Sensor features
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BeWa MCS1xxx-T005 4668567a en-us 2022-06-14.docx
2022-06-14
Sensor features
The MetallicContamination Sensor MCS is a stationary sensor for continuous
monitoring of contamination of fluids – especially lubrication fluids – with
metallic particles.
With appropriate system knowledge of the monitored system, damage
resulting in detectable metallic particles can be discovered early.
The MCS uses digital signal processing to distinguish between ferromagnetic
(Fe) and non-ferromagnetic (nFe) particles.
Particle results are signaled via two switching outputs. the factory setting
(default values), the ferromagnetic (Fe) particles are output via the first
switching output and the non-ferromagnetic (nFe) particles via the second
switching output. It is possible to make a switch in the menu so that the first
switching output is used for the total particles (Fe and nFe) and second
switch output is used as a "device ready signal". (For this, see also the
chapter Using switching output.)
In addition, the MCS has serial communication interfaces with which
connection to superordinate monitoring systems is possible.
The MCS is intended for incorporation in low-pressure circuits and test
benches.
Functional principle
Within the sensor, a high-frequency magnetic field is generated using a coil
system. Two sensor pulses measure changes in the field strength and output
certain signals as described below.
•
A ferromagnetic (Fe) particle, the field strength increases depending
on the size of the particle.
•
A non-ferromagnetic (nFe) particle, the field strength decreases
depending on the size of the particle.
•
If a prespecified limit is exceeded, a particle event is signaled.
•
The MCS is able to implement variable adjustments to the defined limit
in order to avoid faulty particle counter results. This makes it possible
to suppress the results for Dimension A and D temporarily (Noise
Suppression) in the event of a very strongly fluctuating field strength
(e.g. following excessive air intake into the system).
The output signal at the switching output is always the same and provides no
information about the size of the particle.
Using the serial interfaces (RS 485 or HSI) makes it possible to evaluate
appropriate particle size classes.
