If you want to provide the actual pump relative speeds, Pattern Based should be selected from the VSP Type menu. The default pattern is Fixed, which corresponds to constant speed performance at a speed from the General tab.

Usually, you will want to specify a series of pump relative speeds. To do this, click the Ellipsis (…) button next to Pump Speed Pattern. This will open the Pattern Manager dialog box. Click the Add button, and the Pattern Editor dialog box will appear. From this dialog box, you can assign a label (name) to the new Pattern and complete the series of multipliers (i.e., relative speeds) versus time. Clicking OK twice will return you to the VSP tab.

A difficulty in using Pattern Based speeds is that the pattern that would work well for one scenario may not work well for other scenarios. For example, tanks will run dry or fill and shut off for a slightly different scenario than the one for which the pattern was created.