Calibration Certificates, Traceability System Diagram, and Certificates of Non-Conformity

Uncertainty is the value obtained from data dispersion in the data range (already known), using measured results, without assuming the true value (generally unknown). Uncertainty is defined in the GUM as “Characteristic parameters given to the data dispersion of values linked to logically obtained measured variables that are incident to measured results.” In other words, while an error is the discrepancy between a measured value and a true value, uncertainty is the extent of the variability from a measured value, and the true value lies within that range.

 Reference: See the PDF file [Technical Data: 6. Torque devices as measuring tools] available from Download.