ČSN EN 14154-4 (257811)

Annotation of standard text ČSN EN 14154-4 (257811):

This European Standard 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 to be considered as "ancillary devices" as defined in EN ISO 4064 1 and EN ISO 4064 4.
This European Standard 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 European Standard. It is not mandatory that an AFD complies with all additional functionalities described herein