Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 31)

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Maintenance
Note: A sensor that has been taken apart or serviced must always be calibrated. Allow the sensor to settle
for 30 minutes, before performing the sensor calibration.
5.2 Electrochemical cleaning and regeneration center
The ORBISPHERE 32301 is a very efficient cleaning and regeneration tool for ORBISPHERE
electrochemical sensors. This tool reverses the electrochemical process that is taking place in
the sensor cell during normal operation. This removes oxidation and at the same time
regenerates the electrodes' surface. In addition, the regeneration center offers a continuity
tester for checking the sensor electronics.
Use of this tool is recommended because the regeneration of the electrodes allows for a
noticeably extended sensor life.
Detailed information on how to use the ORBISPHERE 32301 cleaning and regeneration center
is included in the related Operator's Manual.
Note: It is mandatory to use the 32301 Sensor Cleaning and Regeneration Center for servicing
electrochemical H
2
sensors. This process is called dechloridization and rechloridization of the electrodes.
See Hydrogen sensor cell cleaning on page 33 .
Always store the sensor with the storage cap and base
installed.
Put a few drops of clean water in the storage cap to prevent
the sensor cell drying.
Figure 12 Model 32301 cleaning and regeneration center