Electromagnetic flow meter scale what are special testing

Abstract: the electromagnetic flow meter scale what are special detection information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. A, electrode contact resistance measuring electrode spoon of liquid contact resistance, can be not discharged from the pipe flow sensor and indirect estimation juice electrodes and the lining layer surface general situation, help to analysis the cause of the problem. Second, the polarization of electrode voltage measurement electrodes with liquid. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a special electromagnetic flowmeter scale test what the article details. A, electrode contact resistance measuring electrode spoon of liquid contact resistance, can be not discharged from the pipe flow sensor and indirect estimation juice electrodes and the lining layer surface general situation, help to analysis the cause of the problem. Second, the polarization of electrode voltage measuring electrode polarization voltage between the liquid and will help to judge whether the fault of the unstable zero or output shaking caused by electrode is covered by pollution or. With 2 v dc digital multimeter, respectively measure the polarization between the two electrodes and ground voltage ( Electromagnetic flowmeter can not power, power measurement) 。 If two measured values closer to nearly equal, the electrode not contaminated or overwritten, electrode contaminated or otherwise be overwritten. Polarization voltage size is decided by the 'electrode potential of electrode material and the properties of the liquid measurements may be between a few mV to a few hundred mV. Because, in fact, in the operation of the two electrodes contamination situation can't be exactly the same symmetry, then the voltage on the electrode formed asymmetric common-mode voltage. Asymmetry of the common-mode voltage becomes differential mode signal, zero offset. Three measurement signal cable, signal cable interference from electrostatic induction and electromagnetic induction interference can make the electromagnetic flowmeter zero change. To determine whether changes in zero due to the effect of electric potential signal cable interference, to determine the influence degree of the interference range and the electromagnetic flowmeter. Four, determination of presence of grounding potential electromagnetic flow juice during normal use, such as sensors electricity (near Force) Machine status changes ( Such as leakage) , grounding potential changes caused by zero change. Check whether have the influence, the converter can be work terminal short circuit, grounding C terminal and protection of G to zero ( Or instruction value) Changes in judgment for ground potential. Five, the discriminant sometimes for pipeline stray current flow pipelines stray interference sources in the flow sensor also in downstream, upstream to narrow your search, try to reduce or eliminate stray current interference effects. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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