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6 Maintenance
6
Maintenance
6.1
Removal of the sensor
NOTE!
Before removing the sensor from the process (the fitting), make sure that no process medium can es-
cape during removal.
NOTICE!
Risk of damage to the sensor due to process medium entering during improper removal
A sensor cap that does not seal can cause damage to the sensor due to process medium entering.
To remove the sensor, never turn the sensor at the sensor head or sensor body, but only at the sen-
sor union nut. Especially when removing the sensor from the suspended or immersion fitting, the
sensor cap may otherwise come loose and liquid may enter the inside of the sensor!
6.2
Cleaning the sensor
NOTE!
Maintenance of the sensor may only be carried out by qualified personnel!
If it is necessary to move the measured value during operation, you should first check the sensor for any
deposits and contamination, clean it, and recalibrate it if necessary.
Please observe the following notes during ongoing operation of the sensor:
•
Always keep the sensor clean, especially in the area of the optical membrane. The presence of a
biofilm on the sensor cap can lead to measuring errors.
•
Clean a dirty sensor cap membrane with warm water containing detergent. Use a soft sponge for
cleaning (not an abrasive scouring pad with grinding effect).
•
If you take the sensor out of service, rinse it before storing it.