Calibration and Verification of MEMS Mass Flow Meters for Custody Transfer |
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| Wenhong Deng, Sugang Jiang, Rui Liu, Liji Huang, Pujun Zhao, Li Lei, Kaiyou Jin |
- Abstract:
- Thermal mass flow meters are commonly of full scale accuracy and not considered for applications where custody transfer is required. Recent advancement of MEMS mass flow technology in city natural gas metering has demanded a better calibration and verification procedure so that the custody transfer can be justified with regard to the traditional thermal mass flow meter technology. The thermal mass flow sensor could be impacted by the humidity, gas composition and temperature. Calibrations with one standard may often be not applicable to the others if each of the factors is not fully accounted; even the meter itself has been well designed and immune to the variables. In this paper, we will discuss the calibration procedures and measurement uncertainties of the MEMS mass flow meters. The results indicated that with the MEMS meter designed for processing the variables, the MEMS thermal mass flow meters either with calorimetric and/or energy dispersion principle can be applied for custody transfer with a generally acceptable accuracy of ±1.5% or better.
- Keywords:
- MEMS flow meter, Custody transfer, Calibration methodology
- Download:
- IMEKO-TC9-2010-066.pdf
- DOI:
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