Endress+Hauser Cerabar M - Page 184

Commissioning with the FF configuration program Cerabar M, Deltabar M, Deltapilot M
184 Endress+Hauser
Damping/
PRESSURE_1_DAMPING
Entry
Index: 37
Data type: float
Access: OOS
Enter damping time (time constant ).
The damping affects the speed at which all subsequent elements, such as the
local operation, measured value (Primary Value) and output value of the Analog
Input Block react to a change in the pressure. For this purpose, switch the
damping switch "On".
Input range:
0.0 to 999.0 s
Factory setting:
2.0 s or as per order specifications
Pos. zero adjust/
PRESSURE_1_ACCEPT_ZERO
_INSTALL
Options
Index: 38
Data type: unsigned8
Access: 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 partially full, 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
– Correct the Primary Value/PRIMARY_VALUE via the Pos. zero adjust/
PRESSURE_1_ACCEPT_ZERO_INSTALL 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/PRESSURE_1_INSTALL_OFFSET ( ä 184) parameter
displays the resulting pressure difference (offset) by which the Primary Value/
PRIMARY_VALUE was corrected.
Options:
•Abort
•Confirm
Factory setting:
Abort
Calib. offset/
PRESSURE_1_INSTALL_OFFS
ET
Entry
Index: 39
Data type: float
Access: 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
– Via the Calib. offset/PRESSURE_1_INSTALL_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_INSTALL_OFFSET)
– Primary Value/PRIMARY_VALUE (after entry for calib. offset) = 0.0 mbar
Factory setting:
0.0
Lo trim measured/
PRESSURE_1_LOWER_CAL_
MEASURED
Display
Index: 40
Data type: float
Access: read only
Displays the pressure that was present at the device during calibration and was
used for the calibration of the lower point of the sensor characteristic curve. 
See also the Lo trim sensor/CAL_POINT_LO parameter description ( ä 179).
Hi trim measured/
PRESSURE_1_UPPER_CAL_M
EASURED
Display
Index: 41
Data type: float
Access: read only
Displays the pressure that was present at the device during calibration and was
used for the calibration of the upper point of the sensor characteristic curve. 
See also the Hi Trim Sensor/CAL_POINT_HI parameter description ( ä 179).
Pressure Transducer Block (Endress+Hauser parameters)
Parameter Description