You know several common influencing factors of gas mass flowmeter

The gas mass flowmeter is designed and produced based on the principle of thermal diffusion. The product is widely used in steel plants, coking plants, petroleum, chemical, thermal, medical, thermal power plants, environmental protection and other industries. The gas mass flowmeter is a real direct mass flowmeter, and the user does not need to compensate the pressure and temperature. The instrument has no moving parts, small pressure loss, wide range ratio, high precision, high reliability, simple installation and convenient operation. The gas mass flowmeter measurement system adopts the Coriolis principle, which can not only directly measure and display the temperature and density of the measured medium, but also display the mass flow rate of the measured medium, which is related to other parameters of the measured medium such as density, temperature, etc. , pressure, viscosity and flow state are independent. Due to the integrated design and continuous measurement, its structure is simple and its reliability is high, and it can obtain a signal proportional to the mass flow rate and linear without special calculation. The gas mass flowmeter can continuously measure the mass flow of various fluids when the liquid is mixed with insoluble gas, solid-particle mixed fluid, and high-viscosity fluid. There are no inserts in the tube, no interference to the flow state of the measured fluid, and easy maintenance. There are many factors that affect the flowmeter. Briefly talk about the common influencing factors: (1) Pressure The pressure of the gas measured by the CMF used in the gas dispenser is not lower than 20MPa, and the pressure is far greater than the atmospheric pressure. The high pressure changes the internal stress of the vibrating tube and increases the equivalent stiffness of the elastic tube, thereby increasing the vibration frequency of the vibrating tube and reducing the phase difference between the two tubes; when the gas flows through the vibrating tube, there is a pressure drop, which makes the vibrating tube The force is asymmetrical, which also affects the phase difference. (2) Temperature The working temperature of the CMF used for the dispenser is much lower than the room temperature, and the influence of temperature must be considered; the change of medium temperature or ambient temperature will change the Young's modulus of the measuring vibrating tube and affect the structure of zero drift and other factors. (3) Flow rate Compressed gas has low density and fast flow rate, and its influence cannot be ignored. Ideally, as the flow rate increases, the vibration frequency of the vibrating tube decreases. Generally, the change of fluid density is small, and it can be considered that the flow rate is proportional to the mass flow rate of the fluid. Therefore, the compensation of flow rate can be converted into a nonlinear factor of flow rate change for compensation.

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