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An insert-type electromagnetic flowmeter uses Faraday’s law of electromagnetic induction to measure the flow rate of a medium. Insertion-type electromagnetic flowmeters are primarily used to measure the volumetric flow rate of conductive liquids and slurries in closed pipelines. Including strongly corrosive liquids such as acids, bases, and salts. Insertion-type electromagnetic flowmeters are widely used in industries such as petroleum, chemicals, metallurgy, textiles, food, pharmaceuticals, and papermaking, as well as in fields like environmental protection, municipal management, and water conservancy construction. This article mainly introduces several troubleshooting methods for plug-in electromagnetic flowmeters. I. No current is outputted after the power is turned on. Cause of the fault: The power supply is not connected ； Maintenance methods: 1. Check whether the fuse is blown; 2. Inspect the wiring of the power circuit. II. The current output is at zero level (4 mA) after the power is turned on. Causes of the fault: 1. The orientation of the sensor’s indicator is opposite to the flow direction of the fluid ； 2. The excitation power cable of the converter is connected incorrectly ； 3. The input signal lines E1 and E2 are reversed. Maintenance method: 1. Adjust the direction of the sensor to be aligned with the flow direction of the fluid ； 2. Reconnect the wires in the correct manner ； 3. Swap the signal wires E1 and E2. III. If the output signal exceeds 20 mA after power is applied or during operation, this may be due to the fact that the range of the insert-type electromagnetic flow meter is smaller than the actual measurement range; we can reset the flow meter’s range to a more appropriate value. IV. The output signal gradually decreases or becomes zero during operation. Causes of the fault: 1. Water ingress into the sensor ； 2、Poor insulation of the signal wire ； 3. There is buildup on the electrode surface, reducing its ability to pick up signals. Maintenance method: 1. Eliminate water ingress ； 2. Replace the signal cable ； 3. Clean the electrodes. V. Excessive fluctuations in the output signal. Causes of the fault: 1. Gas is present at the sensor electrodes, resulting in poor contact between the electrodes and the medium being measured ； 2. There is accumulation on the electrode surface, resulting in poor contact between the electrode and the medium ； 3. The actual flow rate of the medium fluctuates greatly ； 4. Poor grounding. Maintenance methods: 1. Install correctly to eliminate the influence of gases in the pipeline ； 2. Clean the electrode surface ； 3. Increase instrument damping time ； 4. Improve the grounding method. For more information, please visit the company’s official website at http://www.yb1518.com/. Please retain this link when reproducing the content! http://www.yb1518.com/UploadFiles/201412269333291.jpg