Endress+Hauser cerabar S - Level Measurement (FF Configuration Program); Overview of Level Measurement

Cerabar S/Deltabar S Level measurement (FF configuration program)
Endress+Hauser 7
4 Level measurement
(FF configuration program)
4. 1 Overview of level measurement
Measuring task Measured variable
selection
LEVEL_TYPE/
LEVEL MODE
Description Measured value display
The measured variable is in direct
proportion to the measured
pressure.
– % (level)
– Level
–Volume
–Mass
Linear Calibration without reference
pressure – dry calibration, see
Page 8, Section 4.2.1
The measured value display and
the PRIMARY_VALUE and
MEASURED_LEVEL_AFTER_
SIMULATION/LEVEL BEFORE
LIN. parameters show the
measured value.
The measured variable is not in
direct proportion to the measured
pressure as, for example, with
containers with a conical outlet.
A linearisation table must be
entered for the calibration.
– Pressure and %
– Pressure and volume
– Pressure and mass
Pressure linearized – Calibration with reference
pressure: semiautomatic entry
of linearisation table, see
Page 10, Section 4.3.1
– Calibration without reference
pressure: manual entry of
linearisation table, see Page 12,
Section 4.3.2
The measured value display and
the PRIMARY_VALUE parameter
display the measured value.
– Two measured variables are
required or
– The container shape is given
by value pairs, such as height
and volume.
The 1st measured variable %-
height or height must be in direct
proportion to the measured
pressure. The 2nd measured
variable volume, mass or % must
not be in direct proportion to the
measured pressure. A
linearisation table must be
entered for the 2nd measured
variable. The 2nd measured
variable is assigned to the 1st
measured variable by means of
this table.
– Height and volume
– Height and mass
– Height and %
–%-height and volume
–%-height and mass
–%-height and %
Height linearized – Calibration without reference
pressure: dry calibration and
manual entry of linearisation
table, see Page 14, Section
4.4.1
The measured value display and
the PRIMARY_VALUE parameter
display the 2nd measured value
(volume, mass or %).
The MEASURED_LEVEL_
AFTER_SIMULATION/LEVEL
BEFORE LIN parameter displays
the 1st measured value (% height
or height).