Dupla 80290 Instrucciones De Uso página 4

8. Now fasten the electrode with the supplied clamps and suckers at the place of use in the aquarium.
Warning:
9. The electrode may be dipped for a maximum of up to 1 cm below the vent aperture into the water.
10. The electrode is now ready for use.
Repeating of calibration: Within 14 days of initial use. Then every 6 weeks.
Cleaning: The diaphragm and the glass membrane react sensitively to dirt and algae deposits. A sluggish reaction of the electrode is
then the consequence. We recommend that the electrode be cleaned every 4 – 6 weeks.
1. Use only water and soft cloth to clean the electrode.
2. If the contamination is more severe, place the electrode for approximately two hours into a beaker filled with Dupla cleaning
solution (item no. 80460).
3. After this treatment briefly rinse the electrode down with Dupla Dest.
4. Fill the protective cap with 3 molar KCL solution (item no. 80480) and then place it carefully on the electrode tip.
5. Leave the protective cap on the electrode for at least 4 hours.
6. Calibrate the electrode a new.
7. The electrode is now ready for use again.
Replacement of the KCL solution: If the electrode asymmetry is no longer calibratable, the KCL solution can be replaced. For
this purpose push back the silicone hose on the electrode head, until the opening is exposed. Now, with a Dupla dosing pipette
remove the old KCL solution from the electrode. After complete emptying, fill up the electrode with 3-molar KCL solution up to the
opening. Push the silicone hose over the opening. The electrode is ready for use again after new calibration.
Storage: For preserving the electrode, the protective cap is filled with 3-molar KCL solution and carefully placed on the electrode
tip. Check the electrode regularly every four weeks. The device must only be stored in dry rooms at temperatures between 10 – 30
°C. The electrode may burst at temperatures below -15 °C due to the inner electrolyte freezing. The electrode must never be
stored in distilled water!
Important notes:
· Never operate the electrode completely immersed, not even for a short time. The cap must always remain above the
surface of the water! Ensure safe fastening of the electrode.
· Always keep the connection plug dry.
· Do not install the electrode cable together with current-carrying, e.g. a lighting or heating cable.
· For extremely precise measurements the calibrating process can be repeated several times.
· Do not use the calibrating solution more than once.
· If the electrode reacts with striking slowness during calibration, the electrode must be cleaned.
· The electrode is made almost entirely of glass and fragile! It must therefore be treated with care and must not
be exposed to any mechanical pressure or impact.
· If the electrode has been stored dry for a relatively long time, it must be thoroughly soaked for 24 hours in 3-molar KCL
solution before measurement.
· Reference electrodes with liquid electrolyte should always contain enough liquid. The liquid column inside the electrodes
should reach up a few centimetres higher than the surface of the measuring solution.
· From time to time the filling aperture of the electrode must be freed for the purpose of pressure balancing. That also applies
to the first use.
· Cystallising of the 3-molar potassium chloride solution on the Dupla pH electrode is a natural process and does not
affect its quality in any way. Before first use simply wash under running water.
· The electrode must never be used in combination with medication, algae killers or similar chemicals! The
electrode must be removed from the tank for the duration of treatment.
Safety instructions: Technical products may only be operated as supplied. Electronic components must not be altered
in any way, and leads must not be shortened. Covers or housings must not be opened. The product must not be used if
damaged or must be shut down immediately by pulling the mains plug if damage is detected.
4