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Title: Calibration Facilities For Water Flowrate In Nmij
Author: Noriyuki Furuichi, Yoshiya Terao, Masaki Takamoto
Source: 2009 International Symposium on Fluid Flow Measurement
Year Published: 2009
Abstract: Water flow calibration rigs in NMIJ are represented. In response to a recent requirement of an actual flow calibration, NMIJ has expanded the calibration flowrate for water flow. For the small flowrate range, the calibration rig with 10 kg weighing system was developed. The expanded uncertainty of this calibration rig is 0.035%. For the large flowrate, the calibration rig which can control the temperature was also developed. Then, the flowrate range is expanded from 0.002 m3/h to 12,000 m3/h. The expanded uncertainty of this calibration rig is 0.077%. In this paper, the overview of calibration facility of water flowrate in NMIJ and the detail of the new calibration rigs are described.

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