Emerson Process Management 5300 manual Volume Configuration, Tank Type, Strapping Table

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

Volume Configuration

Normally, this parameter does not need to be changed even if the actual dielectric constant of the product deviates from the Upper Product Dielectric parameter value. However, for some products, measurement performance can be optimized by setting the proper product dielectric constant.

For volume calculations, you can choose one of the standard tank shapes or the strapping option. Choose None if volume calculation is not used. For the standard tanks, a Volume Offset parameter can be specified which can be used for a non-zero volume that corresponds to the zero level. This may be useful, for example, if the user wants to include the product volume below the zero level.

Tank Type

You can choose one of the following options:

•Strap table

•Vertical Cylinder

•Horizontal Cylinder

•Vertical Bullet

•Horizontal Bullet

•Sphere

•None

Strapping Table

Use a strapping table if a standard tank type does not provide sufficient accuracy. Use most of the strapping points in regions where the tank shape is non-linear. A maximum of 20 points can be added to the strapping table.

Figure 5-3. 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.

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