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Title: Development Of A Servo Pd Oil Flowmeter For A Transfer Standard
Author: Takashi Shimada, Yoshiya Terao, Masaki Takamoto, Seigo Ono, Shingo Gomi
Source: 2002 International Symposium on Fluid Flow Measurement
Year Published: 2002
Abstract: A new servo PD flowmeter was developed in order to achieve wide rage ability, a long-term stability, and high accuracy in oil flow measurement. At first, the characteristic of the flow inside the flowmeter was investigated through flow visualization by using a transparent flowmter model. Secondary, a servo control system was constructed in order to compensate for mechanical friction and to control the leakage from the clearance. Finally, the performance of the new servo flowmeter was investigated for several kinds of oil. These results show that the error of the flowrate is better than 0.2 % over 1:10 of flow range. This newly developed servo PD has been selected as a transfer standard for a new calibration facility for hydrocarbon flow at NMIJ. These flowmeters in 50, 100, and 150 mm diameter are used at the flowrate range between 3 to 30, 7.5 to 75, and 30 to 300 m3/h, respectively.




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