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Title: EUROMET Project 852: A Comparison Between Italian And Swiss Gas Flow Standards In The Range 0.3 To 25 m3/h
Author: Henri Baumann, Giorgio Cignolo, Mario Clausen, Roberto Goria
Source: 2006 International Symposium on Fluid Flow Measurement
Year Published: 2006
Abstract: An interlaboratory comparison (EUROMET Project 852) of four primary standard gas provers was carried out between the Italian and Swiss NMIs (IMGC/INRIM and METAS) from 0.3 m3/h to 25 m3/h using ambient air. The transfer standard was a G25 rotary piston meter. The comparison showed a full compatibility of all four provers above 4 m3/h, whereas at lower flows some discrepancies occurred, whose causes are identified and discussed. The results confirm the improved accuracy of the large piston provers pioneered by both laboratories, if compared to bell provers, a couple of which were also tested.

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