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Dissolved Electrode Maintenance

The SZ10T electrode requires only little maintenance but should be checked regularly. Normal cleaning/rinsing of the body and replenishment of the electrolyte (see Start Up) should mostly be sufficient.

Mind that the use in some environments (e.g. algae) might block the membrane and that regular adequate cleaning will be required.


When putting the electrode aside for later use, it is best to rinse it and make sure no precipitations of any kind are present before storing it. Cleaning it with some detergent solution removes greases and many other impurities.

For short periods (days to a few weeks), have an electrode bottle filled with clean distilled water to be placed on the electrode (in absence of air). This way, the electrode remains humid and ready for direct use. The Oxygen present in the water will be consumed after some time and the electrode will no longer consume electrolyte. Before using it again, remove the electrode bottle and wait 5 minutes for the electrode to become fully active again and to verify it by e.g. calibration.

For longer periods (months) will it be better to remove the membrane cap, empty it, rinse and dry the electrode before putting it aside on a safe place. To take it back in use, reassemble the electrode according to the method described in Start Up.

Membrane replacement

Replace the membrane and O-ring only when damaged, not when calibration is no longer possible!

Remove the membrane by

  • unscrewing the cap from the electrode,
  • empty and rinse the cap,
  • put the cap on a flat surface with membrane at the top,
  • push the membrane downwards using the black tool suppleid with the electrode.

Check how to place the membrane and O-ring:

Zero point

After the electrode has been used for a period of time, the residual current may rise (see Zero point). To reduce the residual current, the following cleaning method is recommended.


  1. Carefully unscrew the membrane cap from the body.
  2. Rinse the inside of the membrane cap with DI water.
  3. Soak the Lead anode in 0.1N HCl (Do not use aqua regia!) for 15 to 20 minutes. Rinse thoroughly with DI water, blot dry with tissue paper.
  4. Mix soap, water and a few drops of ammonia together in a container. Brush the cleaning solution onto the tarnished Platinum with care. Use an old toothbrush or other soft-bristled brush. Work gently to get rid of the tarnish.
  5. Rinse the soaked portions thoroughly with DI water. Blot dry with tissue paper.
  6. Reassemble the electrode according to the method described in Start Up.
do_maintenance.txt · Last modified: 16/04/2018 10:41 by pieter