Precautions for installing open channel flow meters

Abstract: The information on the matters needing attention when installing open channel flowmeters is provided by excellent flowmeter and flowmeter manufacturers. 1. Accuracy class and function Select the instrument accuracy class according to the measurement requirements and application occasions, so as to be economical and cost-effective. For example, in the case of trade settlement, product handover and energy measurement, a higher precision level should be selected, such as level 1.0, level 0.5, or higher. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the article details of the matters needing attention when installing open channel flowmeters. 1. Accuracy class and function Select the instrument accuracy class according to the measurement requirements and application occasions, so as to be economical and cost-effective. For example, in the case of trade settlement, product handover and energy measurement, a higher accuracy level should be selected, such as 1.0, 0.5, or higher; for process control, different accuracy levels should be selected according to control requirements; some only It is to detect the process flow, without precise control and measurement, you can choose a slightly lower accuracy level, such as 1.5, 2.5, or even 4.0, then you can choose a low-cost plug-in open channel flowmeter. 2. Measuring medium flow rate, instrument range and diameter When measuring general medium, the full-scale flow rate of the open channel flowmeter can be selected within the range of 0.5-12m/s of the measured medium flow rate, and the range is relatively wide. The specification (diameter) of the selected instrument is not necessarily the same as that of the process pipeline. It should be determined according to whether the measurement flow range is within the range of the flow rate, that is, when the flow rate of the pipeline is too low to meet the requirements of the flow meter or the measurement accuracy cannot be guaranteed at this flow rate, It is necessary to reduce the diameter of the instrument to increase the flow rate in the pipe and obtain satisfactory measurement results. 3. The fluid characteristics mainly refer to the pressure, temperature, density, viscosity, compressibility, etc. of the gas. Since the volume of the gas changes with the temperature and pressure, it should be considered whether to compensate and correct. 4. Instrument performance refers to the accuracy, repeatability, linearity, turndown ratio, pressure loss, initial flow, output signal and response time of the instrument. When selecting a flowmeter, the above indicators should be carefully analyzed and compared, and the selection can meet the flow rate of the measuring medium. required instrumentation. 5. Installation conditions refer to the gas flow direction, pipeline direction, upstream and downstream straight pipeline length, pipe diameter, spatial position and pipe fittings, etc., which will affect the accurate operation, maintenance and service life of the gas flow meter. 6. Economic factors refer to the purchase cost, installation cost, maintenance cost, verification cost and spare parts, etc., which are also affected by the performance, reliability and life of the gas flow meter. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Precautions for installation of open channel flow meter'

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