Sera PRECISION seramic pH Controller Manual De Instrucciones página 15

8. Starting up
8.1 Preparing of the pH electrode
Before installing the seramic, soak the pH electrode in
distilled water in a clean glass with old, chlorine-free
water for at least 12 hours (9). To do this, carefully
unscrew and remove the electrode protection cap. A
white salt-like deposit may coat the electrode tip. This
is normal and dissolves after a few minutes in the
water. Observe Min/Max immersion depth. This is more
urgently required if the electrode tip has been dry for
more than a few minutes. (The electrode tip must be
kept permanently moist.)
Keep in mind that only the electrode shaft is made of
plastic. The inner capillary tubes, however, are made of
glass and very fragile. To rinse the electrode you will need
distilled water. Use only sera aqua-dest or distilled water
from the pharmacy.
Then connect the BNC plug of the electrode to the cor-
responding socket of the seramic. Now the control unit
can be put into operation by plugging in the mains plug
into the supplied socket.
8.2 Calibration of the pH electrode
The next step is to calibrate the pH electrode using the
test solutions pH 4.0 and 7.0 (3.8/3.9). Please use a meas-
urement vial (10 ml) as to keep test solution consumption
as low as possible. Do not use a used test solution again.
Please close the opened 100 ml (3.38 fl.oz.) bottle imme-
diately again.
Safety color indicators of the sera test solutions
Caution: The sera test solutions contain color indica-
tors. The sera test solution pH 4.0 is red, the sera test
solution pH 7.0 is green. Test solutions that are dirty or
too old change or lose these colors. Using such test
solutions can lead to dangerous measuring and regu-
lation errors!
Note: Not all impurities cause color destruction or color
change. Therefore it is especially important to treat the
test solutions carefully. Never use test solutions more
than once or fill them back into the bottle!
We recommend storing opened test solutions for a
maximum of 12 months at room temperature, even if
the color indicators are still intact.
Lowering the pH value has a major influence on water
chemistry. Sudden and considerable pH value changes
are always a threat for the whole biotope. Therefore,
please do not change the desired value too strongly,
and only in steps as small as possible over several days.
For all changes, check if the desired value is suitable for
all animals and plants. (You will find a chart as a further
basis and recommendation on page 13, typical pH values.
Please also pay attention to section 8.5, activating and
.)
dosing CO
2
Calibration
pH 7 Rinse the electrode with distilled water and
immerse it into the green sera test solution pH
7.0. Wait for at least 60 seconds. Press the keys
at the same time. The display will flash 3 times
showing pH
then you will hear a signal sound indicating that
the pH value 7.00 is stored. The unit will immedia-
tely return to measuring mode.
pH 4 Repeat this procedure with the sera test solu-
tion pH 4.0. Rinse the electrode with distilled
water, immerse into the sera test solution pH 4.0
and wait for at least 60 seconds. Press the keys
at the same time. The display will flash 3 times
showing pH
then you will hear a signal sound indicating that
the pH value 4.00 is stored. The unit will immedia-
tely return to measuring mode. The calibration
procedure is now finished.
The unit will display
in case of a mistake during the calibration pro-
cedure.
Adjusting the desired pH value
Press the keys
• The "old" preselected pH value will appear in the dis-
play. Using the arrow keys, you can now set the
desired pH value at which the unit will stop the CO
supply via the solenoid valve.
• To do so, press the
upward arrow key
if you wish to raise the pH value, and the
downward arrow key
if you wish to lower it.
Press the
once the desired value is attained, and the adjusted
value will be stored. The display will immediately
show the current pH value of the aquarium water.
15
and
,
and
,
and at the same time.
key
2