SITRANS F C MC2
Operating Instructions, 10/2009, A5E02154544-02
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Description
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Measurement of liquids and gases
SITRANS F C Coriolis mass flow meters are designed for measurement of a variety of
liquids and gases. The meters are multi parameter devices offering accurate measurement
of mass flow, volume flow, density, fraction, Brix/Plato, and temperature.
Main applications
The main applications of the Coriolis flow meter can be found in all industries, such as:
● Chemical & Pharma: Detergents, bulk chemicals, pharmaceuticals, acids, alkalis
● Food & Beverage: Dairy products, beer, wine, softdrinks, plato/brix, fruit juices and pulps,
bottling, CO
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dosing, CIP/SIP-liquids
● Automotive: Fuel injection, nozzle & pump testing, filling of AC units, engine consumption,
paint robots
● Oil & Gas: Filling of gas bottles, furnace control, CNG-dispensers, test separators
● Water & Waste Water: Dosing of chemicals for water treatment
3.1
Coriolis Mass flow meters
The Coriolis principle of measurement
The flow measuring principle is based on Coriolis law of movement.
The SITRANS F C sensors are energized by an electromechanical driver circuit which
oscillates the pipe at its resonant frequency. Two pick-ups, 1 and 2 are placed symmetrically
on both sides of the driver. When the media flows through the sensor, Coriolis force will act
on the measuring tube and cause a tube deflection which can be measured as a phase shift
from pick-up 1 to pick up 2.
The phase shift is proportional to the mass flow rate. The amplitude of the driver is
automatically regulated via a "phase locked loop", to ensure a stable output from the 2
pickups in the region of 80 to 110 mV. The temperature of the sensor is measured by a
Pt1000, in a wheatstone configuration (4-wire).
The flow proportional signal from the 2 pick-ups, the temperature measurement and the
driver frequency are fed into the transmitter (SITRANS F C MASS 6000 or SIFLOW FC070)
for calculations of mass, density, volume, fraction, Brix/Plato, and temperature.
ASIC
The analog to digital conversion takes place in an ultra low noise ASIC with 23 bit signal
resolution. The signal transfer function is based on a patented DFT technology (Discrete