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| The Close Loop Standard Facility of High Pressure Gas Flow |
| ZHANG Han1,2,LI Chun-hui2,CUI Li-shui2,CAO Pei-juan2,3 |
1.College of Engineering Measurement, China Jiliang University, Hangzhou, Zhejiang 310018, China
2.National Institute of Metrology, Beijing 100029, China
3.Hebei University, Baoding, Hebei 100075, China |
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Abstract The high pressure close loop gas flow standard facility in National Insititute of Metrology is discribed, which is constructed in 2014. The introduction and uncertainty analysis of the facility was investigated. With 4 sets of turbine meters as the master meters, the maximum flowrate could be 1600m3/h at 2.5MPa for the high pressure close loop working gas flow standard. The expanded uncertainty is 0.21% (k=2). The uncertainty of the facility realization was guaranteed by the calibration of master flowmeters in original position and the pressure measurement method with absolute pressure transmitters plus differential pressure transmitters.
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Received: 31 March 2015
Published: 19 April 2017
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Corresponding Authors:
Chunhui Li
E-mail: lich@nim.ac.cn
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2017, Vol. 38 
