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