Monthly Maintenance - GE AKTApure User Manual

7.4 Monthly maintenance

Introduction
This section provides instructions for monthly maintenance actions.
Maintenance interval
Check the back pressure for the Flow restrictor every month.
Location of the Flow restrictor
The recommended positions for Flow restrictor FR-902 are:
• Connected between the Conductivity monitor C9 and the Outlet valve.
or
• Connected to the ToR and FrR ports of the pH valve.
Check Flow restrictor connected to Conductivity
monitor and Outlet valve
Follow the instructions below to check the back pressure of Flow restrictor FR-902, when this is con-
nected between the Conductivity monitor and the Outlet valve.
Step
1
2
3
4
ÄKTA pure User Manual 29119969 AB
Action
Immerse the piece of inlet tubing marked A1 in distilled water, and insert the piece of
tubing from Outlet valve port W into a waste container.
In the System Control module, select Manual:Execute Manual Instructions.
Result: The Manual instructions dialog opens.
In the Manual instructions dialog:
• Select Flowpath:Injection valve, and select Manual Load. Click Insert.
• Select Flowpath:Column valve, and select By-pass. Click Insert.
• Select Flowpath:Outlet valve, and select Out-Waste. Click Insert.
• Select Pumps:System flow and set the Flow rate to 2.5 ml/min. Click Insert.
• Click Execute.
Result: A system flow of 2.5 ml/min starts.
Note the PreC pressure displayed in the Run Data pane.
Tip:
If PreC pressure is not displayed, click the Customize icon. In the Customize dialog, under
the Run Data Groups tab, select PreC pressure.
7 Maintenance

7.4 Monthly maintenance

269