Maintenance
Hauser
21
7.3
Cleaning the sensor
The measurement can be corrupted by sensor fouling or malfunction, e.g.:
• --> cause longer response times and a reduced slope under certain circumstances.
To ensure reliable measurement, the sensor must be cleaned at regular intervals. The frequency and
intensity of the cleaning operation depend on the measuring medium.
Clean the sensor:
• before every calibration
• at regular intervals during operation as necessary
• before returning it for repairs.
Depending on the type of soiling, proceed as follows:
After cleaning, rinse the sensor with copious amounts of clean water.
7.4
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.
Type of soiling
Cleaning
Salt deposits
Immerse the sensor in drinking water or in 1-5% hydrochloric acid
for a few minutes. Afterwards, rinse it with copious amounts of water.
Dirt particles on the sensor body
(not cap!)
Clean the sensor body mechanically with water and a suitable brush.
Dirt particles on the membrane body or the
membrane
Clean with water and a soft sponge.
Measure
Reason
Replacing the sealing ring
Visible damage to the sealing ring
Changing the electrolyte
Unstable or implausible measuring signal or fouling of the electrolyte
Replacing the membrane cap Membrane is damaged or can no longer be cleaned (hole or overstretching)
