What is calibration?

What is calibration?

The word calibration in Metrology is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy.

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.