Is there a relationship between an electromagnetic flowmeter and the density of the medium?
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Is there a relationship between an electromagnetic flowmeter and the density of the medium? The trend shown by the electromagnetic flowmeter fluctuates greatly, ranging from 14 to 11 t/h, which is quite unstable; meanwhile, another mass flowmeter on the same pipeline shows a stable value of 11.6 t/h. How should this electromagnetic flowmeter be adjusted?
An electromagnetic flowmeter is a velocity-type flowmeter, and according to its measurement principle, it is independent of the density of the medium. There are many factors that can cause fluctuations in flow rate, such as bubbles in the liquid, surrounding vibrations, and inappropriate setting parameters.
Check whether the measurement range of the electromagnetic flowmeter falls within the actual flow rate, whether there are sufficient straight sections of pipe before and after the flowmeter, and whether there are any high-power motor devices in the vicinity
Just adjust the pulse width and pulse limit
1. Strict requirements are imposed on electromagnetic grounding as well as on shielding against surrounding electromagnetic interference. 2. Although density has no effect on electromagnetics, a change in density indicates a change in the medium; it is possible that the conductivity of the medium has changed significantly, and conductivity has a considerable impact on electromagnetic measurements.
Electromagnetic measurements have nothing to do with density, but density comes into play when there is a conversion during display
An electromagnetic flowmeter measures volumetric flow rate, and it is independent of the temperature, pressure, density, and viscosity of the fluid being measured. Large fluctuations in the measurement values can be caused by: 1. The presence of vibration sources or interference in the vicinity (such as motors, frequency converters, etc.)； 2. Full-pipe measurement was not carried out ； 3. Poor grounding ； 4. Faults in the components of the flow meter itself~~
Electromagnetic flowmeters are independent of the density of the medium but depend on its electrical conductivity. Different electromagnetic flowmeters have different minimum conductivity values that can be measured; generally, this value should not be lower than 5 mS – check the instructions for specific details.
Correction: The dielectric conductivity must not be lower than 5 uS