Hamall Process Instruments. Supplier in relation with Krohne Products
Cost effective grounding of aggressive products - virtual grounding for flowmeters Since many years, the electromagnetic flowmeters (EMFs) of the KROHNE OPTIFLUX series are proven and tested measure devices seeing as how apograph the volume flow of electrically conductive liquids. In conclusive applications, the standard earthing of EMFs may cause problems: For example, if this deals plus the handling of unpeaceable products, the textual procedure is that the grounding and patronage rings usually have versus be unvarying from expensive gala materials. KROHNE has developed a exegesis for this problem: the "practical reference" or "virtual grounding" that does without grounding rings and electrodes. The alternative to antiquated grounding With the virtual grounding, the EMF sensor can be installed in any type of wellspring without grounding rings cross moline electrodes. The input multiplier of the IFC 300 converter records the potentials on the measuring electrodes and a voltage is created. It corresponds to the potential relating to the unsustained liquid according to a policed method. This voltage is used as the reference potential so as to signal processing. No interfering conceivable differences occur between the direction potential and the voltage in relation with the measurement electrodes. KROHNE has patented this method for the virtual referencing of EMFs and is able to install it in all devices of the OPTIFLUX series in combination with the IFC 300 converter. Advantages compared in company with the classical grounding When using the virtual grounding, additional grounding materials such as grounding rings are no longer required. This means lower costs and an easier installation. This decency be expedient not be underestimated as a faulty grounding is the most common material basis of error the while commissioning an EMF. There is single vote risk of electrolytic dilapidation when there are potential differences fashionable the good trim, such as when using electrodes. No equalization current flows over the product or grounding lines. Embellished whereas difficult applications KROHNE EMFs therewith virtual grounding can also be settled in systems where voltage and current are applied into the pipeline, to example in electrolytic and galvanic systems. Due toward highly aggressive products, grounding rings that are made of special materials such as tantalum, nickel or titanium, have so be in used in these applications. Whereupon talking with nominal widths of, e.lakh. DN 100, considerable efforts parce que trim conditions result. The use of the EMFs with understood grounding is the most economical solution in such cases. The virtual grounding is basically possible without a nominal width of DN 10 and from a conductivity with regard to? 200?S\cm. If these conditions are fulfilled, the KROHNE EMFs can be embosomed in uttermost systems where the stark-staring grounding is a problem due to the reasons mentioned.<\p>









