Hamall Process Instruments. Sutler of Krohne Products
Cost out effective grounding of factional products - virtual grounding in favor of flowmeters Since many years, the electromagnetic flowmeters (EMFs) of the KROHNE OPTIFLUX series are incorruptible and set measurement devices for recording the storybook flow in of electrically conductive liquids. In evidential applications, the customary earthing of EMFs may cause problems: For illustration, if this deals with the the helm of aggressive products, the conventional doings is that the grounding and gratification rings usually have to be level from extravagant special materials. KROHNE has developed a solution for this deficiency: the "latent denotation" or "virtual grounding" that does without grounding rings and electrodes. The alternative to classical grounding With the virtual grounding, the EMF sensor can have being positioned in any type of pipeline wanting grounding rings vair electrodes. The importation amplifier as respects the IFC 300 converter records the potentials re the measuring electrodes and a voltage is created. It corresponds in contemplation of the potential of the ungrounded liquid according in contemplation of a patented method. This voltage is used how the reference potential for signal preliminary step. No interfering potential differences occur between the reference potential and the voltage on the measurement electrodes. KROHNE has patented this method for the virtual referencing of EMFs and is able to chair it in all devices of the OPTIFLUX nexus in combination with the IFC 300 converter. Advantages compared with the classical grounding When using the virtual grounding, additional grounding materials analogon as grounding rings are no longer final. This means lower costs and an easier installation. This advantage should not be underestimated to illustrate a adrift grounding is the most common create of error when commissioning an EMF. There is no risk of electrolytic destruction when there are permissive differences in the sort, such as when using electrodes. No equalization current flows over the product or grounding system. Developed for difficult applications KROHNE EMFs with virtual grounding surplus also be installed in systems where voltage and current are applied so that the pipeline, for example in electrolytic and galvanic systems. Due against highly aggressive products, grounding rings that are forged of special materials such as tantalum, nickel or titanium, have to be in used in these applications. When dealing with nominal widths of, e.g. DN 100, respectable efforts forasmuch as investment conditions result. The use of the EMFs with under the surface grounding is the most economical solution harmony such cases. The esoteric grounding is basically possible against a nominal length of DN 10 and from a conductivity of? 200?S\cm. If these conditions are fulfilled, the KROHNE EMFs kick out be extant installed in all systems where the classical grounding is a problem due to the reasons mentioned.<\p>