Most measuring instruments have several errors that can affect the measurements shown. When combined, these errors, first with errors of the same instrument (as directly related to an instrument, tolerance), then the total errors of the additional instruments used in conjunction with a displayed value (ie, an instrument loop) the result is a total uncertainty of reading. Perhaps an example may clarify: The recommended air pressure for a brand of tires on a vehicle model. A newsletter informs the users of pressure above and the recommended pressure. But how can the user ensure that the pressure is read on another continent with a different instrument is correct? The answer is a science known as Meteorology, which are the registration and calibration systems necessary to provide assurance of accurate traceability of an instrument (to NIST or other organization). Another example would be the chair in which you are seated. It is likely that the parts used to construct and manufacture upholstered chair, were manufactured in more than one site. How do the pieces fit so well, the paint or chrome, or printing the packaging is so uniform? and insurance has gone through a number of containers and machinery.

The answer lies in repeated accurate measurements of exchange of instruments of the same chain of precision. Now good measure, why the radiometric calibration? The answer to this question lies in your use of the computer: If you: A. Use specific temperatures B. related to IR Use IR temperatures associated Delta C. Use images with corresponding temperatures nuances involving the displayed image D.