Emerson Rosemount 5408 Reference Manual page 270

Configuration parameters
February 2020
Double bounce handling
Use this function to prevent transmitter from locking on strong double bounce echoes
(may occur in spherical and horizontal cylinder tanks).
Related information
Handling strong double bounce echoes
Overfill prevention
The Overfill Prevention function adds an extra layer of protection to prevent tank overfills.
The function uses an independent echo logic algorithm to identify the surface echo close
to the top of the tank.
In the unlikely event there is a conflict between the normal and the overfill prevention
echo logic, the Overfill Prevention function will have a precedence in determining the
position of the surface. The transmitter will then output this new value, or generate an
alarm if the normal echo logic is not able to find the surface echo at the new position.
The Overfill Prevention Range defines the lower end of the range in which the function
operates. The range is configurable. See
Figure C-17: Overfill Prevention Range
100% (20 mA)
0% (4 mA)
A. Device Reference Point
B. Overfill Prevention Range
C. Rosemount 5408:SIS
D. Rosemount 5408
270
C
80%
Figure C-17 for default factory settings.
A
20 in.
(500 mm)
B
B
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D
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