Why do mass flowmeters need temperature and pressure compensation?1

Why should the mass flowmeter perform temperature and pressure compensation? The mass flowmeter is an advanced intelligent precision mass flow measurement instrument. The flowmeter can be directly used to measure the mass flow rate and total amount of the medium in the pipeline, the volume flow rate and the total amount, the density of the medium, the temperature, the concentration of the solution, and the respective concentrations of the two liquids that are more evenly mixed. Mass flowmeters can play a very effective role in the following fields of batching and batch measurement of various feed materials, measurement and control of material flow in the process, rapid and variable density measurement, and product quality monitoring. The mass flowmeter is mainly used to measure the mass flow, total amount, and density of the medium. At the same time, it can also measure the volume flow, total amount, medium temperature, water content, alcohol content of alcohol, and the concentration of two liquids that are mixed evenly. , The ratio of raw materials in the process, etc. The vast majority of commonly used flowmeters can only directly measure the volume of the fluid, but not the quality. If we only measure the volume of the fluid under the current working condition, the instrument can directly display it. However, if the flowmeter is displayed as fluid quality, the data of fluid quality is obtained by multiplying the product of the instant sampled fluid volume parameter and the density parameter (mass = density X volume) instead of directly measuring the quality of the fluid . As a flow meter, the data it measures must be accurate. If you want to measure the quality of a fluid, it involves a problem: whether the density of the fluid is constant. If the density of the fluid is consistent, then just fix the density parameters of the fluid on the instrument, but what should be done when the density of the fluid is constantly changing? At this time, it is necessary to constantly adjust the fluid according to the current working conditions of the fluid. Adjust the density parameter of the fluid. In flow measurement, the method of adjusting the fluid density parameter according to the fluid working condition is density compensation. The so-called pressure compensation is actually to adjust the value of the fluid density according to the pressure parameters in the fluid working conditions. If the density parameter is adjusted only according to one of the two parameters of temperature or pressure in the fluid working condition in the measurement, it is called temperature compensation or pressure compensation, but if the density parameter is adjusted according to the temperature and pressure parameters at the same time It's called temperature and pressure compensation.

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