Setting The Flow Rate, Flow Acceleration, And Flow Deceleration - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

5.5.4 Setting the Flow Rate, Flow Acceleration, and Flow Deceleration

In Chromeleon or on the pump menus, you can set how fast the pump starts delivering with
the selected flow rate (flow acceleration) and how fast the pump flow is reduced (flow
deceleration).
• If the values are too low, it will take accordingly long for the pump to reach the necessary
flow, and thus to build up the necessary pressure or reduce the flow and thus, the pressure
as required.
• If the values are too high, this may impair the lifetime of the column.
Recommendation: Set these parameters to values between 1/3 and factor 3 of the (column)
flow rate.
To set the flow rate, flow acceleration, and flow deceleration in Chromeleon
1. In Chromeleon, open the Commands dialog box for the pump (→ page 89).
2. Select Flow and enter the flow rate in the Nominal box.
The allowed flow rate range is indicated in the Properties dialog for the module
(→ page 48). In the Properties dialog box, you can change the upper and lower limit for
the flow rate within the allowed range.
3. Under MaximumFlowRampUp, check and change the flow acceleration setting if
necessary.
Under MaximumFlowRampDown, check and change the flow deceleration setting if
necessary.
To set the flow rate, flow acceleration, and flow deceleration on the pump display
1. Select the Control menu for the pump.
2. Select Flow Rate and enter the preferred value.
3. Select the Preferences menu.
4. Under Flow Acceleration, check and change the flow acceleration setting if
necessary.
Under Flow Deceleration, check and change the flow deceleration setting if
necessary.
Operating Instructions
UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Page 119