Cerabar S/Deltabar S/Deltapilot S FOUNDATION Fieldbus Level measurement (via local operation and FieldCare)
Endress+Hauser 105
9 Level measurement (via local operation and
FieldCare)
9.1 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→ ä 106,
Section 9.2.1
– Calibration without
reference pressure – dry
calibration, see → ä 108,
Section 9.2.2
– Incorrect entries are
possible
– Customized units are
not possible
The measured value
display and the LEVEL
BEFORE LIN. parameter
display 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 → ä 110,
Section 9.3.1
– Calibration without
reference pressure – dry
calibration, see → ä 112,
Section 9.3.2
– Incorrect entries are
possible
– Customized units are
not possible
The measured value
display and the LEVEL
BEFORE LIN. parameter
display 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 → ä 114,
Section 9.4.1
– Calibration without
reference pressure – dry
calibration, see → ä 116,
Section 9.4.2
– Incorrect entries are
rejected by the device
– Customized level,
volume and mass
units are possible
The measured value
display and the LEVEL
BEFORE LIN. parameter
display the measured
value.
The measured variable is
not in direct proportion to
the measured pressure as
is the case with tanks with
a conical outlet, for
example. A linearization
table has to be entered for
the calibration.
LEVEL SELECTION:
Level standard/
LEVEL MODE:
Pressure linearized
Via LINd
MEASURAND
parameter:
– Pressure + %
– Pressure +
volume
– Pressure + mass
– Calibration with reference
pressure: semiautomatic
entry of linearization table,
see → ä 118,
Section 9.5.1
– Calibration without
reference pressure: manual
entry of linearization table,
see → ä 121,
Section 9.5.2.
– Incorrect entries are
rejected by the device
– Customized 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 linearization 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:
–Height + volume
–Height + mass
–Height + %
– %-height +
volume
– %-height + mass
– %-height + %
– Calibration with reference
pressure: wet calibration
and semiautomatic entry of
linearization table, see
→ ä 124, Section 9.6.1
– Calibration without
reference pressure: dry
calibration and manual
entry of linearization table,
see → ä 127,
Section 9.6.2.
– Incorrect entries are
rejected by the device
– Customized 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).
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