This European Standard specifies the conversion of raw data from an automated measuring system (AMS) to reported data by a data acquisition and handling system (DAHS). This specification includes: - requirements for the handling of data; - requirements for the reporting of data; - calculation procedures required. The main items covered by this European Standard are given by, but not limited to raw data acquisition, raw data validation, data correction and data averaging. This European Standard supports the requirements of EN 14181 and legislation such as the IED and E-PRTR. It does not preclude the use of additional features and functions provided the minimum requirements of this European Standard are met and that these features do not adversely affect data quality, clarity or access.