Hach ORBISPHERE GA2 00 Series User Manual page 26

11. Remove the polishing tool from the sensor. Remove any polish deposits by rinsing the sensor
head under a tap for 30 seconds, aiming the jet of water directly onto the sensor head.
Note: If the sensor is used in high level hydrogen sample, do not perform the following steps but continue at
step 19.
12. Remove the plastic base from the bottom of the sensor and connect the sensor to the sensor
cleaning and regeneration center (32301).
13. Push the cleaning tool over the sensor head. Pour enough electrolyte (2959) into the cleaning
tool until it completely covers all the electrodes.
Note: For DG33619 regeneration cell, screw the regeneration cell on the sensor head.
14. On the sensor cleaning and regeneration center, turn the knob to the Anode position and press
the TIMER switch. A red warning light will come on and remain on for 60 seconds while cleaning
takes place.
15. At the end of the 60 second cleaning process, check for an abundant stream of bubbles that
should rise from the anode. If this does not happen, press TIMER again.
Note: The development of bubbles is a sure sign of a clean electrode.
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