Cerabar M, Deltabar M, Deltapilot M Commissioning with the FF configuration program
Endress+Hauser 149
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 corresponds to a pressure of 450 mbar. The minimum volume of 0 liters
corresponds to a pressure of 50 mbar since the device is mounted below the level lower-
range value.
Prerequisite:
• The measured variable is in direct proportion to the pressure.
• This is a theoretical calibration i.e. the pressure and volume values for the lower and upper
calibration point must be known.
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.
A0030030
Fig. 42: Calibration without reference pressure –
dry calibration
A See Table, Step 9.
B See Table, Step 8.
2 Open the Pressure Transducer Block and set the
block
mode to OOS.
B
1000 l
450 mbar
A
0 l
50 mbar
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