5.2.2 Potential influences/disturbances and limitations

The need to evaluate the parts of the system depends on the location of the primary registers in which the results of measurement quantities and the associated time intervals are stored. The need to evaluate data transmission securing measures will depend on this location.

Furthermore, the smart metering software/firmware should include the securing of adequate time recording which, in turn, implies accurate time-stamping and interval measurement which are of sufficient resolution.

Time measurement can be performed to a very high degree of accuracy when using up-to-date techniques. In principle, this should not limit the accuracy in establishing the overall result of the measurements, but attention has to be paid to synchronizing and to avoiding delays as a consequence of processing and transmission. The securing of the synchronizing method and means shall be such that the accuracy of the time measurement has no consequences on the overall measurement result.