Emerson Rosemount 5408 Reference Manual page 253

Table C-9:
Parameter
Track upper surface
Track lower surface
Upper product dielectric constant
Double bounce handling
Use this function to prevent transmitter from locking on strong double bounce echoes
(may occur in spherical and horizontal cylinder tanks). See
information.
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
Rosemount 5408 and 5408:SIS Level Transmitters
Double Surface Handling
Description
Track upper surface when there are multiple
products in the tank (for example thin oil layer
on top of water).
Track the lower product surface, such as the in-
terface when there are multiple products in the
tank, or the product surface instead of a foam
layer.
Enter the dielectric constant for the upper prod-
uct. A more precise value results in better accu-
racy for the lower surface level.
Section 7.5.4
Figure C-17 for default factory settings.
Configuration Parameters
for more
243