Siemens SITRANS FC330, Руководство по эксплуатации, Страница: 133 / 280

The tube is defined as empty if the measured density value is lower than the value defined via
the Empty Tube Limit parameter.
Note
Process media density
Risk of unintentionally forcing flow values to zero if the difference between the empty tube limit
density value and the density of the process media is not sufficient.
● Ensure sufficient difference between the empty tube limit density value and the process
media density.
8.2.5 Process noise damping
Noise damping function
The dynamic sensitivity of the flow measurement signal to rapid changes in process flows can
be reduced by use of the process noise damping function. The function is typically used in
environment with:
● Strongly pulsating flow
● Changing pump speeds
● Large pressure variations
Process noise damping settings
Reduce interfering process noise by increasing the setting of the parameter Process Noise
Damping.
● Centrifugal pump (1: low)
● Triplex pump (2)
● Duplex pump (3)
● Simplex pump (4)
● Cam pump (5: high)
The default value is Duplex pump. The damping affects all functions and outputs of the sensor.
Centrifugal pump
(1, low) Triplex pump (2) Duplex pump
(3; default setting)
Simplex pump (4)
Cam pump (5, high)
Parameter assignment
8.2 Functions
SITRANS FC330
Operating Instructions, 01/2019, A5E44030648-AB
133