Cerabar S/Deltabar S/Deltapilot S FOUNDATION Fieldbus Level measurement (FF configuration program)
Endress+Hauser 23
5.4 "Level standard" level selection, "Linear" level mode
5.4.1 Calibration with reference pressure – wet calibration
Example:
In this example, the level in a tank should be measured in m. The maximum level
is 3 m (9.8 ft). The pressure range is set to 0-300 mbar (4.5 psi).
Prerequisite:
• The measured variable is in direct proportion to the pressure.
• The tank can be filled and emptied.
!
Note!
• See also Operating Instructions BA00301P for Deltabar S or Operating Instructions BA00302P for
Cerabar S or Operating Instructions BA00372P for Deltapilot S, "Level measurement" section.
• For a description of the parameters mentioned, see
– → ä 53, Pressure Transducer Block
– → ä 93, Analog Input Block.
Description
1 Deltabar S: Before configuring the device for your
application, the pressure piping must be cleaned and the
device filled with fluid. See Operating Instructions
BA00301P.
P01-PMP75xxx-19-xx-xx-xx-008
Fig. 9: Calibration without reference pressure –
dry calibration
1 See Table, Step 11.
2 See Table, Step 13.
2 Open the Pressure Transducer Block and set the block
mode to OOS.
3 The following options are available for performing
position adjustment:
• By means of the parameters
– Pos.Zero Adjust/ZERO_POSITION_ADJUST
(→ ä 59) or
– Pos. Input Value/POSITION_INPUT_VALUE
(→ ä 59) or
– Calib. Offset/CALIBRATION_OFFSET (→ ä 59).
4 Select the measuring mode if necessary:
• Select the "No linearization" option by means of the
Linearization/LINEARIZATION parameter.
• By means of the Primary Value Type/
PRIMARY_VALUE_TYPE parameter, select the
"Level" option.
5 Select the "LEVEL standard" option by means of the
Level Selection/LEVEL_SELECTION parameter.
6 Select the "Linear" option by means of the Level mode/
LEVEL_MODE parameter.
7 Select the "Level" option by means of the Lin.
measurand/LINEAR_MEASURAND parameter.
8 By means of the Scale Out/SCALE OUT "Units Index"
parameter, select the "m" option.
Or by means of the Unit Height/HEIGHT_UNIT
parameter, select a height unit, here "m" for example.
9 By means of the Calibration mode/CALIBRATION_
MODE parameter, select the "Wet" option. See also
Point 3 in the following note.
10 Fill the container up to the lower level point.
The related pressure value can be viewed via the
Pressure/PRESSURE parameter.
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