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Brief introduction to the signal problem of electromagnetic flowmeter

When using electromagnetic flowmeters, we often have to consider how to deal with unrecognized signals or signals that are too weak. We should look for the following possible problems:

1. If the pipe is too close to the wall, the probe can be installed on the diameter of the pipe with an inclined angle, and it is not necessary to install it on the horizontal pipe diameter. The Z method should be used to install the probe.
2. Verify that the tubing is full of fluid.
3. Carefully select the dense part of the pipe and polish it thoroughly. Apply a sufficient chelating product to mount the probe.
4. Carefully move each probe slowly around the mounting point to find the maximum signal point to prevent missed reception of strong signals due to fouling of the inner wall of the pipe or due to local deformation of the pipe causing the ultrasonic beam to reflect the expected area. Installation point.
5. For metal pipes with serious internal fouling, the scale may be peeled off or cracked by tapping. However, it should be noted that this method sometimes does not contribute to the transmission of ultrasonic waves because of the gap between the scale and the inner wall.
The maintenance of the electromagnetic flowmeter should follow a certain order, so as to avoid the mistakes of entering the maintenance, causing unnecessary delays and losses.
What is the best way to repair the ZR-LDE electromagnetic flowmeter? What is the benefit of the maintenance of the electromagnetic flowmeter? This is what we should consider as an instrumentation using electromagnetic flowmeter. Electromagnetic flowmeters generally do not require routine maintenance. However, if the measured medium is easily adhered or fouled on the inner wall of the electrode and the measuring tube, the inner wall and the electrode of the measuring tube should be cleaned regularly, taking care not to damage the lining and the electrode.
If your electromagnetic flowmeter fails, Zhirui recommends that you find, analyze, and troubleshoot the faults one by one in the following order.
First, measure whether the medium in the tube is full, whether the lining and the electrode are fouled; whether all the cable connections are reliable;
Second, whether the grounding requirement is satisfied; whether the excitation coil is short-circuited or open-circuited, and whether it is insulated from the ground;
Third, whether the medium in the piping system leaks, whether the upstream and downstream valves have an influence, and whether the installation position is suitable;
Fourth, whether the surrounding environment interferes with the flowmeter; whether the converter has failed.
In addition, regarding the period of re-examination of the electromagnetic flowmeter, it is recommended that the electromagnetic flowmeter be inspected once every two years, and users with higher accuracy requirements should be sent for inspection every year.
Experience tells us that a well-designed, well-used electromagnetic flowmeter requires not only high-quality hardware assurance, but also scientific and complete software support to effectively play its due role. I hope that the above introduction can help you better maintain the electromagnetic flowmeter. Only by maintaining the instrument, the service life of the instrument will be longer and the measurement accuracy will be more accurate.

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