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Análisis de las técnicas de mantenimiento de caudalímetros electromagnéticos

No product can escape its own laws and rules, and the same is true for electromagnetic flowmeters. In order to use it more effectively, it is inseparable from daily maintenance and care. How to maintain and maintain the flowmeter? Suzhou Beite-Intelligent Instruments has special methods to pay attention to, which can not only make the flowmeter more effective, but also extend its service life.

When the electromagnetic flowmeter is not in use, or we call it shutdown, we must take reasonable maintenance and effective maintenance methods for the flowmeter. There will be a period of time when the measurement data is inaccurate during the use of the flowmeter. In fact, this is not necessarily a problem caused by the quality of the flowmeter.

We must first check the external condition of the flowmeter, such as whether the power supply is intact, whether the pipeline is damaged or the medium in the pipeline is not full, whether there are bubbles in the pipeline, whether the signal cable is damaged, and whether the converter output signal (that is, the input circuit of the rear instrument) is open. When encountering problems, we must treat them calmly, eliminate the situation from the outside to the inside, and remember not to blindly dismantle and repair the ammeter. We must know that most of the problems are often caused by the fact that people do not follow the instructions and reasonably maintain the flowmeter.

After talking about the maintenance of electromagnetic flowmeter, what are the faults in use?

Fault cause analysis: When the output signal exceeds the full range value, the following reasons can be considered

There is a lack of liquid connection between the electrode and the sensor, and the liquid crystallizes, thereby introducing electrical interference; or the cables are disconnected from each other, causing wiring errors; the sensor and the transmitter are not properly matched, causing setting errors.

Fault solving measures

First, it is necessary to determine whether the specific location of the fault is before or after the sensor or at the instrument. It occurs before the sensor, that is, at the signal cable (ignoring the possibility of internal faults in the instrument); after that, it is the DCS system itself or the sensor itself.

Secondly, check whether the cable is completely covered and whether the electrode is in full contact with the liquid. Usually, the signal circuit of the electromagnetic flowmeter consists of the connection end, cable, liquid between electrodes and electrodes. Not only should the circuit be checked for continuity and connection, but also the cable model should be carefully verified to ensure that the contact is correct and matched, and to confirm that the insulation meets the requirements.

Again, confirm the accuracy of the converter preset value, zero point and full scale. The flow, caliber and setting parameters between the sensor and the converter should be consistent. Then, check the lower instrument. If the signal strength is found to exceed the range, it should be electrically isolated in time. In addition, check the electrical interference introduced by the liquid itself. When there is no current, an oscilloscope or multimeter can be used to detect interference. Finally, check the transmitter itself.