Cerabar S/Deltabar S/Deltapilot S FOUNDATION Fieldbus Level measurement (FF configuration program)
Endress+Hauser 21
5.3.2 Calibration without reference pressure – dry calibration
Example:
In this example, the volume in a tank should be measured in liters. The maximum volume of
1000 liters (264 US gal) corresponds to a level of 4.5 m (15 ft). The minimum volume of 0 liters
corresponds to a level of 0.5 m (1.6 ft) since the device is mounted below the level lower-range
value. The density of the fluid is 1 kg/dm
3
.
Prerequisite:
• The measured variable is in direct proportion to the pressure.
• This is a theoretical calibration i.e. the height and volume values for the lower and upper
calibration point must be known.
!
Note!
• See also Operating Instructions for Deltabar S (BA00301P) or Cerabar S (BA00302P), "Level
measurement" section or Deltapilot S (BA00372P), "Level measurement" section.
• For the "Level easy pressure" level mode, the values entered for Empty Calib. Level Easy/
EMPTY_CALIBRATION_EASY and Full Calib. Level Easy/FULL_ CALIBRATION_EASY must be
at least 1 % apart. The value will be rejected with a warning message if the values are too close
together. Further limit values are not checked; i.e. the values entered must be appropriate for the
sensor and the measuring task so that the measuring device can measure correctly.
• Due to the orientation of the device, there may be a shift in the measured value, i.e. when the
container is empty, the MEASURED VALUE parameter does not display zero.
→ For information on how to perform position adjustment, see also → ä 59,
"Pos. Zero Adjust/ZERO_POSITION_ ADJUST".
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-PMC71xxx-19-xx-xx-xx-009
Fig. 7: Calibration without reference pressure –
dry calibration
1 See Table, Step 10.
2 See Table, Steps 12 and 13.
3 See Table, Steps 14 and 15.
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).
1000 l
0.5 m
4.5 m
0l
r =1
kg
dm
3
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