Standard facilities with high precision using master meter method

 

 

TU Bo1, LI Xiaoming1, YE Lingyun2, SONG Kaichen2

 

(1. College of Mechanical Engineering, Zhejiang SciTech University, Hangzhou 310018, China;

 

2. College of Biomedical Engineering & Instrumentation, Zhejiang University, Hangzhou 310058, China)

 

 

Abstract: In order to solve the problem of the standard facilities with high expanded uncertainty which affected by the linearity of the standard flowmeter itself, the improvement of flow meter accuracy by compressing measurement range was investigated after the analysis of the effect of the accuracy of vortex flowmeter, the relationship between the linearity of the standard flowmeters and the expanded uncertainty of the standard facilities was established. A method was presented to reduce the expanded uncertainty of the standard facilities. The expanded uncertainty of the standard facilities were evaluated on the theoretical calculation, the efficacy were tested. The experimental results show that we can reduce the expanded uncertainty of the standard facilities by compressing measurement range and combination optimization.

 

Key words: vortex flow meter; measurement; linearity; expanded uncertainty