Dandong flowmeter | How to calibrate flowmeter

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1. How to read the reading of a natural gas flow meter? The reading of a natural gas flow meter mainly depends on the numbers and units displayed on the LCD screen. For a mechanical dial, it is necessary to observe the position of the pointer and the corresponding value of the scale. 1. Reading method of electronic flowmeter • Direct reading: LCD screen displays cumulative usage (unit m ³) and instantaneous flow (unit m ³/h) - common models such as Gold Card Intelligent G6 series, display divided into two rows: upward display cumulative measurement, downward display real-time flow - instruments with valve control function will alternately display the remaining amount (to be used in conjunction with IC card) Reading method for mechanical flowmeter - observe the scale indicated by the red pointer and calculate according to the multiple of x 0.1/x 1/x 10 marked on the dial - Example: If the x 1 pointer points to 3 and the x 10 pointer points to 5, the current reading is 53m ³ - Lao Yuan collapse type membrane gas meter (such as Dandong Sikai TM series) uses a roller counter to directly read the black number 3 for deviation Precautions - Industrial and commercial turbine flow meters should pay attention to pressure compensation parameters (such as Tianxin Instrument TDS series standard condition flow rate=operating condition flow rate x pressure correction factor) - Ultrasonic flow meters with temperature compensation (such as Emerson Daniel series) need to confirm whether the display interface is switched to standard condition flow rate - Mechanical meters need to take photos on the 1st of each month to avoid disputes Exception handling - If the E-01 code appears on the electronic meter, it indicates that the battery is under voltage and needs to be replaced by contacting the gas company. If the red pointer of the mechanical meter does not rotate, it may indicate that there is no airflow passing through the pipeline. If there is suspicion of inaccurate measurement, the gas company can be requested to use a bell type calibration device for on-site inspection. 2. How to calibrate the flowmeter. Method and process of flowmeter calibration: 1. Clarify the purpose of calibration, correct deficiencies and prepare items. Flowmeter calibration is to ensure the accuracy and reliability of its measurement results. Before calibration, it is necessary to prepare corresponding standard tools and equipment, such as standard flow meters, calibration devices, etc. At the same time, it is necessary to clarify the requirements for the calibration environment, such as the control of parameters such as temperature, humidity, and pressure. In addition, familiarizing oneself with the characteristics and usage instructions of the flowmeter is also a necessary preparation before calibration.

2. Calibration Process 1. Flow standard device calibration method: This is the most commonly used method.

. Compare and measure the flow meter to be calibrated with a standard flow meter, and evaluate the accuracy of the flow meter by comparing the measurement results of the two. This method requires ensuring the accuracy of the standard flowmeter itself. 2. Physical calibration method: In some cases, actual fluid media can be used for calibration. This method is more practical and intuitive, but it requires ensuring that the characteristics of the calibration medium are consistent with the medium used by the flowmeter to ensure the accuracy of the calibration r

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