IC695CRU320 Trusted TMR 24Vdc Analog Input Module

IC695CRU320 Trusted TMR 24Vdc Analog Input Module

IC695CRU320 In magnetic flow meters, proper grounding is very important. Most liquid streams produce very weak electromotive forces (1 mV or less!), so noise voltages from stray currents in pipes and/or liquids may easily overshadow them.) Therefore, noise voltages generated by stray currents in the pipeline and/or the liquid may easily overshadow them. To solve this problem, magnetic flowmeters are usually equipped with a grounded conductor placed around the flow tube to shunt (bypass) stray currents, so that the only voltage intercepted by the electrodes will be the kinematic electromotive force generated by the flow of the liquid, rather than the voltage drop generated by stray currents through the liquid resistance.

When the IC695CRU320 fluid tube is installed in the process line, this common connection point should also be combined with a functional ground. On this particular flow tube, you can see a stainless steel grounding ring near the surface of the flange, connected to a braided grounding strap. There is an identical grounding ring on the other flange, but it is not clearly visible in this photo. These rings provide an electrical contact point with the liquid in installations where the pipe is made of plastic, or in installations where the pipe is metal but lined with plastic material to prevent corrosion. A simple solution to this problem is to replace the polarity of the magnetic field so that the polarity of the electromotive force also changes, never giving the fluid ions enough time to depolarise.

If the piping connected to the flow tube of the IC695CRU320 is electrically conductive (e.g.. Grounding can be accomplished by connecting a metal pipe. The flanks Together with the grounding strap a common grounding point connected to the flow tube body ensures stable contact between the electrodes and the water under flow conditions. Although in theory permanent magnets should be able to provide the necessary magnetic flux for a magnetic flow meter, this has never been done in industrial practice. The reason for this phenomenon is that polarisation occurs when a DC voltage is passed through a liquid containing ions (electrically charged molecules). The electrically charged molecules (ions) tend to collect the opposite charge near the pole, which in this case would be the meter electrode. This “polarisation” soon interferes with the detection of the electromotive force if a magnetic flowmeter uses a constant magnetic flux, such as that produced by permanent magnets.