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Title: A Novel Concept Of A Gas Flow Calibration Rig
Author: A. Pfau, J. Honegger, H. Hafelfinger, m. Carr
Source: 2006 International Symposium on Fluid Flow Measurement
Year Published: 2006
Abstract: Within a project period of one and a half years a new calibration facility at Endress+Hauser Flowtecs production centre in Reinach, Switzerland, was developed, built and commissioned. The first run with a meter under test happened in May 2005. In January 2006, the facility was accredited according to ISO/IEC 17025 to within 0.3% best uncertainty covering a range of air mass flow from 0.05 to 10000kg/h. The stated objective was to provide a facility capable of operating to very high levels of accuracy over a wide range of flows. To achieve this, a combination of rotary piston gas counters, turbines and critical nozzles were chosen for the reference meters, all operating at near atmospheric conditions.

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