19
5.3.5 pH electrode calibration
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
and
pH
on the first line,
while
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 .
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,
(
) with SET is displa-
yed 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 .
Press
to finish calibration . When the calibration is finished,
CAL
and are flashing .
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.
