Thermo Scientific AquaSensors
™
AnalogPlus
™
Dissolved Oxygen Sensor (ppm) User Guide
21
4.
Dissolved Oxygen Sensor Maintenance
4.1.
Cleaning the Dissolved Oxygen Sensor Head
4.1.1.
In order to maintain an accurate measurement value, the sensor will need occasional maintenance.
The maintenance interval will be dictated by the process in which it is installed. The harsher the
process, the more often the sensor will require maintenance. Regular maintenance will yield a longer
sensor life.
4.1.2.
The sensor cleaning procedure is as follows:
4.1.2.1.
Remove sensor from service and rinse or spray it with warm water to remove heavy deposits.
4.1.2.2.
Soak the sensor in a container of warm detergent water for one hour. Do not use detergents that
contain oily skin softeners like aloe or lanolin that can coat the membrane. Alconox
®
and Dawn™
dishwashing liquid work well.
4.1.2.3.
Rinse the membrane end with clean warm water.
4.1.2.4.
If deposits are still present on the membrane repeat soaking and rinsing steps.
4.1.3.
Before returning the sensor to service, allow it to soak in water at ambient temperature for about an
hour to stabilize the Dissolved Oxygen membrane.
4.1.4.
After cleaning the sensor, calibrate sensor per instructions in the AV88 Analyzer manual.
4.1.5.
Reinstall sensor in process.
