Flow meter non full tube measurement

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1. How about non full tube flow meters? Non full tube flow meters perform well in adapting to complex flow conditions, ensuring measurement accuracy and stability, but product quality screening should be emphasized. 1. Analysis of core advantages and adaptability: When dealing with non full pipe fluids, it can be compatible with different fluid properties, pipe shapes, and installation conditions, and has high flexibility in applicable scenarios. Measurement accuracy: For example, the Qingtiantek CQTLD/F model adopts multi electrode Qinzhi sensing technology, which automatically adjusts the measurement mode in response to liquid level changes, ensuring an accuracy level of ± 0.5%. Stability of operation: Long term use can still maintain initial accuracy, reducing calibration frequency and usage costs. Maintenance convenience: Modular design simplifies daily maintenance steps and reduces downtime and maintenance costs. Intelligent functions: real-time liquid level recognition, self diagnostic warning (such as electrode scaling prompt) and other technologies significantly improve equipment management efficiency. Typical application areas: industrial scenarios such as chemical reaction liquid level monitoring, oil pipeline leakage warning, and pharmaceutical process ratio control are widely used. Environmental monitoring: Instantaneous flow measurement of sewage pipelines and continuous monitoring systems for exhaust emissions are often equipped with such equipment. Energy Xiangjin Transportation: Plays a core metering role in the dynamic monitoring of oil and gas transportation flow and energy efficiency optimization of thermal pipeline networks. 3. Key points for purchasing decisions: There are significant differences in market products, and three key indicators need to be focused on: corrosion resistance of sensor materials (such as whether Hastelloy alloy is used), iterative ability of calibration algorithms (such as the dynamic liquid level compensation beam base method version), and integrity of intelligent diagnostic functions (such as whether electrode aging can be predicted). It is recommended to prioritize products that have long-term operational stability certification from third-party authoritative institutions.

2. What is the reason for the reverse calculation of the electromagnetic flowmeter when returning water?

The main reason for the reverse calculation of the electromagnetic flowmeter when returning water is improper installation position or the presence of bubbles/non full pipe state in the fluid, which leads to abnormal measurement electrode signals.

1. Core Cause Analysis 1 Installation position issue: When installing an electromagnetic flowmeter on the return water pipeline, if it is installed near the pump outlet or at a high point in the pipeline where gas is easily collected, a large number of bubbles will be mixed in the reflux fluid. When bubbles pass through electrodes, they cut magnetic lines and generate reverse induced potential. The processor misjudges it as reverse flow, causing the counting to reverse. When the fluid state is abnormal and the tube is not full (there is an air layer inside the tube), the contact between the electrode and the fluid is unstable, resulting in a noise signal similar to reverse flow. According to the requirements of GB/T 18659-2018 "Electromagnetic Flowmeters", the measurement must ensure a full tube state and the bubble content must be less than 1

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