Operation - Dennerle 588 Comfort Bedienungsanleitung

14
10
15
16
17
18
Connection between pH
value, CO content and
2
carbonate hardness
(compiled by Tillmans.
It applies at a temperature of 25 °C)
KH 60 mg/l CO 35 mg/l CO
2
(°d) to much CO 2 o.K.
CO
2
pH value pH value
2 6.0 6.3
4 6.3 6.6
6 6.5 6.7
8 6.6 6.9
10 6.7 7.0
15 6.9 7.1
20 7.0 7.3
Older sensors can be regenerated by placing them for 12 hours into a KCL solution
(immerse the tip of the sensor about 2 cm)
and calibrate again. Employing this process, it may also be possible to regenerate sen-
sors which had dried out due to an oversight.
2.7 pH calibration solutions
The accuracy of the calibration depends decisively on the quality of the calibration solu-
tions. Therefore you should only use original DENNERLE calibration solutions
use fresh calibration solutions and calibrate the sensors in separate, clean vessels. Pour
away calibration solutions after they had been used once. Do not calibrate in the solution bott-
les - water adhering to the sensors could change the calibration solutions.

3 Operation

3.1 Actual pH value
During normal operation, the display shows the actual pH value, as measured in the aquarium.
3.2 Setting the desired pH value (= set value)
Push the "PROGRAMM" button and hold it down for at least 3 seconds. Then set the desired
pH value by slowly turning the large control knob (to + or -). Release the "PROGRAMM" but-
ton. The desired pH value is set. The display again shows the actual pH value.
3.3 Indicating the desired pH value (= set value)
Push the "PROGRAMM" button and hold it down for at least 3 seconds. The display now
shows the set pH value. When the button is released, the actual value is shown again.
4 Functioning during normal operation
4.1 Example: Actual pH value in the aquarium = 7.5. You have set pH 6.8.
The LED "CO -ZUGABE (SUPPLY CO
2
is supplied (in accordance with the CO
the needle valve of the pressure reducer). CO
has reached a pH value of 6.7*. The pH-Controller then switches the solenoid valve off.
4.2 Example: Actual pH value in the aquarium = 6,5. You have set pH 6,8.
The LED "CO -Zugabe (SUPPLY CO
2
pH value in the aquarium water has climbed over 6.9*, the pH-Controller will switch the
CO supply on again.
2
4.3 CO
Please note the formula for the minimum supply of CO
for use" for CO
= number of CO
Example: Aquarium 200 l, carbonate hardness 5 °dH. Calculation: 200 x 5 : 50 = 20
bubbles per minute.
Start with this minimum bubble output per minute and increase slowly, spread over
10 mg/l CO
2 2
several days. Especially at the beginning monitor the pH value repeatedly.
not enough
CO
2 IMPORTANT: Depending on the carbonate hardness, select pH values only which are
well-tolerated by the fish. DENNERLE recommends a CO
pH value
to the accompanying tabulation "Connection between pH value, CO
6.8
bonate hardness", as well as to the references in the DENNERLE brochures, the
7.1
"Instructions for use" and in specialized books.
7.3
The bubble output is set correctly, as soon as the pH value matches the carbonate hard-
7.4
ness** listed in the tabulation. To avoid overdosing, it is important to set the bubble out
7.5
put not too high, especially at the beginning.
7.7
7.8
** Recommendation: Always use fresh reagents, as KH-reagents may age quickly!
) lights up
2
bubble output per minute, as previously set on
2
) is not lit. CO
2
bubble output
2
appliances: Aquarium volume (litres) x carbonate hardness (°dH) : 50
2
bubbles per minute.
2
. Then rinse the sensor with distilled water
14
16
17
. The solenoid valve is open and CO
18
will be supplied until the aquarium water
2
will not be supplied. Only after the
2
* Switching points: set value +/- pH 0.1
in DENNERLE's "Instructions
2
content of 30 - 40 mg/l. Refer
2
. Always
15
2
content and car
2
17