Cerabar S/Deltabar S/Deltapilot S FOUNDATION Fieldbus Level measurement (FF configuration program)
Endress+Hauser 29
!
Note!
1. For this level mode, the measured variables %, volume and mass are available. → ä 61 ff.
2. You can also specify customer-specific units. See parameter description for Calibration Units/
CAL_UNIT (→ ä 54), Height Unit/HEIGHT_UNIT (→ ä 62), Unit Volume/
VOLUME_UNIT (→ ä 64) and Mass Unit/MASS_UNIT (→ ä 65).
3. Once you have selected the "Pressure linearized" level mode (LEVEL_TYPE), the warning
message "W710 Set span too small. Not allowed." can appear. At this stage, the linearization
table already consists of two points as standard. It could be the case that the 2nd value, and
thus the highest X-value of the linearization table, is smaller than the minimum span permitted
(→ Calibration Minimum Span/CAL_MIN_SPAN, → ä 54). The message disappears as soon
as the highest X-value is greater than the minimum span and the table entered is active.
4. Once you have entered the maximum tank contents to be expected for Scale Out/
SCALE_OUT, EU_100 element, the alarm "A719 Y-Val of lin. table out of edit limits" can
appear. At this stage, the linearization table already consists of two points as standard. It could
be the case that the 2nd value, and thus the highest Y-value of the linearization table, is greater
than the value entered for Scale Out/SCALE_OUT, EU_100 element. The message disappears
as soon as no Y_value is greater than the value for Scale Out/SCALE_OUT, EU_100 element
and the table entered is active.
5.5.2 Manual 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:
• This is a theoretical calibration, i.e. the points for the linearization table are known.
• A minimum gap of 0.5 % of the distance between two points must be maintained. Spans for the
"Pressure linearized" option: HYDR. PRESS MAX. – HYDR. PRESS MIN.; TANK CONTENT
MAX. – TANK CONTENT MIN. Spans for the "Height linearized" option: LEVEL MAX – LEVEL
MIN; TANK CONTENT MAX. – TANK CONTENT MIN.
!
Note!
• See also Operating Instructions BA00301P for Deltabar S or Operating Instructions BA00302P for
Cerabar S or Operating Instructions BA00372P for Deltapilot S, "Level measurement" section.
• For a description of the parameters mentioned, see
– → ä 53, Pressure Transducer Block.
– → ä 93, Analog Input Block
Description
1 Perform calibration as per Section 5.5.1, Steps 1 to 10.
P01-PMP75xxx-19-xx-xx-xx-002
Carry out linearization:
2 Select the Scale Out/SCALE_OUT parameter, EU_0
element.
Specify the minimum tank contents to be expected, here
0 m
3
for example.
3 Select the Scale Out/SCALE_OUT parameter, EU_100
element.
Specify the maximum tank contents to be expected, here
3.5 m
3
for example. See also Point 3 in the following
note.
4 By means of the Lin. Edit Mode/LINEARIZATION_
EDIT_MODE parameter, select the "Manual" option.
5 By means of the Table Selection/LINEARIZATION_
TABLE_SELECTION parameter, select the "Edit table"
option.
To Next Page
Loading...
