21/30439565 DC

This standard 21/30439565 DC BS EN 14154-4. Water meters is classified in these ICS categories:

• 91.140.60 Water supply systems

This document specifies definitions, requirements and testing of additional functionalities for water meters, without metrological impact, in combination with Additional Functionality Devices (AFD) and in response to EU/EFTA Mandate M/441 EN. These AFDs are considered as "ancillary devices" as defined in EN ISO 4064-1:2017 and EN ISO 4064-4:2014. This document does not cover the changing of metrological software within the meter or the upload/download of metrological software. NOTE A manufacturer can claim compliance only for additional functionalities described in this document. It is not mandatory that an AFD complies with all additional functionalities described herein.