Cerabar M, Deltapilot M
Commissioning
Hauser
55
Description
12
If the process uses a different medium to the medium on which the calibration was based,
the new density must be specified in the "Process density" parameter.
Menu path: Setup → Extended setup → Level → Process density.
13
Result:
The measuring range is configured for 0 to 3 m (0 to 9.8 ft).
In this level mode, you can choose from the measured variables %, level, volume and
mass, see the "Unit output" → 78.
8.5.4
"In pressure" 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 1
000 l (264 gal) corresponds to a pressure of 450 mbar (6.75 psi).
The minimum volume of 0 liters corresponds to a pressure of 50 mbar (0.75 psi) 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 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 mes-
sage displayed, if the values are too close together. Other limit values are not
checked; i.e. the values entered must be suitable 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 pressure shifts in the measured
value, i.e. when the vessel is empty or partly filled, the measured value is not zero.
For information on how to perform position adjustment, see → 52.
Description
1
Select the "Level" measuring mode via the "Measuring mode" parameter.
Menu path: Setup → Measuring mode
L
WARNING
Changing the measuring mode affects the span (URV)
This situation can result in product overflow.
‣
If the measuring mode is changed, the setting for the span (URV) must be checked in
the "Setup" operating menu and readjusted if necessary.
B
1000 l
450 mbar
A
0 l
50 mbar
r =
1
g
cm
3
A0030030
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 volume unit via the "Unit output" parameter, here "l" (liters) for example.
Menu path: Setup → Extended setup → Level → Unit output
5
Select the "Dry" option via the "Calibration mode" parameter.
Menu path: Setup → Extended setup → Level → Calibration mode
Содержание Cerabar M
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