How to Improve the Practical Accuracy of Mass Flow Meters

Abstract: How to improve the practical accuracy of mass flow meter is provided by excellent flow meter and flow meter manufacturers. With the continuous acceleration of industrial development, the requirements for flow meters are also getting higher and higher. Tianchen Borui mass flowmeter is a high-standard mass flowmeter, which can measure the mass, temperature and density of the fluid, and can also calculate the volume of the flow. in the process of practical application. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details on how to improve the practical accuracy of mass flowmeters. With the continuous acceleration of industrial development, the requirements for flow meters are also getting higher and higher. Tianchen Borui mass flowmeter is a high-standard mass flowmeter, which can measure the mass, temperature and density of the fluid, and can also calculate the volume of the flow. In the process of practical application, the accuracy of the mass flow meter is extremely high. Therefore, in the practical process, the accuracy of the mass flow should be improved. Let’s start with the principle of mass flow meters. 1. Working principle of Coriolis mass flowmeter Tianchen Borui mass flowmeter uses the phase difference of the vibration frequency of the two halves of the measuring tube (also called the vibrating tube) to be proportional to the mass flow to measure the mass flow. Density is obtained from the functional relationship between the density of the medium being measured in the tube. Coriolis mass flow meters can also be derived from the two basic parameters mass flow qm and densityρThe volume flow qv is obtained. 2. Factors Affecting the Practical Accuracy of Coriolis Mass Flow Meters Coriolis mass flow meters are electromagnetically driven mechanical vibration type flow measuring instruments. Impact. The flow measurement tube (also called flow vibration tube) installed in the pipeline will be affected by the mechanical vibration, mechanical stress, and mechanical torque of the factory pipeline. In addition, the error characteristics of the Coriolis mass flowmeter itself show“loudspeaker”, rather than presenting a flat line with different flows. In view of the above reasons, the measures to improve the practical accuracy of the Coriolis mass flowmeter are: 1) According to the actual process parameters of the Coriolis mass flowmeter, carry out“Personalized Standards”, so as to realize that the actual measurement error (difference from the standard value) of the Coriolis mass flowmeter tends to zero within a certain range of the actual use flow point; 2) The installation of the Coriolis mass flowmeter is well , reduce or eliminate the influence of mechanical stress, mechanical torsion and mechanical vibration on the use of the flowmeter; 3) Consider the influence of process pressure, temperature, etc. on the measurement accuracy of the Coriolis mass flowmeter; 4) Put a good Coriolis The use of mass flowmeters is beneficial. 3. Scheme 3.1 Implementation of Realizing the Practical Accuracy of Coriolis Mass Flow Meters“Personalized Standards”scheme to realize the error formula of flow measurement close to zero error Coriolis mass flowmeter: In the formula: E allows—The allowable error of the flowmeter; E0—Accuracy class of the flowmeter; qz—Zero drift value of the flowmeter; q measurement—The current measurement value of the flowmeter. It can be seen that the error characteristic curve of the Coriolis mass flowmeter is shown in Figure 1. Figure 1 Error characteristic curve of Coriolis mass flowmeter For the error characteristic of Coriolis mass flowmeter, combined with the actual use process, the Coriolis mass flowmeter only works in a relatively small flow range, so it can be Try to make the flowmeter within a certain range of the actual use flow point (usually control this range as the actual use flow point±20%) of the measurement error tends to zero, for this reason, the liquid flow standard device can be used to set the flow verification point according to the national mass flow meter verification regulations (JJG1038-2008), and the actual flow point of the actual use can be used.±20% range of point calibration (at least three points: 80% Q actual, Q actual, 120% Q actual), to achieve the mass flow meter“Personalized Standards”, its main purpose is not only to make its standard results meet the requirements of the mass flow meter verification regulations, but also to make the mass flow meter in the actual use flow point±In the range of 20%, the measurement error of the three points of the sampling standard tends to zero. In particular, the measurement error of the actual flow point (the difference between the indicated value of the flowmeter and the standard value of the standard device) is zero. Only in this way ,Mass flowmeter“Personalized Standards”work is completely completed. According to the above assumptions, a mass flow meter numbered: 14005601 is carried out.“Personalized Standards”, learned from the factory that the actual flow point of the flowmeter is: 21.7t/h, and the maximum flow rate is: 43.6t/h. According to the requirements of the National Mass Flowmeter Verification Regulations (JJG1038-2008), it is verified and verified. As a result, the indication error at 21.7t/h is: -0.153%. Judging from the above data, the measurement accuracy of the mass flowmeter is not very high at the actual use point of 21.7t/h. Therefore, according to the above data, the flowmeter is adjusted, and its flow calibration coefficient is increased by 0.153%, and then According to this“Personalized Standards”The method is used to standardize the flowmeter, and the indication error of the re-standard result at 21.7t/h is: 0.002%. Through the above practice, the effective implementation of the Coriolis mass flowmeter“Personalized Standards”, so that the flow measurement is close to zero error.

Beijing Sincerity Automatic Equipment Co., Ltd is trying to institute social good changes this relationship because it averts a firm's resources from its core task of increasing profits.

Beijing Sincerity Automatic Equipment Co., Ltd didn’t receive any negative feedback from our customers before, which proves that customers have faith in us.

Beijing Sincerity Automatic Equipment Co., Ltd is a initial company that supports expertise in searching marketing solutions.