Cerabar S/Deltabar S/Deltapilot S FOUNDATION Fieldbus Parameter description (FF configuration program)
Endress+Hauser 59
Pos. Zero Adjust/
ZERO_POSITION_
ADJUST
Selection
Index: 38
Data type: unsigned8
Access: auto, OOS
Due to the orientation of the device, there may be a shift in the measured value, i.e. for
example, when the container is empty or partly filled, the Primary Value/PRIMARY_VALUE
parameter does not display zero.
This parameter provides the possibility of performing position adjustment where the pressure
difference between zero (set point) and the measured pressure need not be known.
(A reference pressure is present at the device.)
Example:
– Primary Value/PRIMARY_VALUE = 2.2 mbar (0.033 psi)
– Correct the Primary Value/PRIMARY_VALUE via the Pos.Zero Adjust/ZERO_POSITION_
ADJUST parameter with the "Confirm" option.
This means that you are assigning the value 0.0 to the pressure present.
– Primary Value/PRIMARY_VALUE (after pos. zero adjust) = 0.0 mbar
The Calib. Offset/CALIBRATION_OFFSET parameter (→ ä 59) displays the resulting
pressure difference (offset) by which the Primary Value/PRIMARY_VALUE was corrected.
Options:
• Abort
•Confirm
Factory setting:
0.0
Pos. Input Value/
POSITION_INPUT_
VALUE
Entry
Index: 39
Data type: float
Access: auto, OOS
Due to the orientation of the device, there may be a shift in the measured value, i.e. for
example, when the container is empty or partly filled, the PRIMARY_VALUE parameter does
not display zero or the desired value.
This parameter provides the possibility of performing position adjustment where the pressure
difference between zero (set point) and the measured pressure need not be known.
(A reference pressure is present at the device.)
Example:
– Primary Value/PRIMARY_VALUE = 0.5 mbar (0.0075 psi)
– For the Pos. Input Value/POSITION_INPUT_VALUE parameter, specify the desired set
point for the Primary Value/PRIMARY_VALUE, for example 2.0 mbar (0.03 psi).
(The following applies: PRIMARY_VALUE
new
= PRESSURE_1_ACCEPT_INSTALL
_OFFSET)
– Primary Value/PRIMARY_VALUE (after entry for Pos. Input Value/POSITION_INPUT_
VALUE) = 2.0 mbar
– The Calib. Offset/CALIBRATION_OFFSET parameter (→ ä 59) displays the resulting
pressure difference (offset) by which the PRIMARY_VALUE was corrected.
(The following applies: PRESSURE_1_INSTALL_OFFSET =
PRIMARY_VALUE
old
– PRESSURE_1_ACCEPT_INSTALL_OFFSET,
here: PRESSURE_1_INSTALL_OFFSET = 0.5 mbar (0.0075 psi) – 2.0 mbar (0.03 psi) = –
1.5 mbar (-0.0225 psi))
Factory setting:
0.0
Calib. Offset/
CALIBRATION_OFFSET
Entry
Index: 40
Data type: float
Access: auto, OOS
Due to the orientation of the device, there may be a shift in the measured value, i.e. for
example, when the container is empty or partly filled, the PRIMARY_VALUE parameter does
not display zero or the desired value.
This parameter provides the possibility of performing position adjustment where the pressure
difference between zero (set point) and the measured pressure is known.
(A reference pressure is not present at the device.)
Example:
– Primary Value/PRIMARY_VALUE = 2.2 mbar (0.033 psi)
– Via the Calib. Offset/CALIBRATION_OFFSET parameter, enter the value by which the
Primary Value/PRIMARY_VALUE should be corrected. To correct the Primary Value/
PRIMARY_VALUE to 0.0 mbar, you must enter the value 2.2 here.
(The following applies: PRIMARY_VALUE
new
=
PRIMARY_VALUE
old
– PRESSURE_1_INSTALL_OFFSET)
– Primary Value/PRIMARY_VALUE (after entry for calib. offset) = 0.0 mbar
Factory setting:
0.0
Pressure Transducer Block
Parameter Description
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