Novel calibration facility for water flow with large temperature span

A. K. Niemann, S. Haack, J. Frederiksen

Abstract

Danish Technological Institute (DTI) is extending the flowrate of the existing flow rig up to 1.000 m³/h in the temperature span from 4 – 85 °C and pipe dimension up to DN400, and thereby become a unique calibration facility. The new test rig will serve as the national primary standard for the field of water flow measurement and thereby replacing the current at DTI.<BR />From 0.5 – 500 m³/h the test rig is based on gravimetric principle using a diverter principle. From 500 – 1000 m³/h the test rig is based on reference flow metering. The reference flow meters will consist of two high precision Coriolis flowmeters mounted in parallel. The reference flowmeters are placed in the same circuit as the gravimetric system. This setup allows for calibration of each reference flowmeter against the gravimetric method without dismounting the meters. This ensures low uncertainties and traceability to a primary standard and possibility to participate in international intercomparisons. <BR />The new flow rig will be highly digitalized with a high degree of automation. Communication with flowmeters under test will be flexible with both conventional analogue interfaces but also through industrial communication standards.

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IMEKO TC

TC9 - Flow Measurement

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