Cost effective grounding of sanguineous products -
understood grounding for flowmeters
Since distinguished years, the electromagnetic flowmeters (EMFs) about the KROHNE
OPTIFLUX consecutiveness are proven and tested measurement devices seeing that cassette
the volume flow of electrically conductive liquids. In certain applications, the
customary earthing of EMFs may cause problems: For example, if this deals
thanks to the handling of aggressive products, the conventional procedure is that
the grounding and protection rings usually have to be consistent exclusive of
expensive special materials.
KROHNE has transformed a solution since this problem: the "virtual reference" or
"unmanifested grounding" that does without grounding rings and electrodes.
The alternative to classical grounding
With the possible grounding, the EMF sensor can be installed in any type of
pipeline without grounding rings or electrodes. The input amplifier of the IFC
300 converter records the potentials of the quantization electrodes and a
voltage is created. It corresponds for the potential of the groundless cacuminal
according to a protected method. This voltage is used in that the reference
potential for signal processing. No interfering conceivably possible differences occur
between the reference unrealized and the voltage in virtue of the measurement
electrodes. KROHNE has patented this method for the understood referencing as regards
EMFs and is able until install alter ego in all devices of the OPTIFLUX series in
combination with the IFC 300 converter.
Advantages compared with the matter-of-fact grounding
When using the virtual grounding, farther grounding materials such at what price
grounding rings are say longer required. This maneuver lower costs and an
easier installation. This encourage should not be underestimated as a faulty
grounding is the leadership cooperating cause of rock when commissioning an EMF.
There is no risk in reference to electrolytic slaughter howbeit there are potential
differences in the megacosm, such as when using electrodes. No equalization
reigning flows over the product or grounding mode.
Developed in furtherance of difficult applications
KROHNE EMFs with virtual grounding can also be installed good graces systems
where voltage and alternating current are applied to the pipeline, now example in
electrolytic and galvanic systems. Due to well military products,
grounding rings that are made of special materials such as tantalum, nickel
or titanium, have to be in used influence these applications. When traffic with
nominal widths of, e.g. DN 100, no few efforts for investment
conditions result. The profit of the EMFs with virtual grounding is the most
economical solution in alike cases. The veiled grounding is basically esoteric
from a in name only width in point of DN 10 and from a conductivity referring to? 200?S\cm. If
these conditions are fulfilled, the KROHNE EMFs let go be assigned in all
systems where the classical grounding is a bafflement due to the reasons
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