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Emerson Tank Gauging System

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Rosemount Raptor<br />

System Configuration Manual<br />

300510EN, Rev AA<br />

December 2010<br />

ATP (Amplitude<br />

Threshold Points)<br />

A weak disturbing echo can be filtered out by<br />

creating a curve of Amplitude Threshold<br />

Points.<br />

Disturbing<br />

Echo<br />

Amplitude<br />

Threshold<br />

Point<br />

Holdoff Distance<br />

The Holdoff Distance defines how close to<br />

the Gauge Reference Point a level value is<br />

accepted. The Holdoff Distance is shown in<br />

red.<br />

Gauge Ref. Point<br />

(Gauge Reference<br />

Point)<br />

The Gauge Reference Point is shown as a<br />

dashed (olive colored) line:<br />

Zero Reference<br />

The Zero Reference (zero level; dipping<br />

datum point) close to the bottom of the tank, is<br />

defined by the Tank Reference Height (R). It is<br />

shown as a dashed (sand colored) line:<br />

7-24 Section 7. Service Functions

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