Reference Manual
300550EN, Rev AA
December 2010
5-7
Rosemount 2240S
Section 5. Configuration/Operation
5.3.3
Water Level Sensor Measuring Range
Reference Points
The WLS has two reference points, the Upper Reference Point and the Water
Zero Level, which are marked on the probe. The positions of the Upper
Reference Point and Water Zero Level are given in Figure 5-4 below:
Figure 5-4. Tank geometry for
the water level sensor
Level Offset
The Level Offset
X
between the
Tank Zero Level
and the
Water Zero Level
has to be considered when the WLS is configured. X can be calculated from
known tank distances as illustrated in Figure 5-4.
Tank Zero Level
Tank Reference Point
Upper Reference Point
Water Zero Level
Upper Sensor Limit (100%)
Lower Sensor Limit (0%)
Mark
Level offset
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