What are the effects of impurities on electromagnetic flowmeters in the medium
Usually there is more or less a mixture in the fluid in the measurement of some occasions. In general, in the presence of a small bubbling flow of oil and gas bubbles, it is still able to work normally, but the measurement is a fusion of the volume of oil bubbles, if the proportion of oil and gas rises to have caused a projectile flow, then the electrode may be covered by gas, resulting in the circuit is disconnected, the output shake is more likely to be directly damaged.
If there are non-ferromagnetic particles or fiber solid-liquid two-phase flow can be measured to its volume flow. Media that contain more solids, such as drilling mud or pulp used to drill well cementing water, are actually classified as non-Newtonian fluids.
Because the solid flows in the carrier liquid, there is friction between the two, and there will be a difference in speed, and then if the single-phase liquid flowmeter is in such a situation (solid-liquid two-phase flow), there will be an error. However, in the experiment of the electromagnetic flowmeter of Qingtian Instrument in the solid-liquid two-phase flow, there was no impact on the experimental results, but there are still other flowmeter reports that the general solid substance if it contains 15%, then it will generally affect 3% of the data.
In the electromagnetic flowmeter is used for a long time or itself, applied to the measurement of easy adhesion and sediment media, this is the adhesion layer on the wall of the tube, if it is attached to a conductive medium that is higher than the conductivity of the liquid, then the signal will be short-circuited, if the non-conductive material should first consider the contamination of the electrode. If the scale layer is attached to calcium carbonate, etc., then the conductivity will be lower than the liquid, and the measured data will be higher than the actual flow rate.
