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8. Function Description
The
MF3000-*-Ex*
system is designed for the flow measuring of solid substances in metallic pipelines.
It enables the flange mount at vertical pipes at the free-fall transport and at horizontal pipes at the
pneumatic material transport. Equipped with the newest microwave technology, a modern K band
transceiver is used. As a result, the supply current for the
MF3000-*-Ex*
sensor could be reduced to
less than 25 mA. The working frequency of the probe lies in the internationally free available frequency
area between 24.15 ... 24.25 GHz, in which the maximum radiated power is less than 20 mW. An at the
pipe welded installation flange, through which the pipe wall will be drilled afterwards, serves as a
mechanical mount for the
MF3000-*-Ex*
sensor. From the flush mounted
MF3000-*-Ex*
inside of the
pipe, the microwave will be radiated into the metallic pipeline which serves as a measuring chamber.
The radiated wavefronts meet the flowing solid substances and lead to a frequency displacement
(Doppler effect) of the reflected signal. The intermediate frequency signals, whose frequency and
amplitude are proportional to speed and size of the solid substance parts, will be collected and used as
basis for the calculation of the solid substance quantity. Deposits at the pipe wall will not influence the
measurement.
Placed in a stainless steel housing, the measuring sensor is connected to the
MFI3000
transmitter by a
4-wire cable and can be parameterized and calibrated online by a RS485 interface.
The raw measuring value of the solid substance quantity is transmitted for analysis to the transmitter.
The result is provided as an analogue 0/4-20mA- or 0/2-10 V- signal or as a digital process value at the
RS485 interface.
A passive pulse output enables the external integration of the solid substance quantity. A relay output
is used as the min/max alarm or can be used for sensor monitoring. After parameterization and
calibration of the
MF3000-*-Ex*
system, the measuring value can be observed at the online-mask or by
using the data logger of the software
MF-SMART.
Fig. 14
