Density-Compensated Level Measurement - Vega VEGABAR 87 Operating Instructions Manual

Measurement setup
VEGABAR 87 • Slave sensor for electronic differential pressure
Fig. 12: Measurement setup for density measurement, h = distance between the
two measuring points
1 VEGABAR 87
2 VEGABAR 87 - Slave sensor
The length distance h of the two sensors should be at least 10 %,
better 20 %, of the final value of the sensor measuring range. A bigger
difference increases the accuracy of the density measurement.
Slight density changes cause only slight changes of the measured
differential pressure. The measuring range must hence be selected
accordingly.
The density measurement is possible in open as well as in closed
vessels.
4.7

Density-compensated level measurement

The master/slave combination is suitable for density-compensatedlev-
el measurement in an atmospherically open vessel
Keep the following in mind when setting up the measuring system:
•
Mount the master sensor below the min. level
•
Mount the slave sensor above the master sensor
•
Mount both sensors away from the filling stream and emptying and
protected against pressure shocks from the stirrer
1 2
4 Mounting
19