Rosemount 5401, Reference Manual

Page: 62 / 180

Reference Manual
00809-0100-4026, Rev FA
July 2009
Rosemount 5400 Series
5-8
Strapping Table
The Strapping Table option is used when the tank shape deviates significantly
from an ideal sphere or cylinder, or when high volume accuracy is required.
The Strapping Table divides the tank into segments. Level values and
corresponding volumes are entered at the bottom of the tank. These figures
can typically be obtained from tank drawings or from a certificate provided by
the tank manufacturer. A maximum of 20 strapping points can be entered. For
each level value the corresponding total volume up to the specified level is
entered.
The volume value is interpolated if the product surface is between two level
values in the table.
Figure 5-5. Strapping points
Actual tank bottom may look like this.
Using only 3 strapping points results in a level-to-volume
profile that is more angular than the actual shape.
Using 10-15 of the points at the bottom of the tank yields a
level-to-volume profile that is similar to the actual tank bottom.