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Factors affecting mass flowmeter measurement and solutions

Factors affecting mass flowmeter measurement and solutions
The mass flow meter directly measures the mass flow rate of the medium passing through the flow meter, and also measures the density of the medium and indirectly measures the temperature of the medium. To accurately measure the data, there is no influential factor, but when using the flowmeter, some factors cannot be avoided. Simply put, some factors affect the measurement and solution of the mass flowmeter.
1. The effect of vibration on the accuracy of the mass flow meter. Treatment: Avoid vibration interference. If it is unavoidable, isolation measures should be taken to isolate the flowmeter from sources of vibration interference.
2. The effect 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 equipment that generate large magnetic fields.
3. The influence of installation stress on the accuracy of the mass flowmeter. Treatment method: a. The flowmeter should be installed in strict accordance with the installation specifications. b. After the flowmeter is installed, use the hand-held device or the transmitter interface to call up the “zero adjustment menu” and record the factory zero preset value. After the zero adjustment is completed, observe the zero value at this time. The front and back values must be guaranteed. An order of magnitude, if the difference between the two values is large, the installation stress is too large and should be reinstalled.
4. The influence of gas contained in the oil on the accuracy of the mass flow meter. Treatment method: a. Improve the working condition of the oil, so that the bubbles contained therein are distributed as evenly as possible to meet the requirements of normal metering of the flow meter; b. Install the gas eliminator upstream of the mass flow meter to minimize the phenomenon of gas-liquid mixing; c. Strictly installed according to the mass flowmeter installation specification: measuring the oil medium flow tube installed downwards
5. The effect of temperature changes on the accuracy of the mass flow meter. Treatment method: a. The influence of temperature on the metal elasticity of the flowmeter measuring tube can be solved by setting the temperature correction coefficient; b. The influence of temperature on the zero stability, in practical applications, the mass flowmeter is required under operating temperature conditions. Perform on-site zeroing to minimize impact.
6. The effect of pressure changes on the accuracy of the mass flow meter. Treatment method: For the oil with large change in transmission pressure and trade transfer, pressure transmitter should be installed downstream of the flowmeter to perform pressure compensation in real time in software mode.
7. The effect of oil density and viscosity on the accuracy of the mass flow meter. Treatment method: The flowmeter should be used to measure oil with little difference in density or density. For mass flowmeters used for bulk oil delivery, online flow calibration must be used and equipped with online density meter.
8. The effect of measuring tube damage or corrosion on the accuracy of the mass flow meter. Treatment method: a. Install the corresponding filter on the front end of the flowmeter to prevent foreign matter from entering; b. Use a special material flowmeter.

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