The flow output of the electromagnetic flowmeter meter does not match the actual zero point shaking and instability

Abstract: The flow output of the electromagnetic flowmeter meter does not match the actual zero-point shaking and unstable information provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Several electromagnetic flowmeters are used in the gasification unit. The faults encountered during the commissioning of the gasification unit are as follows: 1. The flow signal suddenly drops or there is no indication that the process operator reports that the grey water flow rate from the circulating grey water cooler is The meter flow value drops suddenly. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article about the flow output of the electromagnetic flowmeter that does not match the actual zero-point shaking and instability. A number of electromagnetic flowmeters are used in the gasification unit. The faults encountered during the commissioning of the gasification unit are as follows: 1. The flow signal suddenly drops or there is no indication that the process operator reflects that the flow of grey water from the circulating grey water cooler The flow value of the meter suddenly dropped. According to the experience of instrument maintenance for many years, it is judged that the main reason for this situation is that the insulation between the electrodes is deteriorated or short-circuited, causing the signal to not be sent out. After careful and careful inspection, it was found that the signal socket was corroded, so it was cleaned and dried with clean water, and it was normal after reinstallation. Of course, in addition to the above reasons, there may also be dirt deposits on the inner wall of the measuring catheter, and the lining of the measuring catheter is damaged. The specific reasons should be dealt with in detail. 2. When the output signal swaying, the instrument personnel found that the output signal of the electromagnetic flowmeter swayed violently. Check to confirm that the measured fluid has no fluctuation or pulsation, and the pipeline is full of liquid. After careful inspection, the electromagnetic flowmeter itself has no It was found that an equipment maintenance personnel was welding a joint not far away, and it was determined that it was caused by electromagnetic interference when the electric welding machine was working. After the electromagnetic interference was far away, the flowmeter indicated normal. 3. When the zero-point instability process stops, the zero-point of the dense mortar flow meter is unstable. The inspection finds that there is dirt deposition in the pipeline measured by the meter, which adheres to the inner wall of the measuring pipe, resulting in the zero-point change of the flowmeter. After the dirt and dirt near the electrode, it was found that the zero point still changed a bit. After re-calibrating the zero point with bt200, the meter showed normal. Of course, in addition to the above analysis, the reasons for the instability of the zero point may be the following four reasons: the pipeline is not filled with liquid or there are air bubbles in the liquid; whether there is leakage in the pipeline; whether there is external electromagnetic interference; 4. The measured value and the actual The value does not match. Under the condition of ensuring that the liquid in the measured pipeline is full of the sensor and is still, after re-adjusting the zero point of the meter with bt200, there is still an error between the measured value and the actual value. After careful inspection, it is found that the range setting of the converter is wrong. , after resetting the correct range that conforms to the table, the indication is normal. The reasons for the discrepancy may include the following aspects: the sensor is not installed properly, the pipe is not full, or the measured liquid contains air bubbles. Such faults are mainly caused by the pipe network. Poor engineering design, as well as imperfect related equipment; the insulation capacity of the signal cable is reduced. First, check with the main control room to confirm whether the cable is connected correctly, and then check whether the terminal or the joint of the cable is damp, which will reduce the insulation capacity of the cable; the upstream flow of the sensor does not meet the requirements. The upstream flow of the sensor is often limited by the installation space and does not meet the specified requirements. For example, there is no long enough straight pipe section close to the baffle that generates turbulence. These will introduce factors that affect the measurement accuracy. There is a sediment layer or pipe wall on the inner wall of the measurement pipe. is worn, thereby changing the flow area and affecting the measured value; the resistance between the sensor electrodes changes or the electrode insulation decreases. This fault is often caused by the intrusion of rainwater on the terminal to make it damp. Insulation can be restored by removing moisture. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The flow output of the electromagnetic flow meter does not match the actual zero shaking and instability'
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