10
SFIDK.PS.028.S2.02
3.5
Mode of operation
The flow measuring principle is based on coriolis law of movement.
The flowmeter consists of a sensor type FC300 and a transmitter MASS 6000.
The FC300 sensor is 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 liquid or gas
flows through the sensor, the coriolis force acts on the measuring pipe and causes a pipe
deflection which can be measured as a phase shift on pick-up 1 and 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 two pick-ups 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 two pick-ups, the temperature measurement, and the driver
frequency are fed into the MASS 6000 transmitter used for calculations of mass flow, volume
flow, fraction flow, temperature, and density.
Summary of Contents for SITRANS F C MASSFLO
Page 24: ...24 SFIDK PS 028 S2 02 Dimensional drawings 9 9 1 Standard version 40 115 C 40 239 F ...
Page 25: ...25 SFIDK PS 028 S2 02 9 2 High temperature version 40 180 C 40 356 F ...
Page 26: ...26 SFIDK PS 028 S2 02 Appendix 10 10 1 UL certificates ...
Page 27: ...27 SFIDK PS 028 S2 02 10 2 ATEX certificate standard version 40 115 C 40 239 F ...
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Page 31: ...31 SFIDK PS 028 S2 02 10 3 ATEX certificate high temperature version 40 180 C 40 356 F ...
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