
Integrated Multi-parameter Sensor Operation manual
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7.1.5 Depth sensor maintenance
Clean the surface of sensor by water. If it is still dirty after cleaning, please wipe by wet soft cloth. It is
noteworthy that the sensor cannot touch the corrosive solution in the process of maintenance, otherwise
the function of the sensor will be damaged.
7.1.6 Standard optical sensor maintenance
Standard optical sensors include turbidity, chlorophyll and blue-green algae sensors.
The optical probe requires periodic maintenance and should be performed after each measurement cycle
(long-term online measurement). The measurement cycle should be adjusted according to the pollution
level of the measurement area. The probe should also be maintained before and after calibration.
Rinse the entire probe with clean water and wipe off the attachment on the surface of the instrument with
soap and water. Soak the entire instrument in clean water for at least 5 minutes. Observe the optical
window of the probe, clean the optical window of the probe with a tissue paper or cotton swab dipped in
soapy water, then rinse with water and allow it to dry.
IMPORTANT: Do not scrub the probe with an organic solvent such as acetone or methanol to avoid
damaging the plastic surface of the probe.
7.1.7 Ion Sensor Maintenance
Ion sensor includes sensors of ammonia nitrogen, nitrate ion, fluoride ion, and chloride ion.
If the electrode is away from the water by about 15 minutes, then, it is recommended to place the
electrode into the water again to regenerate for 1 hour. If the electrode membrane cap is contaminated, the
user needs to clean the cap according to the maintenance cycle. Do not touch the cap by hand. Please
clean the cap by clean cloth or clean water. Usually, for the ion electrodes adopting PVC ion exchange
membranes, it is necessary to replace the membrane head by half a year (the time depends on the situation
of using of electrode).