The on-site electronic validation method is available for a number of electromagnetic water meters. It validates the current functionality of the meters internal properties (transmitters, insulation integrity, magnetism, and digital and analogue output test) in relation to the original factory settings (the meters properties at the time of wet test certification). However, despite being an excellent method for trouble shooting potential errors with the water meter itself, it does not provide certainty that installation is within ±5% as required by the regulations. Therefore, electronic validation as a standalone method is not suitable for initial verification and must be done in conjunction with a comparative meter. However providing there have been no changes to the pump, head-works and distribution system it is suited for use as an on-going verification mechanism.