Commissioning
Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART
64
Hauser
6.5.6
"In height" level selection
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 start of the level
measuring range.
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!
• The values for "Empty calib./Full calib.", "Empty height/Full height" 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
56, "Position zero adjustment".
Description
1
Select the "Level" measuring mode via the "Measuring
mode" parameter.
Menu path: Setup
Measuring mode
P01-Mxxxxxxx-19-xx-xx-xx-007
Fig. 33:
Calibration without reference pressure –
dry calibration
1
See Table, Step 11.
2
See Table, Steps 7 and 8.
3
See Table, Steps 9 and 10.
2
Select a pressure unit via the "Press eng. unit" parameter,
here "mbar" for example.
Menu path: Setup
Press. eng. unit
3
Select the "In height" level mode via the "Level selection"
parameter.
Menu path: Setup
Extended setup
Level
Level
selection
4
Select a level unit via the "Output unit" parameter, here
"l" (liters) for example.
Menu path: Setup
Extended setup
Level
Output unit
5
Select a level unit via the "Height unit" parameter, here
"m" for example.
Menu path: Setup
Extended setup
Level
Height
unit
6
Select the "Dry" option via the "Calibration mode"
parameter.
Menu path: Setup
Extended setup
Level
Calibration mode
1000 l
0,5 m
4,5 m
0 l
r
= 1
g
cm
3
1
3
2
