content according to the Law on Measurement No. 04/2011/QH13 dated 11/11/2011)

What is the purpose of calibration to:

• Perform calibration to maintain values ​​for the reference system and the system of measuring instruments in use. The link between them with measurement standards will ensure the consistency and accuracy of the measurement.

• Determine the error of the measuring instruments to adjust the measuring instruments to the measurement calculations.

• Ensure the reliability of the means to produce highly accurate measurement results.

• Help find or predict failures to repair measuring instruments in a timely manner.

• Conform to industry, national or international quality standards.

What is correction?

Calibration is the act of correcting the flaws of machines and equipment so that they have the required accuracy and reliability.

What is the purpose of correction?

Thus calibrating a measuring device is the act of checking and, if necessary, adjusting to give outputs that are in sync with the inputs within the specified measuring range. If not calibrated properly to give accurate measurement results, any modern device will become useless.

What is inspection?

Verification is a technical activity aimed at determining and assessing the conformity of measuring instruments with legal requirements, whether they meet specific corresponding technical criteria or not. The results will be determined by the state accrediting agency as pass or fail.

Verification is a mandatory activity for measuring instruments included in the “List of equipment required for inspection” according to the content of Decision No. 13/2007/QD-BKHCN dated July 6, 2007 of the Ministry of Industry and Trade. Science and technology.

The accreditation is only performed by a competent state agency in the field of Standards – Metrology – Quality within the specified scope.

The measuring equipment after testing is satisfactory will be stamped with inspection stamps. Either they will issue a certificate of inspection from the State management agency in charge of metrology or the facilities authorized by the State and have them legally valid throughout the country.

Distinguishing Calibration, Verification and Calibration

What are the similarities and differences between calibration and verification?

• Between calibration and verification the same :

Both are the actions of comparing a measuring instrument with a standard to assess the extent of error. Along with other technical and metrological characteristics of measuring instruments.

• Difference between calibration and verification method:

Mandatory validation is required by law, while calibration is voluntary. Based on the results of the calibration, the customer decides whether he should continue using the measuring device or not.

Distinguish between Calibration and Calibration:

Calibration and Calibration are 2 completely different regulatory actions in nature. One side of calibration is the assessment of errors, checking the accuracy of measuring machines and equipment. And the other side is the calibration correction to correct the device if necessary to get reliable accuracy.

So you have accurate information on how to distinguish Calibration, Verification and Calibration to avoid confusion in word usage, determine the right things to do to apply in work and life. Please regularly visit our website Nam Trung Son to update the most useful information not only about industrial gas, gas industry equipment but also other useful articles.