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4 Mounting
VEGABAR 86 • Secondary Device for electronic differential pressure
48048-EN-220817
1
2
h
Fig. 12: Measurement setup for density measurement, h = distance between the
two measuring points
1 VEGABAR 86
2 VEGABAR 86 - Secondary Device
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 Primary/Secondary combination is suitable for density-compen-
satedlevel measurement in an atmospherically open vessel
Keep the following in mind when setting up the measuring system:
•
Mount the Primary Device below the min. level
•
Mount the Secondary Device above the Primary Devices
•
Mount both sensors away from the filling stream and emptying and
protected against pressure shocks from the stirrer
Measurement setup