Electromagnetic flowmeter fluid noise causes the following conditions 1. The corrosion resistance of the stainless steel electrode is that the infrared carbon-sulfur analyzer has a very thin passivation layer on its surface, so that the electrochemical reaction reaches an equilibrium state. Solids in the fluid hit the electrode, causing the electrode surface passivation layer to be destroyed, losing electrochemical equilibrium. The contact of the metallic material with the fluid medium has the ability to regenerate the surface passivation layer to maintain electrochemical equilibrium. During the electrochemical equilibrium, free ions in the metal and fluid continuously undergo electrochemical reactions under the action of the signal electric field. The solid particles hit the electrode and continuously destroy the protective passivation layer; the electrochemical reaction repeatedly generates a passivation layer, so that the potential between the electrodes continuously changes, and this changed potential causes fluid noise in the flow signal. This situation is also known as slurry noise in electromagnetic flowmeters. The theory and practice show that the increase of the frequency of the electric field that influences the electrochemical reaction signal increases the amplitude of the fluid noise rapidly. This is why the high frequency excitation and the dual frequency excitation can solve the slurry measurement. 2. Fluid friction lining and electrode infrared carbon-sulfur analyzer. The positive and negative ions in the fluid are separated from the electrolyte fluid. The rougher the lining and electrode surface, the higher the free ion concentration. Due to the electric field of the electrode signal, a part of the ions will move toward the electrode to form a noise voltage. Such noise is called flow noise. Flow noise is more prominent at low conductivity measurements. The flow noise is related to the strength of the external electric field. When the flow rate is high, the larger the inductive signal, the greater the noise amplitude and the unstable output. 3. The rapid changes in fluid conductivity and pH will also create flow noise. The measurement instability of the upstream meter's dosing performance is a typical example. The reason is that when different media are mixed unevenly, the positive and negative ions can be easily separated in the fluid. Due to the electric field of the signal from the electrode, part of the ions will move toward the electrode, forming a flow noise voltage and causing instability of the output. 4. The thickness of the laminar boundary layer near the lining and the electrode becomes very thin due to the high flow velocity of the flowing fluid. The roughness of the lining and the electrode highly breaks through the thickness of the laminar boundary layer of the velocity flow, the fluid hits this part of the roughness height, and the flow velocity occurs. Divergence and mutation. Some of the velocity components that are in the same direction (or opposite) to the central axis of the measuring tube are affected by the signal weight function and have a great influence on the electrode signal, forming a large positive error. This is also the high-end flow rate noise flowmeter. Spark Plug Wrench,Spark Plug Socket Wrench,Plug Spanner Set,Plugs Spanner WUQIANG HONGMA TOOLS MANUFACTURE CO., LTD , https://www.hmrapairtools.com