Validation of a Iaboratory method for the traceability of a rainfail weighing gauge

Abstract

ABSTRACT This study aims to develop a Iaberatory method for the traceability of a rainfali weighing gauge, including an evaluation of the measurement uncertainty. The adopted procedure is similar to the one used for the non-automatic weighing instruments. A static approach is followed to achieve the caiibration deviation of the precipitation scale. The method used te evaluate the measurement uncertainty is based on a nonlinear mathematical model. The Monte Cano method is used to calculate uncertainties and validate estimates following the convencional Guide te the Expression of Uncertainty in Measurement (GUM) approach. Measurement uncertainty contributions of input quantities te the mathematical model used to calculate rainfail also require specific calibration procedures. Results show the