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Section 6
6.1 Maintenance Schedule
Maintenance Task
1
Clean the sensor
Inspect sensor for damage
Replace sensor
Replace sensor O-rings
Calibrate Sensor (as required by regulatory agency)
1
Cleaning frequency is application dependent. More or less frequent cleaning will be appropriate in some applications.
6.2 Cleaning the Sensor
6.2.1 Cleaning the Galvanic Sensor
6.3 Preventing the Sensor Membrane from Drying Out
Maintenance
DANGER
Only qualified personnel should conduct the tasks described in this section of the
manual.
Clean the exterior of the sensor with a stream of water. If debris remains, wipe with a soft,
wet cloth.
Clean the sensor membrane before each calibration to ensure best results. Clean and
calibrate monthly or until operating experience determines appropriate intervals.
Using a soft wet cloth and mild soap solution, remove all debris from the membrane
surface. Rinse thoroughly with distilled water.
Note: While cleaning the sensor membrane, be careful not to puncture it.
When the sensor is removed from the process solution, its membrane immediately begins
drying out. After more than 24 hours, the electrolyte behind the membrane may become
depleted due to evaporation. If the sensor is returned to operation after this has occurred,
measurement readings may be inaccurate.
Membrane dry-out and electrolyte evaporation can be avoided by temporarily placing the
sensor in a container of clean drinking water until it can be put back into operation.
90 days
120 days
x
x
x
Per the schedule mandated by your regulatory
agency.
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365 days
x
35
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