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The
OUR
is used to determine the oxygen consumption or respiration rate in water. It is defined as
the mg/L of oxygen consumed per hour.
The following equation is used for
OUR
determination:
where:
DO
START
= Dissolved oxygen level at start of test
DO
END
= Dissolved oxygen level at end of test
t
ELAPSED
= Elapsed time of test in seconds
total volume/sample volume = Dilution factor of sample
Before starting an
OUR
test remember to set the
OUR
configuration from the
Setup
menu (page 19).
This a an example of possible setting. Follow your normal SOP.
Make sure the
DO
probe has been calibrated before using. Clean off probe between samples.
Press
MODE
to select the
OUR
measurement mode. Place the calibrated probe into the airtight container
of sample. Stir the sample. Press
Start
to begin taking measurements.
During the analysis the meter will display the ongoing calculation.
OUR MEASUREMENT
OUR MEASUREMENT
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