Measurement Setup For Density Compensated Level Measurement - KROHNE OPTIBAR PM 5060 C Manuel De Référence

OPTIBAR PM 5060 C

3.15.5 Measurement setup for density compensated level measurement

The master-slave combination is suitable for density compensated level measurement. Note the
following information regarding measurement setup:
• Install the master sensor below the minimum level
• Install the slave sensor above the master sensor
• Install both sensors away from the filling stream and emptying and protected against
pressure shocks from the stirrer.
The mounting distance h of the two sensors should be at least 10%, preferably 20%, of the final
value of the sensor measuring range. A greater distance increases the accuracy of the density
compensation.
The density compensated level measurement starts with the stored density 1 kg/dm
both sensors are covered, this value will be replaced by the calculated density. Density
compensation means that the level value in height units and the adjustment values do not
change in case of a fluctuating density.
Density compensated level measurement is only possible when the tank is open, in other words
unpressurised.
Figure 3-17: Measurement setup for density compensated level measurement, h = distance between the two
measuring points
1 Slave sensor
2 Shielded four-wire cable
3 Master sensor
4 Power supply
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