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SECTION 3,
continued
Figure 6
DO Probe Assembly
3.3.2 Probe Polarization
Hach dissolved oxygen probes are continuously polarized when
they are connected to the instrument. A steady reading will not be
seen for 30 to 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.
With the probe in the calibration and storage chamber, observe
the mg/L dissolved oxygen concentration after the probe has been
polarized for the appropriate period of time. Calibration may be
performed when the display is stable for several minutes.
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