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A-96.250.441 / 060619
AMU pH-Redox
Maintenance
Clean
pH Electrode
1
Wipe the electrode shaft and the green tip cautiously with a soft,
clean, and damp paper tissue.
2
Remove grease with a tissue moistened with alcohol.
3
If the electrode is very dirty, put its tip into 1% diluted hydrochlo-
ric acid for roughly 1 min.
4
Afterwards rinse the electrode tip thoroughly with clean water.
5
Install the electrode into the flow cell again.
6
Let the electrode run-in for 1 h before the first calibration.
Clean
ORP Electrode
1
Wipe off dirt cautiously with a soft, clean, and damp paper tis-
sue.
2
Remove grease with a tissue moistened with alcohol.
Dull platinum surfaces indicate a contamination.
3
If the electrode is very dirty, put its tip into 1% diluted hydrochlo-
ric acid for roughly 1 min.
4
Afterwards rinse the electrode tip thoroughly with clean water.
5
Install the electrode into the flow cell again.
6
Let the electrode run-in for 1 h before the first calibration.
6.4.
Calibration
Process
pH Calibration
The process calibration is based on a comparative measurement of
the on-line instrument with a calibrated comparative electrode. Per-
form a valid manual measurement with the calibrated comparative
electrode. Then compare the measuring value with the on-line in-
strument and if necessary, enter the correct measuring value in the
menu <Maintenance>/<Calibration>/<Process pH> of the on-line
instrument.
The deviation of the measuring values is shown as offset in mV.
Select <Save> and press [Enter] to save the correct measuring val-
ue.
