Operating Manual of Ammonia Nitrogen Sensor
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successful, the measurement data will appear. If the connection fails, “Not Connected” will appear on the
measurement interface.
Chapter 9 Problems and Solutions
Phenomenon
Possibility
Exclusion Method
The value is constant during
the test or fluctuates within
the full range
It might be caused by abnormal
electrode (poor contact, damage,
etc.)
Reassemble the electrode or replace
a new electrode
The value cannot be
stabilized during the test
and fluctuates greatly
during a certain period of
time.
It might be caused by abnormal pH
reference electrode (poor contact,
damage, etc.)
Reinstall or replace the pH electrode
There are air bubbles at the front
end of the electrode membrane
Shake the entire sensor vertically
downwards with a little bit of
strength, so that the bubbles move to
the end without affecting the test.
There might be bubbles affecting
the measurement at the front end of
the electrode
Shake the electrode in water to
remove air bubbles
The test is inaccurate after
using for a period of time
The tip of the membrane might get
contaminated
Rinse the membrane tip with
distilled water or tap water (do not
rinse with high pressure spray head),
then wipe with non-woven
fabric/dust-free cloth.
The electrolyte needs to be
supplemented/replaced
Please replace the supplementary
electrolyte according to the
specifications.