Endress+Hauser Deltapilot M FMB51 - 6.5.7 Calibration With Partially-Filled Tank

Commissioning Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART
66 Endress+Hauser
6.5.7 Calibration with partially-filled tank (wet calibration)
Example:
In this example a wet calibration is shown when it is not possible to empty the vessel and then fill
it up to 100%. Here a 20% filling is used as “Empty” and a “25%” filling is used as “Full” calibration
point. The calibration is then extended to 0% ... 100% and LRV / URV are adjusted accordingly.
Prerequisite:
The default value in the level mode for calibration mode is “Wet”.
However, it can be changed via: Setup  Extended Setup  Level  Calibration mode
!
Note!
It is also possible to use different liquids (e.g. water) for the adjustment. In this case you have to
enter the different densities at following menu path:
•Setup  Ext. Setup  Level  Adjust density (034) (e.g. 1.0 kg/l for water)
•Setup  Ext. Setup  Level  Process density (035) (e.g. 0.8 kg/l for oil)
Description
1 Select the "Level" measuring mode via the "Measuring
mode (005)" parameter.
Menu path: Setup Measuring mode (005)
P01-Mxxxxxxx-19-xx-xx-xx-007
Fig. 35: Calibration with partially-filled tank
1 See Table, Step 2
2 See Table, Step 3
2 Set value for "Empty calib." with acting pressure for
Level e.g. 20%.
Menu path: Setup  Extended Setup  Level  Empty
calibration
3 Set value for "Full calib." with acting pressure for Level
e.g. 25%.
Menu path: Setup  Extended Setup  Level  Full
calibration
4 The values for full and empty pressure are measured
automatically at adjustment.
As the transmitter automatically sets the pressure values
that suit to empty and full calibration to min and max
pressure that cause the output current, it is necessary to
set the right upper range value (URV) and lower range
value (LRV).
20%
20%
1
25%
2