Evaluation steps for display error of gas metal tube rotameter gauge

Abstract: The information on the evaluation steps of the display error of the gas metal tube float flow meter is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Metal tube float flowmeter is a variable area flow meter based on float position measurement. It has the characteristics of simple structure, intuitive, small pressure loss and convenient maintenance. The gas metal rotameter is one of the most commonly used flowmeters in industry and laboratories. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the evaluation steps of the display error of the gas metal tube float flowmeter. Metal tube float flowmeter is a variable area flow meter based on float position measurement. It has the characteristics of simple structure, intuitive, small pressure loss and convenient maintenance. Gas metal float flowmeter is one of the most commonly used flowmeters in industry and laboratories. With the promulgation and implementation of the new regulation jjg257-2011 'Metal tube float flowmeter' and more and more steel and chemical enterprises The flowmeter is sent for inspection, and our company believes that it is necessary to evaluate the measurement error of the indication error of the gas metal float flowmeter separately. The specific steps are as follows: 1. Measurement basis of metal tube rotameter: According to the verification regulations jjg257-2011 'Metal tube rotameter'. According to the verification regulations, the verification of the indication error of the gas metal tube float flowmeter adopts the standard table method on the gas flow standard device of the sonic nozzle. 2. Environmental conditions of metal tube float flowmeter: temperature requirement: (5～35)℃; humidity requirement: atmospheric relative humidity is (45%～75%)rh; atmospheric pressure requirement: (86～106)kpa. 3. Measurement standard of metal tube float flowmeter: standard device for gas flow rate of sonic nozzle, working range DN (15 ~ 200) mm diameter. Sonic (speed nozzle gas flow standard device is mainly composed of annular water vacuum pump, pressure stabilizer tank, calibration table, sonic nozzle, timing counter, upper computer, etc.) Fourth, metal tube float flowmeter Measured object: gas metal tube float flow The accuracy level is 2.5. 5. Measurement process of metal tube rotameter: Under the specified environmental conditions, the verification of jjg257-2011 'Metal tube rotameter' takes air as the medium and uses the standard table method to measure. Calculate the indication error ei=(qvs-qn)/qmax by comparing the flow rate qvs measured by the detected flowmeter and the standard volume flow rate qn measured by the standard flow device at this point.×100%. Sixth, the use of the evaluation results of the metal tube float flowmeter: in the case of meeting the above conditions, theφ25mm gas metal rotor flowmeter, measuring range (2.5～25)m3/h, generally can directly use this uncertainty evaluation result; for other flowmeters, this uncertainty can be used according to the type of flowmeter and measuring range The degree of evaluation method gives the corresponding evaluation results. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Assessment steps for display error of gas metal tube float flow meter'

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