StandardDetails

1.1 This Recommendation applies to water meters used to meter the actual volume of cold potable water and hot water flowing through a fully charged, closed conduit. These water meters shall incorporate devices which indicate the integrated volume. 1.2 This Recommendation sets out the conditions with which the water meters shall comply to meet the requirements of the Services of Legal Metrology in countries where these instruments are subject to State controls. 1.3 This Recommendation also applies to water meters based on electrical or electronic principles, and to water meters based on mechanical principles incorporating electronic devices, used to meter the actual volume flow of hot water and cold potable water. It also applies to electronic ancillary devices. As a rule ancillary devices are optional. However, national or international regulations may make some ancillary devices mandatory in relation to the utilization of the water meter. 1.4 In addition to the metrological and technical requirements included in this Part 1 (R 49-1) the methods of examination and testing are included in Part 2 (R 49-2 [9]) and the Test Report Format is included in Part 3 (R 49-3 [11]).