The National Physical Laboratory give a clear definition about these differences:

Solar meter Calibration

Calibration

Calibration is defined as a set of operations that establish, under specified conditions, the relationship between the values of quantities indicated by a measuring instrument or measuring system … and the corresponding values realised by standards.

Sometimes, however, the word calibration is misused to describe the process of altering the performance of an instrument to ensure that the values it indicates are correct within specified limits (eg adjusting a instrument until its reading agrees with that of another instrument). Strictly this is adjustment – defined as the … operation of bringing a measuring instrument into a state of performance suitable for its use – and not calibration, although the nature and magnitude of the adjustment is often determined by a pre-adjustment calibration, sometimes known as an as found calibration; such a procedure thus runs:

a) first calibration (to determine the approximate magnitude of the adjustment needed)

b) adjustment

c) second calibration.

Solar meter Adjustment

Adjustment of screen colours

http://www.npl.co.uk/reference/faqs/what-is-the-difference-between-calibration-and-adjustment-(faq-force)

Indepths can be found at:

http://asq.org/quality-progress/2005/05/measure-for-measure/calibration-what-is-it.html

Metrologically speaking, the International Vocabulary of Metrology, V.I.M ed.3, gives the exact definition of these terms.

 

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