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7.5
Reading index
The tape reading at the height of the reading
index of the instrument is indicating the distance
between the reaction point and the reading index.
If the instrument is installed in such a way that the
reading index is at the same level as the zero-
ullage reference level the reading of the tape
corresponds to the ullage providing the reaction
50461/GTEX MMC/1111
Zero ullage
Reference level of tank
Liquid level
Reaction point
Figure 7-9
point of the sensing probe is positioned at the
liquid level.
If the reading index is positioned below or above
the reference level a positive or negative
correction of the tape reading is necessary.
See also chapter 8 "Examples of installation of the
gauging system".
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UTImeter Gtex MMC
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