Cleaning the Optical Window
Storage
Clean the optical window only when changing the sensor cap.
1 Remove the cap.
2 Gently wipe the sensing window with the supplied lens cloth.
Do not wet the lens with any liquid.
Prior to installation, store the sensor body and cap in the factory supplied containers.
Once installed on the sonde, the RDO sensor can be stored wet or dry depending on the sensor
configuration of the sonde.
Never store the RDO sensor without the sensor cap once it has been installed on the sonde.
Soaking the sensor in vinegar for longer than one hour can cause serious damage.
Cleaning and Storing the Conductivity Sensor
Begin with the most gentle cleaning method and continue to the other methods only if necessary.
To clean the conductivity sensor face, gently rinse with clean, cold water. If further cleaning is required,
consider the nature of the debris.
To remove crystalline deposits:
1 Clean the sensor face with warm water and mild soap.
2 Use a soft brush to gently clean the sensor pins and temperature button. Ensure removal of all debris
around the base of the pins and button.
3 If crystalline deposits persist, soak in 5% HCl for 10 to 30 minutes followed by warm soapy water and soft
brushing.
4 If deposits persist, alternate soaking in 5% HCl and 5% NaOH solutions followed by warm soapy water and
soft brushing.
• Clean the sensor face with warm water and mild soap.
• Using a soft brush, gently clean the sensor pins and temperature button. Ensure removal of all residue
around the base of the pins and temperature button.
• Isopropyl alcohol may be used for short soaking periods, up to one hour.
• Do not soak in strong solvents such as chlorinated solvents, ethers or ketones (such as acetone).
• Clean the sensor face with warm water and mild soap.
• Using a soft brush, gently clean the sensor pins and temperature button. Ensure removal of all material/
film around the base of the pins and temperature button.
• Soak the sensor in 0.10% HCl for 10 minutes and then rinse thoroughly with distilled water.
To remove oily or greasy residue:
To remove protein-like material, or slimy film:
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