6 Conclusions

Secretariats of OIML TCs and SCs are advised to consider the additional functionalities of utility meters to first analyze their possible effect on the legal metrology aspects.

These aspects will need to include not only the actual measured quantity but also the time stamp in the case where measured values are accumulated.

Applying the device input-output model as presented in this Report, it is expected that one will become aware of the possible influences or interactions between parts of the systems and that adequate requirements will be implemented to prevent undesired hardware interactions.

These could be requirements for immunity to environmental influences created by emissions from adjacent instruments and possibly also for the level of the emissions to the environment. Parts (but not all) of these are at present covered by the provisions suggested in D 11.

Concerning software, it is assumed that when choosing a protection level the applicable provisions in OIML D 31 can be selected. These provisions will not only need to cover the securing of the measurement data related to the measurand, but also take into account the time-related measurements.

Inclusion of requirements for data transmission communication depends on whether these data are relevant to the ultimate verification of the transaction parameters.