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| The Verification on the Capability of High Pressure pVTt Standard Facility |
| CAO Pei-juan1,2,LI Chun-hui1,CUI Li-shui1,ZHANG Han1 |
1. National Institute of Metrology, Beijing 100029, China
2. Hebei University, Baoding, Hebei 071002, China |
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Abstract The high pressure pVTt gas flow standard facility in National Institute of Metrology(China), the expanded uncertainty of the facility could be 0.06% (k=2), while the expanded uncertainty of discharge coefficient of calibrated sonic nozzle is 0.08% (k=2). The measurement capability of the new pVTt facility was verified with the comparisons among the existed pVTt facility and the gas flow facilities in Physikalisch-Technische Bundesanstalt(Germany) with 3 sonic nozzles as transfer meters.The comparison results show in good agreement with each other of devices.
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Received: 30 December 2015
Published: 27 September 2017
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2017, Vol. 38 
