Page 88 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL 7ML19985JB02
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H: Parameters
Entering head level and flow breakpoints in PDM:
a. First go to Linearization > PV (volume/level) units, and select the
desired units to be used for flow.
b. The default for head level values is percent: if you want to select
units instead, go to Input > Sensor Calibration > Unit (level), and
select the desired unit.
c. Go to > Linearization/Tank Shape, and select Linearization table
option.
d. Go to Detailed Setup > Volume.
e. In Level 1, enter a head level value for breakpoint 1 (point 1 should
always be 0).
f. In Volume 1, enter the corresponding flow value for breakpoint 1
(point 1 should always be 0).
g. Repeat steps c and d, until values have been entered for all the
required breakpoints. The highest head and flow level should
correspond to the maximum head setting or 2.4.7 (High Level Pt).
Example: v-notch weir:
Note: Changing 2.4.7 (High Level Point) after programming the head/flow points will
change the head setting and proportionally increase or decrease the flow values at the
new head setting.
Note: Illustrated breakpoint values are for example purposes only.
4
Breakpoints
3
2
Break-
point
Head
(level)
Flow
(volume)
4 0.4 m 113.5
3 0.3 m 55.3
2 0.2 m 20.07
10 m 0
1
flow characterization
4
2
1
3
42
1
3
head
flow
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