Level measurement
Cerabar S/Deltabar S/Deltapilot S 4...20mA HART
14
Hauser
5
Level measurement
5.1
Overview of level measurement
Measuring task
LEVEL
SELECTION/
LEVEL MODE
Measured
variable options
Description
Comment
Measured value display
The measured variable is
in direct proportion to the
measured pressure.
Calibration is performed
by entering two pressure-
level value pairs.
LEVEL SELECTION:
Level Easy Pressure
Via OUTPUT UNIT
parameter: %, level,
volume or mass
units.
– Calibration with
reference pressure –
wet calibration, see
Page 15, Section 5.2.1
– Calibration without
reference pressure – dry
calibration, see Page 17,
Section 5.2.2
– Incorrect entries are
possible
– SIL mode possible
– Customised units are
not possible
The measured value display
and the LEVEL BEFORE
LIN parameter show the
measured value.
The measured variable is
in direct proportion to the
measured pressure.
Calibration is performed
by entering the density
and two height-level value
pairs.
LEVEL SELECTION:
Level Easy Height
Via OUTPUT UNIT
parameter: %, level,
volume or mass
units.
– Calibration with
reference pressure –
wet calibration, see
Page 19, Section 5.3.1
– Calibration without
reference pressure – dry
calibration, see Page 22,
Section 5.3.2
– Incorrect entries are
possible
– SIL mode not possible
– Customised units are
not possible
The measured value display
and the LEVEL BEFORE
LIN parameter show the
measured value.
The measured variable is
in direct proportion to the
measured pressure.
LEVEL SELECTION:
Level standard/
LEVEL MODE:
Linear
Via LIN.
MEASURAND
parameter:
– % (Level)
– Level
– Volume
– Mass
– Calibration with
reference pressure –
wet calibration, see
Page 24, Section 5.4.1
– Calibration without
reference pressure – dry
calibration, see Page 26,
Section 5.4.2
– Incorrect entries are
rejected by the device
– SIL mode not possible
– Customised level,
volume and mass units
are possible
The measured value display
and the LEVEL BEFORE
LIN parameter 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.
LEVEL SELECTION:
Level standard/
LEVEL MODE:
Pressure Linearized
Via LINd
MEASURAND
parameter:
– Pr %
– Pr
Volume
– Pr Mass
– Calibration with
reference pressure:
semiautomatic entry of
linearisation table, see
Page 28, Section 5.5.1
– Calibration without
reference pressure:
manual entry of
linearisation table, see
Page 31, Section 5.5.2
– Incorrect entries are
rejected by the device
– SIL mode not possible
– Customised level,
volume and mass units
are possible
The measured value display
and the TANK CONTENT
parameter show 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.
LEVEL SELECTION:
Level standard/
LEVEL MODE:
Height Linearized
Via COMB.
MEASURAND
parameter:
– Volume
– Mass
– %
– %-
Volume
– %- Mass
– %- %
– Calibration with
reference pressure: wet
calibration and
semiautomatic entry of
linearisation table, see
Page 33, Section 5.6.1
– Calibration without
reference pressure: dry
calibration and manual
entry of linearisation
table, see Page 37,
Section 5.6.2
– Incorrect entries are
rejected by the device
– SIL mode not possible
– Customised level,
volume and mass units
are possible
The measured value display
and the TANK CONTENT
parameter show the 2nd
measured value (volume,
mass or %).
The LEVEL BEFORE LIN
parameter displays the 1st
measured value (%-height
or height).