What are the factors that affect the accuracy of mass flowmeters?

What are the factors that affect the accuracy of mass flowmeters? In oil transfer, mass flowmeters are often used. Although the measurement of mass flowmeters is relatively accurate and reliable, there will be some abnormal phenomena in practical applications, which will bring unnecessary Therefore, we need to analyze these abnormal phenomena and economically reduce the influence of unfavorable factors. So what are the factors that affect the accuracy of mass flowmeters? Influence of the mass flowmeter When the mass flowmeter is working normally, the measuring tube is in a vibrating state and is very sensitive to external vibration. If there are other vibration sources in the installation area of ​​the flowmeter, it will also affect the vibration frequency of the mass flowmeter and cause measurement errors. The way is to avoid vibration interference. If it is unavoidable, isolate the flowmeter from the vibration interference source. The second is the influence of electromagnetic interference on the accuracy of the mass flowmeter. Since the sensor vibrates the measuring tube through the excitation coil, if the flowmeter works There is relatively large magnetic field interference near the area, which will also affect the measurement results. The third is the influence of installation stress on the accuracy of the mass flowmeter. During the installation of the mass flowmeter, if the sensor flange of the flowmeter is connected to the central axis of the pipeline If it is not aligned, the stresses generated by the pipe will also be misaligned. The gas mass flow sensor is based on the heat transfer principle that the heat taken away by the gas flowing through the sensor is proportional to its output voltage. The pressure sensor is that the gas pressure is proportional to the output voltage, that is, the gas mass flow and gas pressure are simultaneously converted into analog signals for output. The function of Zhonglong mass flowmeter mass digital display integrator is to convert the analog electrical signal output by the gas mass flow sensor into a digital signal through the A/D inside the single-chip microcomputer, and then convert the mass flow rate of the gas into a corresponding The gas volume flow rate under the standard state or the mass flow rate under the standard state are calculated by data processing and operation to calculate the real-time flow rate and the cumulative flow rate respectively, and send them to the four-digit and eight-digit digital tubes for display. In addition, the single-chip microcomputer can store various calibration data, conversion coefficients, artificially set upper and lower limits of real-time flow, and accumulated flow data in the EEPROM of the single-chip microcomputer for storage. It can be automatically saved after power failure. , these data information can be restored automatically.

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