User's Manual

Parameter reference
SITRANS LR250 (HART)
Operating Instructions, 01/2014, A5E32220602-AB
129
Table 1-8 (2.7.2.)
Note
Linearization Table must be selected in Vessel Shape (2.7.1.1.)
in order for level/volume
values to be transferred.
If your vessel shape is more complex than any of the preconfigured shapes, you can define the
shape as a series of segments. A value is assigned to each level breakpoint and a
corresponding value is assigned to each volume breakpoint. Level values are defined in
Units
(2.2.1.).
Volume units are defined by the user but are not explicitly stated in the SITRANS
LR250.
Level Values
Range:
0.0
to
span
Span = High Calibration Pt. (2.3.2.) - Low Calibration Pt. (2.3.1.)
Default: 0.0
Volume Values
Range:
0.0
to
Maximum Volume (2.7.1.2.)
Default: 0.0
Enter up to 32 level breakpoints, where the corresponding volume is known. The values
corresponding to 100% and 0% levels must be entered. The breakpoints can be ordered from
top to bottom, or the reverse.
Breakpoints are grouped into four tables: Table 1-8, Table 9-16, Table 17-24, and Table 25-32.
Entering breakpoints via the handheld programmer:
1. The default unit for level values is
m:
to change it navigate to
Setup (2.) > Sensor (2.2.) >
Units(2.2.1.)
, and select the desired unit.
2. Navigate to
Setup (2.) > Linearization (2.7.) > Maximum Volume (2.7.1.2.)
, and enter the
value.
3. Go to the appropriate table for the particular breakpoint you wish to adjust: for example, go to
Table 1-8 for breakpoint 1.
4. Under Table 1-8, go to
Level 1 (2.7.2.1.)
to enter the level value for the breakpoint 1.
5. Under Table 1-8, go to
Volume 1 (2.7.2.2.)
to enter the volume value for the breakpoint 1.
6. Repeat steps 3 to 5, until values have been entered for all required breakpoints.
Level 1 (2.7.2.1.)
1. Press
RIGHT arrow
to open Edit mode.
2. Enter level value and press
RIGHT arrow
to except it.
3. Press
DOWN arrow
to move to corresponding volume breakpoint.