GE AKTApure - Page 270

ActionStep
Click on the Pause icon to stop the flow.5
Replace the Flow restrictor with a female/female union connector.
Tip:
The female/female union connector is included in the accessory kit.
6
Click the Continue icon to restart the flow.7
Note the PreC pressure displayed in the Run Data pane.8
Calculate the difference between the two pressure values.9
Check that the pressure difference is within the range 0.2 ± 0.05 MPa.10
If this is not the case, the Flow restrictor should be replaced, see Section 7.8.7 Replace
Flow restrictor, on page 330.
Check Flow restrictor connected to pH valve
Follow the instructions below to check the back pressure of Flow restrictor FR-902.
ActionStep
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.
1
In the System Control module, select Manual:Execute Manual Instructions.2
Result: The Manual instructions dialog opens.
In the Manual instructions dialog:3
•
Select Flowpath:Injection valve, and then select Manual Load. Click Insert.
•
Select Flowpath:Column valve, and then select By-pass. Click Insert.
•
Select Flowpath:pH valve, and set the pH electrode to Off-line and the Restrictor to
In-line. Click Insert.
•
Select Flowpath:Outlet valve, and then 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.
4
270 ÄKTA pure User Manual 29119969 AB
7 Maintenance
7.4 Monthly maintenance