scope:

Details step-by-step procedures for the evaluation of uncertainties in individual flow measurements arising from both random and systematic error sources and for the propagation of component uncertainties into the uncertainty of the test results. These procedures enable the following processes to be carried out: a) estimation of the accuracy of results derived from flowrate measurement; b) selection of a proper measuring method and devices to achieve a required level of accuracy of flowrate measurement; c) comparison of the results of measurement; d) identification of the sources of errors contributing to a total uncertainty; e) refinement of the results of measurement as data accumulate.