During the validation of a metering control system, a KROHNE engineer will verify, amongst other items, whether all components are still sealed as per metrology requirements, that parameter settings have not changed, and that firm- and hardware versions are still as per certification. Also, event and alarm logs will be reviewed and any necessary corrective actions defined.

Usually validations are combined with a maintenance visit where analogue inputs are re-calibrated and data communication is tested, filters are cleaned or replaced and operational items such as CPU loadings are analysed.