Density

Damping

The damping makes it possible to damp the fluctuations of the measured values of the liquid density:
  • on the display,
  • on the PLC input.
The damping of the liquid density comes in addition to the damping set for each analog output.
The damping of the liquid density comes in addition to the damping set for the mass flow rate.
The damping is not applied to the new measured value if the 2 following conditions are met:
  • a Low, Medium or High damping level is active,
  • and the variation between 2 values that are measured one after the other is higher than 30 % (for example when charging the pipe or stopping the flow).
By default, the measured liquid density values are damped with the level Medium.
Density damping level selections
Damping level
Response time
None
  • 5 s if the Refresh time is set to Long
  • < 0.5 s if the Refresh time is set to Short or Very short.
Low
1 s
Medium
10 s
High
30 s

Mode

Density mode can be selected through the following values.
Density mode selections
Mode
Density value calculation
Measured
Value measured via SAW signals, and liquid temperature
Water
Value calculated based on liquid temperature measured by FLOWave
Constant
Value set to a constant value
Linear
r = a+bT; coefficients a and b to be set by installer, T in °C
Quadratic
r = a+bT+cT
2
; coefficients a, b and c to be set by installer, T in °C
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