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『Micro electromagnetic flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Causes and solutions of electromagnetic flowmeter faults
Common causes and solutions of electromagnetic flowmeter faults are as follows:
1. Abnormal power supply due to no flow signal output of the instrument: unstable output voltage of the power circuit board or abnormal power supply. Solution: Check if the voltage of each circuit on the power circuit board (such as ± 12V, ± 24V) is normal to ensure stable power supply. The cause of cable connection problems: signal cables or power cables are not in good contact, open or short circuited. Solution: Reconnect the cable, check if the connector is loose, and confirm that the cable is not damaged. Reason for inconsistent liquid flow state: The liquid is not filled in the pipeline or the flow direction is incorrect, resulting in the inability to form effective induced electromotive force. Solution: Adjust the pipeline design to ensure that the liquid is full and the flow direction is consistent with the instrument identification. Reason for sensor malfunction: Scaring on the inner wall of the sensor, electrode corrosion, or component damage. Solution: Regularly clean the attachments on the inner wall of the sensor, check the condition of the electrodes, and replace damaged parts if necessary. Reason for converter damage: Aging or breakdown of internal components of the converter. Solution: Replace damaged components or directly replace the converter module.
2. Electromagnetic interference caused by output value fluctuations: There are strong electromagnetic devices such as large motors and welding machines nearby, which interfere with signal transmission.
. Solution: Keep away from interference sources or shield the instrument grounding wire. Rea
Thirdly, the measured flow value does not match the actual value. The reason for the transmitter circuit fault is that the transmitter circuit board is damaged or the signal amplification is abnormal.
. Solution: Check if the solder joints on the circuit board have come off, and replace the circuit board if necessary. Reason for low flow rate or presence of bubbles: The liquid flow rate is below the minimum measurement limit or contains tiny bubbles. Processing: Increase the flow rate above the minimum limit; If there are bubbles, a degassing device needs to be installed. Reason for signal cable problem: Loose cable connection or decreased insulation performance. Solution: Reconnect the cable and use a megohmmeter to check the insulation resistance (should be ≥ 50M Ω). Reason for parameter setting error: Inaccurate setting of converter range, zero point or full scale value. Processing: Re calibrate parameters based on actual flow and verify zero drift.Fourth, the reason for the wiring error of the output signal exceeding the range signal is that the polarity of the signal cable is reversed or short circuited.
. Solution: Check the signal circuit connection to ensure correct positive and negative pol