Endress+Hauser Cerabar M - Page 160

Commissioning with the FF configuration program Cerabar M, Deltabar M, Deltapilot M
160 Endress+Hauser
9.9.2 Semi-automatic entry of the linearization table
Example:
In this example, the volume in a tank with a conical outlet should be measured in m
3
.
Prerequisite:
• The tank can be filled or emptied. The linearization characteristic must rise continuously.
• The "Level" measuring mode has been selected. The Primary Value Type/
PRIMARY_VALUE_TYPE parameter is set to "Level" or "Level height".
For a description of the parameters mentioned  Chap. 8.11 "Description of parameters".
Error message F510 "Linearization" appears as long as the table is being entered and until
the table is activated.
Description
1 Open the Pressure Transducer Block and set the
block mode to OOS.
A0030032
2 Select the "Semi-auto. entry" option via the "Lin.
mode/LINEARIZATION_ TABLE_MODE" parameter.
3 By means of the Unit after lin./
AFTER_LINEARIZATION_UNIT parameter, select
the volume unit/mass unit, e.g. m
3
.
4 Fill the tank to the height of the 1st point.
5 By means of the Line numb./LINEARIZATION_
TABLE_INDEX parameter, enter the number of the
point in the table.
The actual level is displayed via the X-value:/
TB_LINEARIZATION_ TABLE_X_VALUE parameter.
Using the Y-value:/TB_LINEARIZATION_
TABLE_Y_VALUE parameter, enter the associated
volume value, here 0 m
3
for example, and confirm
the value.
6 Enter the next point as explained in Step 5.
7 Once all the points have been entered in the table,
select the "Activate table" option via the "Lin. mode/
LINEARIZATION_ TABLE_MODE" parameter.
8 Set the Pressure Transducer Block to the "Auto" block
mode.
9Result:
The measured value after linearization is displayed.
h
[m]
0
0 3.0
h
[m]
3.5
0
0 3.0
V
[m
3
]
V
[m
3
]