measuring uncertainty

The measurement uncertainty reflects the uncertainty in the measurement result. It is expressed in the fact that several measured values of the same measurand differ in their results.

The measurement result is only complete if it contains the measured value as well as the associated uncertainty. DIN 1319 describes two methods for the determination of uncertainties. Determination method A describes a statistical procedure by analyzing series of measurements, and in determination method B the uncertainty of measurement is determined "by other means".

In DIN 1319, the measurement uncertainty is described as follows: Parameter assigned to the measurement result, which characterizes the scatter of values that are reasonably assigned to the measurand. The parameter can be a standard deviation or a multiple thereof.