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1. Kaifeng electromagnetic flowmeter air traffic alarm handling method
The handling method of Kaifeng electromagnetic flowmeter air traffic alarm mainly includes the following process: confirm whether the measured fluid is filled in the measuring tube. The primary reason for the air traffic alarm is that the fluid inside the measuring tube is not full, and it is necessary to check whether there is any leakage, gas accumulation or insufficient fluid flow in the pipeline. If the fluid is not fully filled, the process flow or pipeline design needs to be adjusted to ensure that the fluid continues to fill the measuring tube. Short circuit test: Connect the converter signal to terminals SIG
1, SIG2, and SIGGDN with wires, and observe whether the "empty tube" prompt is cancelled. If the prompt is cancelled, it indicates that the converter is normal. Further check whether the conductivity of the measured fluid is too low (below the threshold), or whether the empty tube threshold and range parameters are set incorrectly. If the prompt has not been revoked, the converter may have a malfunction and the manufacturer needs to be contacted for repair. Check the connection of the signal line to confirm whether the signal line (SIG
1, SIG
2, SIGGDN) of the electromagnetic flowmeter is firmly connected to the converter and sensor to avoid poor contact or open circuit. Focus on checking whether the wiring terminals are loose, oxidized, or connected incorrectly. Detection of sensor electrode state conductivity ratio test: When the flow rate is zero, observe that the displayed conductivity ratio should be less than 100%. If the conductivity ratio is abnormal, signal distortion may be caused by electrode contami
1, SIG2, and SIGGDN should be less than 50k Ω. If the resistance exceeds the standard, it may be due to electrode aging, corrosion, or insulation damage. DC voltage test: Use a multimeter to measure the DC voltage between DS1 and DS2, which should be less than 1V. If the voltage is too high, it indicates that the electrode is contaminated (such as scaling or deposits) and needs to be cleaned. If electrode contamination is detected during the cleaning of the sensor electrode, the cleaning method should be selected according to the fluid properties: rinse with clean water: suitable for general dirt, use a soft bristled brush or cotton cloth to wipe the surface of the electrode. Chemical cleaning: For stubborn dirt (such as oil stains and corrosive substances), soak it in a specialized cleaning agent and rinse it off. Mechanical cleaning: If the electrode is severely scaled, the sensor needs to be disassembled for deep cleaning, taking care to avoid damaging the electrode surface. Adjust the parameters of the air traffic control alarm. If the fluid conductivity is confirmed to be normal and the hardware is not faulty, check the threshold and range settings of the air traffic control alarm. Threshold setting: Adjust the sensitivity of the air traffic control detection according to the fluid characteristics to avoid false alarms caused by signal fluctuations. Range calibration: Re calibrate the flow meter range to ensure that the measurement range matches the actual process. If the alarm still persists after completing the above steps through comprehensive investigation and contacting the manufacturer, it is ne
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