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Interference factors in mass flow meter measurement and methods of processing - Focus on microfluidic control technology

1, the impact of vibration on the accuracy of the mass flow meter.
Treatment method: Avoid vibration interference. If it can not be avoided, isolation measures should be taken to isolate the flowmeter from the sources of vibration interference.
2. The influence of electromagnetic interference on the accuracy of the mass flowmeter.
Treatment method: The mass flowmeter should be installed away from large transformers, motors and other devices that generate large magnetic fields.
3, the impact of installation stress on the accuracy of the mass flowmeter.
Treatment methods: a. Flowmeter installation should strictly abide by the installation specification. b. After the flow meter is installed, use the communicator or the transmitter interface to call up the “zeroing menu” and record the factory default zero value. After zeroing, observe the zero value at this time. An order of magnitude, if the difference between the two values is large, it means that the installation stress is too great and should be reinstalled.
4. The influence of the gas contained in the oil on the accuracy of the mass flowmeter.
Treatment methods: a. Improve the working conditions of the oil product, so that the air bubbles contained in the oil product are distributed as evenly as possible to meet the requirements for the normal metering of the flowmeter; b. The mass flowmeter is installed with an air eliminator upstream to minimize the gas-liquid mixing phenomenon; c. Installed in strict accordance with the installation specifications of the mass flow meter: measuring oil media flow tube down
5, the impact of temperature changes on the accuracy of the mass flowmeter.
Processing method: a. The effect of temperature on the metal elasticity of the flow meter measuring tube can be solved by setting the temperature correction coefficient; b. The influence of temperature on the stability of the zero point. In practical applications, the mass flow meter is required under the operating temperature condition. Field zeroing is performed to minimize the impact.
6, the impact of pressure changes on the accuracy of the mass flow meter.
Treatment method: For oil products with large changes in transmission pressure and trade delivery, a pressure transmitter must be installed downstream of the flowmeter to perform pressure compensation in real time by means of software.
7. The influence of oil density and viscosity on the accuracy of the mass flowmeter.
Treatment method: The flowmeter should be used on oils with little difference in measurement or density, and the on-line real-flow calibration must be adopted for the mass flowmeter used for the delivery of bulk oils and equipped with on-line density meter.
8. The effect of measuring tube damage or corrosion on the accuracy of the mass flowmeter.
Treatment methods: a. The front of the flowmeter is equipped with a corresponding filter to prevent foreign matter from entering; b. Use a special material flowmeter.

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