Cerabar M, Deltabar M, Deltapilot M Commissioning with the FF configuration program
Endress+Hauser 151
9.7.4 "In height" level selection
Calibration with reference pressure – wet calibration
Example:
In this example, the volume in a tank should be measured in liters. The maximum volume of
1000 liters corresponds to a level of 4.5 m. The minimum volume of 0 liters corresponds to
a level of 0.5 m since the device is mounted below the level lower-range value. The density
of the medium is 1 g/cm
3
.
Prerequisite:
• The measured variable is in direct proportion to the pressure.
• The tank can be filled and emptied.
Note Dependencies when setting parameters!
‣ The values entered for Empty calibration/LOW_LEVEL_EASY and Full calib./
HIGH_LEVEL_EASY must be at least 1% apart for the "Level easy pressure" level mode.
The value will be rejected, and a warning message displayed, 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 Primary Value/PRIMARY_VALUE parameter does not display
zero.
For information on how to perform position adjustment, see also ä 144,
"Pos. zero adjust/PRESSURE_1_ACCEPT_ZERO_INSTALL".
Description
1 Deltabar M: Before configuring the device for your
application, the pressure piping must be cleaned and
filled with medium.
A0031027
Fig. 44: Calibration with reference pressure - wet
calibration
A See Table, step 8.
B See Table, step 10.
C See Table, step 12.
2 Open the Pressure Transducer Block and set the
block
mode to OOS.
3 Select the measuring mode if necessary:
Select the "Level height" option via the Primary Value
Type/PRIMARY_VALUE_TYPE parameter. Or:
4 Select the "Level" measuring mode via the Measuring
mode/OPERATING_MODE parameter.
Select the "In height" option via the Level selection/
LEVEL_ADJUSTMENT parameter.
5 Select the "l" (liter) option via the "Units index" Scale
Out/SCALE_OUT parameter, or select a volume unit
via the Unit before Lin./OUT_UNIT_EASY
parameter, here "l" for example.
6 Select a height unit by means of the Height unit/
HEIGHT_UNIT_EASY parameter, here "m" for
example.
7 Select the "Wet" option by means of the Calibration
mode/LEVEL_ADJUST_MODE_EASY parameter.
8 Enter a density by means of the Adjust density/
LEVEL_ADJUST_DENSITY_EASY parameter, here
"1" g/cm
3
for example.
9 Fill the container up to the lower level point.
The associated level value can be viewed by means of
the Meas. level/
MEASURED_ACTUAL_LEVEL_EASY parameter.
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