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The frequency and amplitude of the driver is regulated to ensure a stable output from the 2
pickups. The temperature of the sensor tubes is measured to provide accurate compensation
for changes in the material stiffness. As a result the process media temperature is also
accurately measured.
The flow proportional phase signal from the pickups, the temperature measurement and the
driver frequency enable calculation and reporting of mass, density, volume, and temperature.
Digital signal processing (DSP)
The analog to digital conversion takes place in an ultra low noise sigma delta converter with
high signal resolution. With fast digital signal processing massflow and density values are
calculated using a patented DFT technology (Discrete Fourier Transformation). The
combination of this patented DFT technology and the fast DSP enables short response time
(< 10 ms) to changes in the measured values.
The built-in noise filter is configurable and can be used for improving the performance of the
flowmeter, in case the installation and application conditions are not ideal. Typical process
noise such as gas bubbles (two-phase-flow) can be reduced through the filter functions.
Description
3.5 Theory of operation
FC430 (From firmware 4.0)
Operating Instructions, 06/2017, A5E39789392-AA
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Содержание SITRANS FC430
Страница 40: ...Description 3 5 Theory of operation FC430 From firmware 4 0 40 Operating Instructions 06 2017 A5E39789392 AA ...
Страница 94: ...Connecting 5 4 Device nameplates FC430 From firmware 4 0 94 Operating Instructions 06 2017 A5E39789392 AA ...
Страница 150: ...Operating FC430 7 2 HMI FC430 From firmware 4 0 150 Operating Instructions 06 2017 A5E39789392 AA ...
Страница 182: ...Functions 8 16 Maintenance FC430 From firmware 4 0 182 Operating Instructions 06 2017 A5E39789392 AA ...
Страница 262: ...Dimensions and weight 12 5 Mounting bracket FC430 From firmware 4 0 262 Operating Instructions 06 2017 A5E39789392 AA ...
Страница 534: ...Index FC430 From firmware 4 0 534 Operating Instructions 06 2017 A5E39789392 AA ...