Instructions pH FUN V1
Page 12 of 28
3.2.2 Electrode care
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The pH-sensitive membrane glass must be handled with care and protected against damage.
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The inner reference solution in the glass electrode must cover the inner surface of the membrane glass. Any
air bubbles are removed by gently shaking the electrode vertically (like shaking a medical thermometer).
Contamination deposited on the surface of the membrane glass must be removed by carefully wiping it with a moist
paper towel. Alternatively, you can use the supplied electrode cleaning solution.
3.2.3 pH7 Calibration of the electrode
For instructions on the pH7 calibration of the electrode, please refer to 6 Performing the pH7 calib.
3.3
Decommissioning / Winter storage of the system
If the system is put out of operation for lengthy periods, e.g. for winter storage, certain precautionary measures need to
be taken. In particular, it is very important that the entire system is protected against freezing temperatures and
humidity.
Dosing system
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Rinse the pump with fresh, lukewarm water for about 30 minutes. To do so, you can place the suction lances
into a pail filled with tap water and start a manual dosing (see Chapter 5 Performing a manual dosing).
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Subsequently ensure that the system is fully disconnected from the power grid.
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Loosen the dosing hose set to prevent permanent deformation.
Measuring system
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Take the electrode out of the measurement cell and place it upright in the containers a frost-free location. The
three molar KCL solution in the containers protects the electrodes from drying out. Alternatively, the electrodes
can also be stored in buffer solution or clear tap water.
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Close the electrode drill hole of the measurement cell with the supplied cover screw.
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Let the water drain from the measurement chamber and measurement lines. Connect the valves of the
measuring water extractor and return.