Water Flow Meters - Meeting the Requirements In Use and Subsequent Metrological Control of Meters

Household water meters as a subset of water flow meters, i.e. water meters that are used as designated meters, belong to one of the most numerous groups of meters. These meters are subject to requirements in accordance with the applicable EU metrological legislation in terms of their placing on the market (making available on the market or putting them into use), but also the national legislation of the Slovak Republic in use during the period of their valid verification. The subject of this paper is to analyze how water meters behave at the end of the verification interval with the evaluation of compliance with the maximum permissible errors after performing accuracy tests in the verification of these meters in the laboratory of the authorized person with reference to specifics and possible effects that may affect the accuracy of these meters when using them, or drawing conclusions that may be of a recommendatory nature in terms of the possible elimination of some effects.