Endress+Hauser Oxymax COS61D, Operating Instructions Manual

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Oxymax COS61D Maintenance
Hauser 27
Clean the sensor:
• Before every calibration
• At regular intervals during operation as necessary
• Before returning it for repairs
Type of contamination Cleaning
Salt deposits 1. Immerse the sensor in drinking water or in 1-5 % hydrochloric
acid (for a few minutes).
2. Then rinse it with copious amounts of water.
Dirt particles on the sensor shaft and
shaft sleeve (
not fluorescence cap! )
‣
Clean sensor shaft and sleeve with water and a suitable sponge.
Dirt particles on fluoresence cap
‣
Clean the fluorescence cap with water and a soft cloth.
‣
After cleaning:
Rinse with copious amounts of clean water.
10.4 Cleaning sensor optics
The optics need to be cleaned only if medium has penetrated a defective fluorescence cap.
1. Unscrew the protection guard and fluorescence cap from the sensor head.
2. Carefully clean the optical surface with a soft cloth until the buildup is fully removed.
3. Wipe the optical surface with a soft cloth that is wetted with drinking water or
distilled water.
4. Dry the optical surface and screw on a functional fluorescence cap.
5. At the transmitter, execute the
Sensor cap change command and then perform the
necessary calibrations.
NOTICE
Damage, scratches on optical surface
Distorted measured values
‣
Make sure that the optical surface is not scratched or damaged in any other way.
10.5 Wear parts and consumables
Parts of the sensor are subject to wear during operation. By taking suitable measures, you
can restore the normal operating function.
Corrective action Reason
Replace process seals Visible damage to a process seal
Replace fluorescence cap Fluorescence layer is damaged or can no longer be cleaned (black protective layer is
damaged to the point that the pink fluorescence layer is visible)
10.5.1 Replacing sealing rings
It is compulsory to replace the sealing ring if it is visibly damaged. Only use original sealing
rings (O-ring kit: Order No.: 51518597).
10.5.2 Replacing the fluorescence cap
The typical operating life of a fluorescence cap is more than 2 years. The sensor checks
whether the cap is aging and issues a warning via the transmitter if the rate of aging