Traceability and Validation of Liquid Flow Measurands

摘要

Measurement of flowing liquids in closed conduits is present in many different applications in daily life, e.g. water or heat metering, gas metering, filling stations, in the chemical industry, the food industry, for batching or for process regulation. Usually liquid flow meters are used to fulfil most of these requirements. The demands of the application on flow meters are high. There is a general expectation that meters show the correct value which is necessary for correct billing. This article describes the requirements on liquid flow meters with regard to the measurement accuracy.