Hach ORBISPHERE Manual Básico Del Usuario página 14

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13.
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.
16. On the sensor cleaning and regeneration center, turn the knob to the Guard position and press
the TIMER switch. Again, watch for the formation of bubbles and repeat the cleaning process if
necessary.
17.
17. On the sensor cleaning and regeneration center, turn the knob to the Cathode position and press
the TIMER switch. Again, watch for the formation of bubbles and repeat the cleaning process if
necessary.
18. When cleaning is complete, unplug the sensor from the cleaning center and re-install the plastic
sensor base for the rest of the procedure. Remove any remaining electrolyte by rinsing the
sensor head under a tap for 60 seconds, aiming the jet of water directly onto the sensor head.
Note: For DG33619 regeneration cell, unscrew the regeneration cell from the sensor head.
19. With the help of a pair of tweezers, remove the old O-ring from the sensor body. Replace the O-
ring with a new one from the recharge kit.
20.
Note: During this step, it is very important to ensure your finger does not come into contact with the cathode
(golden surface) as it could leave greasy deposits on the surface.
Take a silicone disc from the recharge kit, hold it between thumb and forefinger and position it on
top of the anode.
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A1100

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