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The factors that prevent maintenance and non-stop maintenance of the electromagnetic flowmeter are measured.

The maintenance and maintenance of the electromagnetic flowmeter is more important, because regular maintenance and maintenance can increase the service life of the electromagnetic flowmeter. What is the relationship between the maintenance and maintenance of the electromagnetic flowmeter during maintenance? For example, the medium with higher viscosity needs to be shut down for maintenance. The ordinary water does not need to be shut down for maintenance. The water is filtered from the valve body of the electromagnetic flowmeter several times to ensure that the inner wall electrode of the valve body is clean. When the electromagnetic flowmeter is not used when it is shut down, we must take scientific and reasonable maintenance and maintenance methods for the electromagnetic flowmeter. Many people find that after using the electromagnetic flowmeter for a long period of time, the inaccuracy of the found measurement data is used again. In fact, this is not a quality problem in the electromagnetic flowmeter itself. It is because the use of *** is not maintained and maintained in accordance with the instructions in the manual. The ideal state of the electromagnetic flowmeter is to measure the full flow of the medium and the continuous flow of the fluid, and do not stop or stop the flow, but as a variety of work sites, there are many cases where only intermittent measurement is required, so the electromagnetic flowmeter It must also be measured intermittently. In the measurement of the electromagnetic flowmeter, due to the flow of the fluid, it is not easy to produce sediment, but after the shutdown, it is difficult to avoid the deposition of dirt and other substances in the electrode and the inner cavity of the instrument. According to experience, we know that After using it for a long time, it will often be faulty. Therefore, it is necessary to have a correct and reasonable maintenance of the electromagnetic flowmeter under the shutdown state, so as to extend the service life of the instrument and improve the accuracy of the measurement. This article discusses with you the content of this aspect.
Electrode maintenance of electromagnetic flowmeter
Electromagnetic flowmeter features inspection and adjustment
Before the electromagnetic flowmeter is put into operation, it must be adjusted after the electromagnetic flow sensor is full of liquid and static. After being put into operation, it is also necessary to check the characteristics of the periodic stoppage of the use conditions; especially for sedimentation and contamination of the electrode, the non-cleaning liquid containing the solid phase should be inspected at the initial stage to obtain the experience to determine the normal inspection cycle. AC excitation type electromagnetic flowmeter and rectangular wave excitation ratio, *** easy to produce characteristic drift, so *** should pay attention to inspection and adjustment.
Electromagnetic flowmeter regularly checks sensor electrical performance
First, the resistance between the electrodes is roughly measured. Disconnect the signal between the sensor and the converter. The sensor is filled with liquid. Use a multimeter to measure the resistance of the two electrodes and the ground. It is within the specified range of the manufacturer and the measured values are roughly the same. Record the resistance value for the next measurement, which is useful for later determining the cause of the sensor failure (such as whether the deposited layer is conductive or marginal).
Next, the sensor is emptied of liquid, and the inner wall is wiped clean. After it is completely dried, the resistance between the two electrodes and the ground terminal is measured with a megaohm meter. After that, check the edge resistance of the excitation coil, remove the sensor excitation coil, connect the terminal to the converter, and measure the edge resistance of the coil with a megaohm meter. Have you learned these maintenance methods? Do not think that the flowmeter is not used, it does not pay attention to maintenance, which will only accelerate the damage to the flowmeter.
An example of an application error that causes two layers to fail.
One is the oil drilling and cementing project. The total flow of cement slurry is an important process parameter, often using a high-pressure electromagnetic flowmeter. The meter is used intermittently. After use, rinse the sensor measuring tube with clean water, and the rest of the time is empty. Because the cleaning is not thorough, the residual cement slurry on the inner wall of the measuring tube is solidified into a thin layer, and the edge layer is accumulated in the past two months, covering the entire electrode surface, resulting in abnormal operation and failure to work.
The other is the electrolytic cutting process inspection device. The electromagnetic flowmeter is used to control the flow rate of saturated brine. After the high period of the gap is used, the flow signal is gradually weakened. After 2 months, the signal is ***. The reason is that iron oxide is deposited on the wall of the tube during electrolytic cutting, resulting in a short circuit. Clearing the stratification immediately returns to normal.

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