Level measurement
Cerabar S/Deltabar S/Deltapilot S 4...20mA HART
32
Hauser
!
Note!
1.
For this level type, the measured variables %, volume and mass are available.
See Page 78 ff.
2.
You can also specify customer-specific units. See parameter description for PRESS. ENG. UNIT
(
Page 79), UNIT VOLUME (
Page 79) and MASS UNIT
(
Page 80).
3.
Once you have selected the "Pressure Linearized" level type, the warning message "W710 Set
span too small. Not allowed." can appear. At this stage the linearisation table already consists
of two points as standard. It could be the case that the 2nd value, and thus the highest X-VAL.
of the linearisation table, is smaller than the minimum span permitted (
MINIMUM SPAN,
Page 119). The message goes out as soon as the highest X-VAL. is larger than the minimum
span.
4.
A level value is assigned to both the lower and upper current value with the SET LRV
(
Page 98) and SET URV (
Page 98) parameters. If you enter values for TANK CONTENT
MIN (
Page 101 or 104) and TANK CONTENT MAX (
Page 101 or 105), the SET LRV
and SET URV parameters are also changed. If you want to assign values other than those for
TANK CONTENT MIN and TANK CONTENT MAX to the lower and upper current values,
the desired values must be entered for SET LRV and SET URV.
5
On-site display:
Select the "Editor table" option by means of the TABLE
SELECTION parameter.
P01-xxxxxxxx-05-xx-xx-xx-015
P01-xxxxxxxx-05-xx-xx-xx-016
Fig. 16:
Manual entry of the linearisation table
1
See Section 5.3.1, table, step 9.
2
See Section 5.3.1, table, step 10.
3
See table, step 3.
4
See table, step 4.
5
See table, steps 5 – 9.
6
See the following note, point 4.
7
See the following note, point 4.
6
Select the "Manual" option by means of the LIN. EDIT
MODE parameter.
7
Select the "New table" option by means of the EDITOR
TABLE parameter.
8
Enter linearisation table (min. 2 points, max. 32 points).
LINE-NUMB: confirm value displayed.
X-VAL.: enter the pressure value and confirm.
Y-VAL.: enter the volume value, here 0 m
3
for example,
and confirm.
9
On-site display
If you want to enter another point for the linearisation
table, select the "Next point" option and enter the point
as described in step 8.
If you want to finish entering the values and activate the
linearisation table, select the "Accept input table" option.
Digital communication:
You can enter further points for the linearisation table as
explained in step 8. Once all the points have been
entered, the table must be activated by means of the
TAB. ACTIVATE parameter.
10
Result:
The linearisation table has been entered.
Description
➀
3.5
0
0
350
V
[m ]
3
p
[mbar]
➂
➁
➃
➄
20
4
I
[mA]
0
3.5
V
[m ]
3
➆
➅