7.8.2 Oxygen sensor polarization device
The internal (oxygen sensor) device is automatically charged during the probe ON periods. If the probe
is not in use for more than five days, the device must be recharged by keeping the probe ON for at least
10 minutes.
7.9 ROUTINE MAINTENANCE SCHEDULE
The most important maintenance actions to be periodically carried out are listed below.
Monthly maintenance
❖ Replace electrolyte of the oxygen sensor.
❖ Check that pH and reference sensors be protected by proper caps and solutions, if not in use.
❖ Recharge the oxygen polarization device by keeping the probe ON for few minutes.
Quarterly maintenance
❖ Replace the oxygen membrane.
❖ Check the pH channel and renew the pH sensor, if necessary.
❖ Clean the flow cell of the conductivity sensor.
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