Level measurement
Cerabar S/Deltabar S/Deltapilot S 4...20mA HART
38
Hauser
!
Note!
1.
For this level type, the measured variables " %", " Volume", " Mass",
"%- %", "%- Volume" and "%- Mass" are available.
See Page 79 ff.
2.
You can also specify customer-specific units. See parameter description for PRESS. ENG. UNIT
(
Page 83), UNIT VOLUME (
Page 84) and MASS UNIT
(
Page 85).
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.
Perform linearisation (calibration for the 2nd
measured variable)
P01-xxxxxxxx-05-xx-xx-xx-018
P01-xxxxxxxx-05-xx-xx-xx-019
Fig. 19:
Calibrating the 2nd measured variable
5
See table, step 7.
6
See table, step 8.
7
See table, steps 9 – 13.
8
See the following note, point 4.
9
See the following note, point 4.
6
Change the function group.
Menu path: (GROUP SELECTION
) OPERATING
MENU
SETTINGS
LINEARISATION
7
Select TANK CONTENT MIN parameter.
Specify the minimum tank contents to be expected, here
0 m
3
for example.
8
Select TANK CONTENT MAX parameter.
Specify the maximum tank contents to be expected, here
5 m
3
for example.
9
On-site display:
Select the "Editor table" option by means of the TABLE
SELECTION parameter.
10
Select the "Manual" option by means of the LIN. EDIT
MODE parameter.
11
Select the "New table" option by means of the EDITOR
TABLE parameter.
12
Enter linearisation table (min. 2 points, max. 32 points).
LINE-NUMB: confirm value displayed.
X-VAL.: enter the height value and confirm.
Y-VAL.: enter the volume value, here 0 m
3
for example,
and confirm.
13
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 12.
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 12. Once all the points have been
entered, the table must be activated by means of the
TAB. ACTIVATE parameter.
14
Result:
– The linearisation table has been entered.
– The measured value display and the
TANK CONTENT parameter display the 2nd
measured value (here the volume).
– The LEVEL BEFORE LIN parameter displays the 1st
measured value (here the height). See also the
following note, point 5.
Description
5
0
0
3
V
[m ]
3
h
[m]
➄
➆
➅
20
4
I
[mA]
0
5
V
[m ]
3
➈
➇
