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1. Scale conversion of remote type float flowmeter
The scale conversion of remote type float flowmeter is essentially based on the density of the fluid medium and the working conditions, converting the flow value corresponding to the float height h from one fluid medium or working condition to another.
1. Basic Principle of Scale Conversion The scale conversion of a remote type float flowmeter is based on the working principle of the float flowmeter, which is the relationship between the buoyancy of the float in the fluid and the fluid flow rate.
. For different fluid media or operating conditions, due to different parameters such as fluid density, temperature, pressure, etc., the flow rate value corresponding to the float at the same height h will also be different. Therefore, it is necessary to perform scale conversion to ensure that the reading of the flowmeter accurately reflects the actual flow rate.2. Scale Conversion Method Standard State Scale Method: Select water or air under standard conditions (temperature tn=20 ℃, pressure pn=101325Pa) as the scale medium.
. According to the calibration data of the float flowmeter under standard conditions, calibrate the float height h with the corresponding flow rate value. When used to measure other fluids, conversion is required based on parameters such as density, temperature, and pressure of the fluid. Working fluid calibration method: directly selecting working fluid (liquid or gas) as the calibration medium. Perform gear calibration under the actual working conditions of the working fluid, and calibrate the float height h with the corresponding flow rate value. This method is suitable for long-term measurement of fixed fluids and stable
III. Scale Conversion of Remote Transmission Signals For remote type float flowmeters, the remote transmission signal (such as 4-20mA current signal) also needs to undergo the same scale conversion.
. This means that when the float height h changes, the remote signal should be able to accurately reflect the actual flow rate changes. Therefore, in the process of scale conversion, it is necessary to ensure that the output of the remote signal is consistent with the float height h and the corresponding flow rate value.4. Precautions: When performing scale conversion, the physical properties of the fluid medium (such as density, viscosity, etc.) and operating conditions (such as temperature, pressure, etc.) should be fully considered for their impact on the flowmeter reading.
. Scale conversion should be carried out by professionals to ensure the accuracy and reliability of the conversion results. For flow meters that are used for a long time, regular calibration and maintenance should be carried out to ensure their measurement accuracy and stability.Fifth, Conclusion: Scale conversion of remote type float flowmeter is an important link to ensure accurate measurement of flow rate by the flowmeter.
. By selecting appropriate calibration meth
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