GE AKTA avant User Manual page 295

Step
5
6
Clean the pH valve
Follow the instructions to clean the pH valve. The calibration function is used to switch
the valve position. However, no calibration is performed.
Step
1
2
ÄKTA avant User Manual 29035184 AE
Action
Fill a syringe with approximately 10 ml of an appropriate cleaning solution
(e.g., 1M NaOH). Connect the syringe to Injection valve port Syr, and inject
the cleaning solution. Leave the cleaning solution in place for 20 minutes.
Fill a syringe with distilled water. Connect the syringe to Injection valve port
Syr, and inject the distilled water.
Action
Connect tubing to pH valve port W3, and direct the other end of this tubing
to a waste container.
Unscrew the pH electrode from the pH valve, and replace it with the dummy
electrode.
7 Maintenance
7.6 Maintenance when required
7.6.2 Perform System CIP
295