Emerson Rosemount 3051S MultiVariable Reference Manual page 29

Reference Manual
00809-0100-4803
6. Select Next to continue with the flow configuration on the Primary Element
7. Proceed with the steps in
Custom gas
About this task
The custom gas option should be used for fluids not in the database such as proprietary
fluids or gas mixtures. To properly calculate the fluid properties, the compressibility factor
or density needs to be entered at specific pressure and temperature values based on the
operating ranges entered by the user. The pressure and temperature values may be edited
as needed. The editable values are shown in fields with white backgrounds. For best
performance, it is recommended that, whenever possible, the compressibility or density
values be entered at the suggested pressure and temperature values.
To ease entering the compressibility/density or viscosity values, data can be copied from a
spreadsheet and pasted into the grid. The recommended process is to copy the pressure
and temperature values from the table on the Engineering Assistant screen to assist in
computing the density or compressibility values. Once the compressibility or density
values are computed, they may then be copied from the spreadsheet and pasted into the
grid on the Custom Gas Fluid Properties tab.
Procedure
1. Expand the Gas category.
2. Select the Custom Gas option.
3. Enter the Nominal Operating Pressure and Temperature Ranges. Engineering
4. Select Next to proceed to the Custom Gas Fluid Properties tab.
Emerson.com/Rosemount
Figure 2-15: Fluid Properties Tab
Selection tab.
Assistant will use these ranges to identify the pressure and temperature values at
which the fluid properties are required.
Primary element selection.
Configuration
October 2018
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