5. Important notes!
To ensure proper functioning and durability of the sys-
tem, the user must thoroughly understand the
instructions for use and comply with the application
conditions.
The included solenoid valve (3.3) will regulate the CO
2
supply if you use the seramic as a CO
2
controller.
(Please see the separate instructions for use for putt-
ing the solenoid valve into operation.)
A pressure reducer (e.g. sera CO
2
pressure reducer for
external valve, item No. 08035) must be installed
before the solenoid valve. We recommend the sera
precision CO
2
fertilization system (item No. 08055) with
pressure reducer, CO
2
bottle and CO
2
reactor with bub-
ble counter when using the seramic as a CO
2
con-
troller.
The solenoid valve is connected to the pressure reduc-
er with a CO
2
hose. The maximum operating pressure
is 1 bar (14.5 psi.).
Do not connect the seramic pH Controller without a
pressure reducer valve from the CO
2
bottle!
Always connect the pH electrode to the control unit
before the electrical cord is plugged in.
6. Assembly
Attention: Unplug all electrical devices before instal-
lation!
The included universal holder (4) allows to attach the
seramic to the aquarium cabinet or the wall, or to place
it on a table.
ATTENTION:
The control unit (3.1), the solenoid valve (3.3) and the
included socket (3.2) must always be located in a dry
place.
The junction of the pH electrode (3.4) is always
immersed in the aquarium water. The 1.5 meter (5 ft.)
flexible cord of the pH electrode should be laid freely
and connected to the control unit.
Integration of seramic pH Controller to an existing in-
stalled CO
2
system with bubble counter and CO
2
reactor
Procedure:
Shut off the CO
2
supply. The pressure reducer and the
outlet valve should remain shut off (5) as well. You may
begin with the installation when the bubbles stop
escaping in the bubble counter.
Connect the sera solenoid valve between pressure
reducer and bubble counter as follows:
Remove the hose that runs between the outlet of the
pressure reducer valve and inlet of the non-return
valve (6). Cut the supplied CO
2
hose to make two hoses
of suitable lengths. Connect one hose between the
outlet of the pressure reducer valve and the CO
2
intake
of the solenoid valve (see direction of the arrow) (7). To
secure, unscrew and slip the hose into the retainer
ring of the CO
2
intake. Insert the hose into the plastic
nozzle of the CO
2
intake as far as possible. Screw and
tighten the retainer ring to the CO
2
intake (8). In the
similar fashion, connect the second hose to the CO
2
outlet of the solenoid valve and the non-return valve (7).
Caution:
The control system should always be installed with at
least one high-quality non-return valve (e.g., sera non-
return valve).
Use at least one sera non-return valve for safety reason.
The non-return valve will prevent any back-siphoning
of aquarium water when the CO
2
bottle has become
empty protecting the sera solenoid valve from water
damage. Every time water has been drawn back into the
non-return valve it must be replaced, as it can become
leaky due to mineral deposits.
7. Operational features, displays and adjustment of
desired pH value
The illustration shows the front panel of the seramic.
The unit is equipped with a four-figure display that
tells
• momentary pH value or
• desired pH value
• Hi/Lo LED display
• OUTPUT display
Operation panel and functions
Keys 1 and 2 must be pressed at the same time as to
enter the menu.
Key 1
Key 2
Function / Description
adjustment of desired pH value
lower or raise desired pH value
switching from function
“lower pH” (CO
2
system) to
“raise pH” (buffer dosage)
adjustment of hysteresis
lower or raise hysteresis
calibration with test solution
pH 7.0
calibration with test solution
pH 4.0
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