ISO 9104:1991, Measurement of fluid flow in closed conduits - Methods of evaluating the performance of electromagnetic flow-meters for liquids

The methods specified are intended for use by manufacturers to determine the performance of their products and by users to verify manufacturer's performance specifications. The test conditions represent those which commonly arise during use. The values specified herein should be used where no other values are specified by the manufacturer. ISO 9104 applies to the evaluating the performance characteristics when the flow-meter is subjected to identified influence quantities and only to electromagnetic flow-meters.