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Turbine flowmeters are widely used, offer good cost-performance, and are easy to maintain and operate. As long as they are properly calibrated at the factory and the operating conditions on site meet the required standards, their performance is quite satisfactory. Next, the technical editor from HETONGSHUO Flow Meters will summarize the calibration of turbine flow meters and analyze the reasons for the decline in accuracy during use, for everyone’s reference and sharing. Turbine flowmeters are quite sensitive to the operating conditions at the installation site, and users should try their best to meet those requirements in order to maintain the accuracy as specified at the time of manufacture. When the temperature and pressure of the fluid medium differ significantly from the reference conditions, the volume change of the sensor housing can be calculated based on the material of the sensor and the temperature and pressure, thereby correcting the instrument reading. When the viscosity of the fluid medium under operation differs significantly from that of the calibration fluid, corrections should be made using the viscosity correction curve provided by our company. Turbine flowmeters have certain requirements regarding the length of the straight pipe sections upstream and downstream of them, and these requirements should be met, especially when the user demands high precision. The gauge displays the volumetric flow rate under the operating conditions of the medium; to determine the standard volumetric flow rate or mass flow rate, density compensation is required. The editor has summarized the technical aspects related to turbine flowmeters. A decrease in accuracy of these flowmeters during use can be attributed to the following reasons: 1. The medium usually contains some impurities, which cause wear on the bearings and shafts, leading to an increase in the gap between them. This disrupts the dynamic balance of the moving parts, resulting in a decrease in rotational speed. Additionally, dirt that gets into this gap increases the mechanical resistance, further reducing the rotational speed. All these reasons cause the instrument reading to decrease, resulting in a negative error, which is unfavorable for the fluid supplier. 2. Changes in fluid temperature and pressure can cause the air contained within the liquid in the pipeline to escape, or the pressure inside the pipeline may be lower than the saturated vapor pressure of the fluid, resulting in part of the liquid turning into steam. Additionally, negative pressure in the system can draw external gases into the pipeline; these gases move along with the fluid being measured, causing the instrument readings to increase and leading to positive errors, which is detrimental to those who rely on that fluid. 3. Fibrous or viscous impurities in the fluid attach to the rotating parts of the flow meter, increasing the rotational resistance and resulting in a decrease in the instrument’s reading, leading to negative errors – which is detrimental to the fluid supplier. 4. The working environment can be quite harsh, with factors such as electromagnetic interference, dust, high temperatures, vibrations, and humidity. These conditions may cause the sensor of the turbine flowmeter to malfunction or stop functioning properly, resulting in errors in the readings provided by the turbine flowmeter. The errors can be positive or negative; they may not be noticeable, or the flowmeter may completely cease to work. Regarding the aforementioned phenomenon, when it is severe, issues can be identified by comparing the working status of the processes, making it easier to take appropriate measures. However, in the early stages of the problem, no special measures can be taken to detect it. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content! http://www.yb1518.com/UploadFiles/20101111113351160.jpg