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SECTION 3,
continued
Figure 7
DO Probe Assembly
3.3.2 Probe Polarization
Note: If electrolyte does not leak out of the threads, air may remain
inside the module cap. To ensure accurate results, repeat this
procedure using more filling solution.
5. Attach the DO probe cable connector to the input plug at the
top of the meter.
Hach dissolved oxygen probes are continuously polarized when
they are connected to the instrument. A steady reading will not be
seen for 30-50 minutes when the probe electrolyte is new or when
the probe has been unplugged for more than one hour. Interrupted
connections of less than one hour will require 5 to 25 minutes
before a stable reading is observed.
37
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