GE AKTA pilot 600 User Manual page 56

3 Description of modules
3.11 pH monitor (optional)
Function
The pH module has two positions for the electrode: one position for measurements,
calibration or cleaning in-line, and one for storage of the electrode. A dummy is placed
in whichever position the electrode is not using. The module also has a manual injection
port that facilitates the pH calibration. The pH electrode can both be calibrated before
a run and cleaned after, without the need to open the flow path.
Pressure protection
The pH electrode is sensitive to high pressure, but normally the pressure is low after the
column. To protect sensitive monitors after the column, the post-column pressure has
an alarm level of 0.8 MPa. This alarm is independent of other settings.
Cleaning, storing, and calibration
For instructions on how to clean the pH electrode outside the flowpath, store or calibrate
the pH monitor, see the ÄKTA pilot 600 Operating Instructions.
Before running a cleaning-in-place (CIP) method to clean the pH electrode in the flow
path, make sure the electrode is compatible with the selected cleaning solution.
Tip:
56
Perform a system wash after the calibration to wash away the calibration
buffer that was introduced into the flow path.
ÄKTA pilot 600 User Manual 29274559 AA