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| Measurement Errors of Piston Pressure Gauge for Mass Weights and Pressure Weights |
| PANG Gui-bing1,YANG Yi1,FAN Shuang-jiao1,YANG Yuan-chao2 |
1. College of Mechanical Engineering and Automation,Dalian Polytechnic University,Dalian,Liaoning 116034,China
2. National Institute of Metrology,Beijing 100029,China |
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Abstract The types of weights used in existing piston pressure gauges are pressure nominal weights and mass nominal weights,both of which produce different principles of error and lead to different outcome of error. For free distortion pistons,a pressure error model is developed based on the effect of the deformation coefficient on the effective area of the piston,and a general formula for the relative error in pressure generated by using pressure nominal weights and mass nominal weights is derived. Using a piston pressure gauge with a measurement range of 10 to 510MPa as the object of study,error calculations and comparative analyses are carried out to obtain the variation pattern of the pressure errors of the two types of weights. The results show that,under the same conditions,the pressure scale weights produce an additional error of up to -0.0041%within each pressure band due to the repeated use of small,unnumbered weights compared to the mass scale weights.
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Received: 21 November 2022
Published: 27 December 2023
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2023, Vol. 44 
