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5.2.5 pH electrode calibration
pH
pH
pH
When CAL flashes, press . flashes on the second line.
1. Remove the protective cap from the electrode tip.
2. Rinse electrode tip briefly with DuplaDest.
3. Dip the electrode into the pH 7 solution and press
.
A measured running value is displayed together with CAL on the first line,
When
and
SET
are displayed on the second line.
When the measured running value has settled, press the
button for three seconds – until you hear a long
beep as confirmation as value acceptance.
When
is displayed with CAL on the first line and with
SET
on the second line.
4. Take the elctrode out of the pH 7 solution and press
to proceed calibration.
flashes on the second line.
5. Rinse the electrode tip briefly with DuplaDest.
6. To calibrate the pH Electrode for freshwater aquaria, dip the electrode into the pH 4 solution for freshwater and
acknowledge with
.
(To calibrate the pH Electrode for saltwater aquaria, use the ▲ or ▼ button until
flashes, dip the electrode
into the pH 9 solution for saltwater and acknowledge with .)
7. A measured running value is displayed together with pH and CAL on the first line.
When
( ) with
SET
is displayed on the second line.
When the measured running value has settled, press the
button for three seconds – until you hear a long
beep as confirmation as value acceptance.
When
( ) is displayed with CAL on the first line and ( ) with
SET
on the second line.
Press
to finish calibration. When the calibration is finished, CAL and
flashes.
8. Rinse the electrode tip briefly with DuplaDest.
9. Fix the electrode in the aquarium with suction cups.
Please note: The calibration can be interrupted at any time by pressing the ▲ or ▼ button at the same time.
Caution: Used electrodes which top has been dried completly in the protection cover need to be put in water
over night before the calibration is done. New electrodes need a 14 days run-in period. After that a second
calibration is necessary for precise mesurement.
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