Intelligent electromagnetic flowmeter problem how to troubleshoot: 1. Instrument no display; 2. Check the power is connected; 3. Check the power fuse is intact; 4. Check the power supply voltage meets the requirements; 5. Check whether the display contrast adjustment can be adjusted, And adjust whether it is appropriate.

Electromagnetic flowmeter fault causes the following aspects: environmental aspects; fluid aspects; installation aspects.

For fluid reasons: The presence of evenly distributed microbubbles in the liquid to be measured usually does not affect the normal operation of the electromagnetic flowmeter. However, as the air bubbles increase, the output signal of the instrument fluctuates. If the air bubbles are large enough to cover the entire surface of the electrode, As the bubble flows through the electrode, the electrode circuit will momentarily open and cause greater fluctuations in the output signal. When the low-frequency square-wave excitation electromagnetic flowmeter measures excessive solid content slurry, it will also produce slurry noise, causing the output signal to fluctuate. When measuring mixed media, if you enter the flow sensor for measurement before the mixing is not uniform, the output signal will also fluctuate. Improper matching of electrode material and measured medium will also affect normal measurement due to chemical action or polarization. The electrode material should be properly selected according to the instrument selection or related manuals.

Installation reasons: Usually the electromagnetic flow sensor installation position is not properly caused by the failure, the common if the sensor is installed in the highest point of the pipe easily accumulate gas; or installed in the vertical pipe from top to bottom, there may be emptying; Or there is no back pressure behind the sensor and the fluid is directly discharged into the atmosphere to form a non-full tube inside the measuring tube.

Environmental reasons: Usually it is mainly caused by stray current interference in the pipeline, strong electromagnetic wave interference in space, and magnetic field interference in large-scale motors. Pipeline stray current interference usually achieves satisfactory results with good individual ground protection, but in the case of strong stray currents (such as the electrolytic shop pipe, sometimes the peak potential of the AC potential induced at the two electrodes can be as high as 1V), Additional measures must be taken to insulate the flow sensor from the pipeline. Space electromagnetic interference is generally introduced via signal cables and is usually protected by single or multiple layers of shielding.

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