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GPS-X Technical Reference

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Influent Models 62<br />

The Influent Advisor screen shows three columns of data: User Inputs, State Variables, and<br />

Composite Variables, as shown in Figure 5-2.<br />

Figure 5-2 - Influent Advisor Menu<br />

The fields in the left-hand column show the inputs available to the user, such as influent<br />

concentrations and stoichiometric ratios. The centre and right hand columns show the state<br />

variable and composite variable concentrations calculated from the user inputs.<br />

As the user changes values in the left-hand column, the variables in the centre and right-hand<br />

columns are automatically updated. This allows for easy debugging of confusing or conflicting<br />

influent characterization data.<br />

Clicking on any variable in the centre and right-hand column illustrates how that value is<br />

calculated. The formula will be displayed in the formula box (located in the lower middle of the<br />

screen – you may need to scroll down to see it). The values used in the formula will be<br />

highlighted in the tables so that the applicable cells can be identified. If a negative value is<br />

calculated in either table, the cell will turn red. Correcting problematic data is only a matter of<br />

adjusting the input cells to achieve non-negative values.<br />

<strong>GPS</strong>-X <strong>Technical</strong> <strong>Reference</strong>

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