Dennerle 160 Primus Notice D'emploi page 19

Please note: After adjusting the pressure reducer, there is
always a delay before the number of bubbles is altered
accordingly (the hose acts as a pressure buffer). The number of
bubbles should thus be set in small steps, always waiting a
couple of minutes until the new setting has stabilised.
Note: If the setting knob is turned towards " – " in larger steps
of around 1 complete turn, the pressure reducer will release the
superfluous pressure through a small vent hole – audible as a
brief hiss. This venting serves to quickly stabilise the newly set
number of bubbles.
• Check the number of bubbles regularly in the first few days,
correcting as necessary. After this initial period it is generally
sufficient to check the number of bubbles once a week.
4 Controlling CO
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CO long-term test
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4.1 Mode of functioning
The colouring of the special CO
content:
• Blue = not enough CO
• Green = CO level ideal (approx. 20 mg/l)
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• Yellow = too much CO
The CO content in the aquarium can be read directly from the colour
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matching scale in mg/l.
4.2 Installation procedure for the CO
Correct
• Remove test container from clasp. Pull off top part of test con-
tainer. ©
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• Shake the indicator down in the ampoule so that there is no
indicator in the neck of the ampoule. Twist off sealing tab. ©
• Fill the top part of the test container with the entire contents of the
ampoule. ©
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• Slot bottom part of housing including conical reflector into the
top part. Check that the O-rings are fitted correctly. ©
Turn test container carefully and insert in clasp. ©
•
• Secure the CO long-term test in an upright position at a clearly
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visible point in the aquarium where a gentle flow of water
prevails. ©
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• Stick the "CO " colour matching scale to the outside of the front
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pane. ©
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Please note: As the CO takes some time to diffuse into the indica-
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tor, the colouring of the indicator always takes 1-2 hours to respond
to changes in the CO content. You should therefore always increase
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the supply of CO only in small steps of a few bubbles per minute
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spread over several days until the ideal CO
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content with the
indicator varies according to the CO
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2
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long-term test
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content is attained.
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4.3 Use as a long-term pH test
Provided that there are no other substances in the water which will
have a substantial influence on the pH level (e.g. humic acids, nitrate,
pH minus preparations), the CO
nitor the pH value in the aquarium.
For this purpose, you must:
• Measure the carbonate hardness (CH) of the aquarium water
(tests available from specialist retailers).
• Stick the appropriate "pH" colour matching scale to the outside
of the front pane. ©
The pH value of the aquarium water can now be read directly
from the colour scale.
Measure the carbonate hardness regularly and always use an
appropriate colour scale.
4.4 Replacing the special CO
In order to guarantee the quickest and most exact colour response at
all times, we recommend filling the test container with fresh special CO
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indicator every 4 to 6 weeks.
For this purpose, open the test container and pour the old indicator
down the drain. Rinse test container with tap water and dry with
kitchen paper before refilling.
4.5 Cleaning the CO
Use warm water and a soft sponge. Do not use any cleaning agents.
If necessary, grease the two O-rings slightly with Vaseline before
re-assembling the test container. Do not use any other lubricants, as
these may lead to incorrect colour indications.
4.6 Special information
• The special CO
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chemical solvents. Prolonged skin contact and eye contact should
nevertheless be avoided.
• Any indicator which may be dropped into the aquarium water by
mistake is harmless for the creatures living in the aquarium.
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• The indicator should be protected from sunlight, heat and frost.
Always keep ampoules protected from light during storage. The
filling level may vary for technical reasons.
4.7 If you're keen to know more: How you can also
calculate the CO
CO -Gehalt, Karbonathärte (KH) und pH-Wert stehen in einem gewis-
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sen Verhältnis zueinander. Aus pH-Wert und Karbonathärte lässt sich
der CO -Gehalt des Wassers genau berechnen. Geeignete pH- und KH-
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Tests erhalten Sie im Fachhandel.
• Certain correlations apply between CO
ness (KH) and pH value. The CO
culated accurately on the basis of the pH value and carbonate
long term test can also be used to mo-
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indicator
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long-term test container
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indicator is harmless and does not contain any
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content in the aquarium
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content, carbonate hard-
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content in the water can be cal-
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2