Emerson Rosemount 5900C, Справочное руководство

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Filter settings
The Filter Settings window provides various functions for optimizing echo tracking
depending on tank conditions and movement of the product surface.
Figure 4-27: Filter Settings
The Distance Filter Factor defines the amount of product level filtering (1 = 100%).
A low Filter Factor makes the level value steady but the device reacts slowly to level
changes in the tank.
A high Filter Factor makes the device react quickly to level changes but the presented level
value can sometimes be somewhat jumpy.
The Jump Filter is typically used for applications with turbulent surface and makes the echo
tracking work smoother as the level passes, for example, an agitator.
The Least Square Filter provides increased accuracy for slow filling or emptying of a tank.
The Least Square filter can not be used at the same time as the Adaptive Filter.
The Adaptive Filter automatically adapts to the movement of the surface level. It tracks
product level fluctuations and continuously adjusts the filter grade accordingly. The filter
can preferably be used in tanks in which fast tracking of level changes are important and
turbulence occasionally cause unstable level readings.
Configuration Reference Manual
September 2019 00809-0100-5901
192 Reference Manual