GE AKTAprime plus Operating Instructions Manual page 54

6 Troubleshooting
6.3 pH curve problems
Error symptom
Slow pH response or
Calibration impossible
54
Possible cause
Contaminated elec-
trode glass mem-
brane
Membrane has dried
out
ÄKTAprime plus Operating Instructions 28-9597-89 AB
Corrective action
Check the electrode glass mem-
brane. If it is contaminated, clean
the electrode following the instruc-
tions in Monitor pH/C-900 User
Manual.
If the membrane has dried out, the
electrode may be restored by
soaking it in buffer overnight.