Uncertainty Budget Evaluation of High Precision Length Measuring Equipment

According to international standards, measurement uncertainties have to be stated with all measurements and any measurement result is meaningless without a quantitative statement of uncertainty. Measurement uncertainty is characterized by the dispersion of values that could be attributed to the result of measurement. The dispersion of measurement result is obtained from the dispersion of various quantities influencing the measurement. The suitable information about the parameters which influence the measurement is described by probability density functions. This paper describes a method for evaluation of measurement uncertainty of high precision length measuring equipment by considering various factors associated with the measurement process.