Emerson Rosemount 5408, Справочное руководство

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Reference offset
Distance between the Device Reference Point and the Tank Reference Point (typically the
upper side of a customer plug where levels can be manually measured).
The Reference Offset parameter can be used to specify your own reference point, for
example when the measured level by the transmitter should correspond with the level
value obtained by hand-dipping.
Figure C-13: Reference Offset
%
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& '
$
%
A. Tank Reference Point
B. Device Reference Point
C. Reference Offset > 0
D. Reference Offset < 0
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.
Configuration parameters Reference Manual
February 2020 00809-0100-4408
260 Reference Manual