It includes cleaning of the membrane, possible the change of the electrolyte solution, the exchange of the membran head and the cleaning of the electrode system.
The maintenance interval depends on the particular measurement conditions, especially on the pollution degree of the measurement medium and the effect of disturbing substances, e.g. hydrogen sulfide, on the electrochemi-cal measurement system. To recover the full functional efficiency of the sensor in case of disturbances, it is recommended to proceed with the steps described in detail below:

1. Cleaning of the membrane with a wet pulp.
Rinse the membrane carefully with water without removing the membrane head and clean it with a wet pulp. If a new cali-bration is not possible afterwards or if the sensor data deviate significantly from the specification then the electrolyte solution and the membrane head have to be replaced.

2. Changing electrolyte solution and membrane head

Therefore unscrew the membrane head and examine the anode visually. Possibly the regeneration of the anode is necessary.

3. Regeneration of the anode