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What is density correction used for?



For measuring the filling level of liquids with a density that is other than 1.0 kg/dm³ (i.e. not the same as water).
For instance: 0.85 kg/dm³ (benzine) can be selected in two different ways:

  • by adjusting the span (parameter P6)
  • by adjusting the density correction (parameter P0)

The final result is the same in both cases.

The second method, using the density adjustment parameter, is easier for the user if the density changes from time to time, as it can then be manually corrected by using the keys on the instrument.

Medium
Density
Filling level
Measured pressure
Water
1,00 kg/dm3
10 m
1,00 bar
Benzine
0,85 kg/dm3
10 m
0,85 bar



Example for Filling level measurement Benzine
Density: 0,85 kg/dm³
Filling level: 10 m
Nominal range: 4 bar (=100%)

Configuration (1): by setting the measurement span (parameter P6)

Medium
Density
Measurement span P6
Density correction P0
Water
1,00 kg/dm3
25,00 %
1.00
Benzine
0,85 kg/dm3
21,25 %
1.00


Configuration (2): by setting the density correction (parameter P0)

Medium
Density
Measurement span P6
Density correction P0
Water
1,00 kg/dm3
25,00 %
1.00
Benzine
0,85 kg/dm3
25,00 %
0.85