Emerson Rosemount 5408 Reference Manual page 243

Figure C-13:
A.
B.
C.
D.
Bottom offset
The Bottom Offset is defined as the distance between Zero Level and the tank bottom. The
default value is zero.
If the Zero Level is not located at the tank bottom, then enter a Bottom Offset. It is needed
for the transmitter to know the position of the tank bottom echo and for correct volume
calculations.
Rosemount 5408 and 5408:SIS Level Transmitters
Reference Offset
Tank Reference Point
Device Reference Point
Reference Offset > 0
Reference Offset < 0
Configuration Parameters
233