19
10. Technical Data
seramic pH Controller:
Case protected against water splashing *
pH control unit with user guided calibration
Supply voltage
230 V/50 – 60 Hz
optionally
115 V/50 Hz; 110 V/60 Hz
Total operating energy input 2 VA (Watts)
Measurement precision
±0.1 pH units
(at 25°C/77°F)
Measuring range (pH value)
pH 2 – 12
Control range (pH value)
pH 4 – 9
Switching delay
pH 0 to 2
in steps of 0.01
Display
4 digit LED display
Input resistance
of electrode
within Giga Ohm range
sera CO
2
solenoid valve:
Total operating energy input 1.6 VA (Watts)
Max. Pressure load
5.5 bar (80 psi.)
Ambient temperature
0 – 50°C (32 – 122°F)
Hose connector
4/6 mm (0.16/0.24 in.,
internal/external
diameter)
Switchable socket:
Switching capacity max.
1,000 W
max. load
5A at 250 V~
* The socket for connecting the pH electrode (electrode plug) is
not moisture proof. Exposing this socket to moisture may
cause incorrect pH measuring values. This may lead to uncon-
trolled CO
2
release into the aquarium.
11. Spare parts and accessories:
sera pH measuring electrode
(item No. 08921)
sera CO
2
solenoid valve
(item No. 08030)
sera test solution pH 4.0
(item No. 08916)
sera test solution pH 7.0
(item No. 08923)
sera CO
2
hose 4/6
(item No. 08022)
sera non-return valve
(item No. 08818)
Disposal of the unit:
Waste electrical and electronic equipment (WEEE)
must not get into domestic waste!
If ever the unit cannot be used anymore, the consumer
is legally obliged to hand in waste electrical and elec-
tronic equipment (WEEE) separately from domestic
waste, e.g. at a collection point of his community/his
district. This ensures that waste electrical and elec-
tronic equipment (WEEE) is expertly processed and
that negative effects to the environment are avoided.
Therefore electrical and electronic
equipment bears the following symbol:
Problem
Possible cause
Troubleshooting
CO
2
consumption too high
Too strong aeration of the aquari-
um, no cover
Reduce CO
2
loss by reducing oxygen
supply
Tightening nut at adjustment wheel
of sera CO
2
pressure reducer has
become loose
Fasten tightening nut firmly by
hand. Do not use a wrench!
Threaded screw of pressure reducer
was over-tightened (display reads in
the RED area). Safety valve opens,
and CO
2
escapes with a hissing
sound
Loosen threaded screw
immediately. Open outlet valve
(adjustment wheel) to release the
built-up pressure. Close outlet valve
and tighten threaded screw very
slowly, so that operational pressure
is 1 bar (14.5 psi.)
Electrode shows discoloration
inside the shaft
Electrode has been contaminated
by other chemicals or medications
Replace
Fish are below surface and breath-
ing heavily or swimming abnormally
through the water
CO
2
gas having escaped from the
water is trapped below aquarium
cover
Provide better air circulation
pH value is too low in relation to
the carbonate hardness
Carry out a partial water change of
10 – 20%. Adjust to a higher pH
value after
Filter is not functioning properly
Clean filter
Aquarium water is heavily burdened Carry out a partial water change
with gravel cleaning