Abstract：In the low gas flow measurement area, passive gas piston prover with clearance-sealed are widely used, because it has the advantages of eazy operation, high measurement efficiency, no mercury seal, easy to carry, and has function of automatic temperature and pressure compensation. However, there is no calibration specification for passive gas piston prover with clearance-sealed in China,The reciprocating motion of the passive piston will cause pressure fluctuation in the measuring pipeline.The traceability for passive gas piston prover with clearance-sealed using flow measurement method directly still has some difficulties. In this situation, a new traceability method for calibration passive gas piston prover with clearance-sealed by geometry measurement method is detailed described, the uncertainty of the geometry measurement method is also evaluated, and comparison with relevant foreign institution is performed for uncertainty verification.The test results show that the passive gas piston prover with clearance-sealed can be calibrated by geometry measurement method perfectly.
BERG R F, TISON S A. Two primary standards for low flows of gases ［J］. Journal of Research of the National Institute of Standards and Technology, 2004, 109: 435-450.
YING L C, LIN W T, CHIANG C L. Establishment and verification of mercury-sealed piston prover for primary standard ［C］//Flomeko 2019, Portugal, Lisbon, 2019.
BENKOVA M. New primary microflow standard with piston prover ［C］//Flomeko 2019, Lisbon, Portugal, 2019.
［13］
NAKAO S, TERAO Y, TAKAMOTO M. Development of the primary standard for very low gas flow rate［J］. Flow Measurement and Instrumentation, 2002, 3: 65-70.
ZHANG Y S,BAI Y. The Passive Piston Gas Primary Standard ［J］. Journal of Astronautic Metrology and Measurement, 2011,31(1):67-70.
［10］
JING L, GUSTAF O, BO M. A volumetric meter for monitoring of low gas flow rate from laboratory-scale biogas reactors［J］. Sensors and Actuators, 2004, 97: 369-372.
IMAMURA K, HORINOUCHI O, OKUYAMA T, et al. The primary dynamic gravimetric system for gas mass flow measurement［J］. Flow Measurement and Instrumentation, 2020, 76: 1-8.
ZHANG H, WANG L,HUANG D H, et al. Uncertainty Evaluation and Verification of 2~4MPa Gas Flow Standard Facility［J］. Acta Metrologica Sinica, 2023, 44(5): 733-749.
［18］
气体层流流量传感器:JJG736-2012［S］. 2012.
WANG X L,CHEN Y C,JIANG Y X, et al. Design and measurement characteristic study on micro gap-type laminar flow meter ［J］. Chinese Journal of Scientific Instrument, 2019,40(11):48-54.
CHEN C,ZHU B Y,SHEN Q. Calibration Piston Gas flow Calibrator by Positive Pressure Gas Flow Standard Facility［J］. Metrology and measurement technique, 2021, 48(6): 88-90.
CHEN P, ZHANG D F. A calibration method for piston gas flow meters suitable for small flow rates ［J］. Industrial Measurement, 2009,19(6): 30-31.
［15］
BOBOVNIK G, KUTIN J. Effects of inclination of a clearance-sealed piston prover［C］//Flomeko 2019. Lisbon, Portugal, 2019.
CHEN C, YAO X H, LIANG Y Z. Calibration Critical Flow Venturi Nozzles by Bell Prover Gas Flow Standard Facility ［J］. Acta Metrologica Sinica, 2012, 33(5A): 254-258.
2024, Vol. 45 
