Operational Guide
74
The probe serial number together with the current
reading
Make sure that the probe is polarized, calibrated and the protective cap has
been removed.
Rinse probe.
Submerse the probe in the sample to be tested, make sure temperature probe
is also immersed. Allow reading to stabilize.
The sample should be stirred.
The Dissolved Oxygen value (in %) is displayed
on the 1st LCD line and the temperature on the
secondary LCD.
Press RANGE to change the reading from % to ppm
(mg/L) and vice versa.
Oxygen is consumed during the measurement.
For accurate Dissolved Oxygen measurements, water movement of 0.3 m/s
is suggested. This is to ensure that the oxygen-depleted membrane surface
is constantly measuring representative sample. The use of a magnetic stirrer
is recommended. The probe has a built-in temperature sensor. Make sure it
is also in sample. The measured temperature is indicated on the 2nd LCD line
as shown above. Allow the probe to reach thermal equilibrium before taking
DO
Measurements
DO GLP
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