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5.3 DO Probe maintenance
a) First time use of the meter:
To keep the DO probe in the best condition, be sure to fill the
Oxygen Probe, with Electrolyte prior to first use.
b) After using the probe for a certain period:
If the user cannot calibrate the meter properly or the meter‘s
readings are not stable, please check the oxygen probe to see
if the electrolyte in the probe head container has run out or the
diaphragm (inside the probe head) has a problem (e.g. is dirty).
If yes, please fill the electrolyte or change the diaphragm set.
Then re-calibrate.
Diaphragm (probe head including diaphragm set):
A key component of the oxygen probe is the thin Teflon diaphragm
housed in the tip of the probe. This diaphragm is permeable by
oxygen molecules but not by the considerably larger molecules
contained in the electrolyte. Accordingly oxygen may diffuse
throughout the electrolyte solution contained in the probe, and its
concentration may be quantified by the measurement circuit. This
sensitive diaphragm is rather delicate and is easily damaged if it
comes into contact with solid objects or is subjected to knocks. If
the diaphragm is damaged or the electrolyte has run out, please see
following procedure:
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