Endress+Hauser Deltapilot M FMB51 - Page 42

Commissioning Deltapilot M 4...20 mA HART
42 Endress+Hauser
• This is a theoretical calibration i.e. the pressure and volume values for the lower and upper
calibration point must be known.
• The values entered for "Empty calib./Full calib.", "Empty pressure/Full pressure" and "Set
LRV/Set URV" must be at least 1% apart. 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 for the measuring
device to be able to measure correctly.
• Due to the orientation of the device, there may be pressure shifts in the measured value, i.e.
when the container is empty or partly filled, the measured value is not zero. For information
on how to perform position adjustment, see  ä 37, "Position zero adjustment".
Description
1 Select the "Level" measuring mode via the
"Measuring mode" parameter.
Menu path: Setup Measuring mode
A0030030
Fig. 12: Calibration without reference pressure –
dry calibration
A See Table, Steps 6 and 7.
B See Table, Steps 8 and 9.
2 Select the "In pressure" level mode via the "Level
selection" parameter.
Menu path: Setup  Extended setup  Level 
Level selection
3 Select a pressure unit via the "Press eng. unit"
parameter, here "mbar" for example.
Menu path: Setup  Press. eng. unit
4 Select a level unit via the "Unit before lin" parameter,
here "l" (liters) for example.
Menu path: Setup  Extended setup  Level 
Unit before lin
5 Select the "Dry" option via the "Calibration mode"
parameter.
Menu path: Setup  Extended setup  Level 
Calibration mode
6 Enter the volume value for the lower calibration
point via the "Empty calib." parameter, here 0 liters
for example.
Menu path: Setup  Extended setup  Level 
Empty calib.
B
1000 l
450 mbar
A
0 l
50 mbar
r=1
g
cm
3