Level measurement
Cerabar S/Deltabar S/Deltapilot S 4...20mA HART
26
Hauser
5.4.2
Calibration without reference pressure – dry calibration
Example:
In this example, the volume in a tank should be measured in m
3
. The maximum volume is 5 m
3
and the maximum height 4 m (13 ft). The density of the fluid is 1 kg/dm
3
. 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 tank volume, tank height and density of the fluid are
known.
!
Note!
• See also Operating Instructions for Deltabar S (BA00270P) or Cerabar S (BA00271P), Section 6.5
"Level measurement" or Deltapilot S (BA00332P), Section 6.4 "Level measurement".
• Due to the orientation of the device, there may be a shift in the measured value, i.e. when the
container is empty or partly filled, the MEASURED VALUE parameter does not display zero.
To perform a position adjustment see also Page , Table 6: Position adjustment.
• For a description of the parameters mentioned, see
– Page 45, Table 2: MEASURING MODE
– Page 67, Table 10: BASIC SETUP
– Page 70, Table 11: BASIC SETUP – "Linear" level type.
• For a description of further relevant parameters, see
– Page 96, Table 16: EXTENDED SETUP
– Page 122, Table 26: PROCESS VALUES.
#
Warning!
If the measuring mode is changed, the span setting (URV) must be verified in the "Calibration"
"Basic Setup" operating menu and, if necessary, reconfigured.
Description
1
Select the "Level" measuring mode via the MEASURING
MODE parameter.
On-site display:
Menu path: GROUP SELECTION
MEASURING
MODE
Digital communication:
Menu path: OPERATING MENU
SETTINGS
BASIC SETUP
MEASURING MODE
P01-PMP75xxx-19-xx-xx-xx-003
Fig. 13:
Calibration without reference pressure –
dry calibration
1
See table, step 9.
2
See table, step 10.
3
See table, step 11.
4
See table, step 12.
2
If necessary, select "Level Standard" level mode using the
LEVEL SELECTION parameter.
On-site display:
Menu path: GROUP SELECTION
MEASURING
MODE "Level"
LEVEL SELECTION
Digital communication:
Menu path: OPERATING MENU
SETTINGS
BASIC SETUP
MEASURING MODE "Level"
LEVEL SELECTION
3
On-site display:
Select BASIC SETUP function group. Menu path:
GROUP SELECTION
OPERATING MENU
SETTINGS
BASIC SETUP
4 m
–0.5 m
➂
➃
➁
r
= 1
kg
dm
3
V = 5 m
3
➀