Medical oxygen flowmeter calibration
Abstract
The article solves the problem of calibrating an oxygen flowmeter for subsequent accurate and reliable accounting of medical oxygen in medical institutions, where oxygen is transported through pipelines in a gaseous state. The feasibility of using thermal mass flow converters is described, which provide high sensitivity, a wide measurement range and the ability to determine the flow rate under standard conditions without additional pressure and temperature sensors. A method for calibrating a flowmeter on a specialized stand is proposed, which allows increasing the measurement accuracy to 2%. The article describes in detail the construction of a mathematical model of the oxygen compressibility coefficient. An algorithm for constructing and implementing a corrective function of a flowmeter that takes into account the deviation of its readings from real values is also given. The effectiveness of the proposed approach is demonstrated, which allows integrating the obtained results into the microprocessor system of the flow meter and achieving high accuracy in measuring and calculating the consumed oxygen under standard conditions.
References
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