Calibration in measurement technology and metrology is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, sound tone, or a physical artefact, such as a metre ruler.
The outcome of the comparison can result in
no significant error being noted on the device under test, a significant error
being noted but no adjustment made, or an adjustment made to correct the error
to an acceptable level. Strictly speaking, the term calibration means just the
act of comparison, and does not include any subsequent adjustment.
The calibration standard is normally traceable to a national standard held by a National Metrological Institute.
This article quoted https://en.wikipedia.org/wiki/Calibration
Purpose of calibration:
Provides the instrument with traceability and optimized quality, the instrument meets ISO 9000 calibration specifications, and maintains the instrument's high temperature and pressure measurement for high safety to achieve ideal mechanical operation and performance, and reduce process equipment and sensors accidental repair or replacement.
Yuden- Tech Calibration Laboratory
Yuden- Tech (eYc) has seven international calibration laboratories TAF (ISO / IEC 17025) international certificate (certification number: 3032), which are recognized by the International Laboratory Accreditation Alliance ILAC and are used worldwide. The National Certification Foundation (TAF) is a certification body accredited by the International Laboratory Accreditation Alliance ILAC and has signed an inspection mutual recognition agreement with ILAC. It provides accurate calibration services through TAF on behalf of internationally recognized grade standards and can be traced back to The (SI unit) has a measurement uncertainty evaluation report and calibration procedures for each system to maintain the best quality and stability of your sensor and instrumentation standards.