In order to make the electromagnetic flow meter operate stable and reliable, the following requirements should be paid attention to when selecting the installation site.
When there is no flow or small flow, the heavy solids in the fluids are down and the fatty substances are up to be away from the electromagnetic flow meter electrodes area.
The water intake of the cylinder is controlled by the electromagnetic flow meter and the water intake reading on the display screen of the operating water.
The electromagnetic flow meter measures the volume flow rate of the fluid under test, and the influence of temperature, pressure, density and viscosity of the fluid is not involved in the measurement principle.
In this regard, we need to pay attention to the use of the above medium with a higher temperature sterilization process, which is with the electromagnetic flow meter lined with a certain risk, if the operation is a little careless, easy to damage the instrument.
When mounting the electromagnetic flow sensor in Cathodic Protecion Pipe, grounding wires should by pass the sensor and bridge joint the two flanges and isolate the cathodic protection current and mag flow sensor.
The insertion type vortex flow meter can measure the velocity of the lower limit of 0.32m/s, and the electromagnetic flow probe can measure the flow of the lower limit is unlimited, but the error is slightly larger. Some, about+ 0.2%R+1mm/s.
When the electromagnetic flow meter is used to measure the viscous liquid with dirt, the sticky substance or sediment adheres to the inner wall or the electrode of the measuring tube, so that the output potential of the transmitter changes, which brings measurement error, and the dirt on the electrode reaches a certain level.
When the magnetic flow meter sensor is installed on the plastic pipe or the pipe with insulating paint or paint, the two ends of the mag flow sensor should be installed with ground wire, so that the measured medium in the pipe and the earth short circuit have zero potential, otherwise the electromagnetic flow transmitters cannot work normally.
When a certain section of the upstream and downstream tubes of the electromagnetic flow tube is not filled with liquid and the pipeline pressure fluctuates, the average flow rate is zero, and the axial flow velocity flowing through the electrode has a certain swing.
The magmeter's flow sensor is installed into the closed pipelines and measures an induced voltage produced by the conductive liquid as it passes through the pipeline, the electromagnetic flow transmitter get the voltage signal from the flow sensor and after processing, display the fluids flow rate on the digital display also output current( 4-20mA)or pulse signal to upper control systems.
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