46
• The Current dissolved oxygen measurement of the
incubated sample will be made.
• Press
to apply dilution corrections and calculate
BOD.
• The message ”Please wait until DO reading is stable”
may appear.
Note: If
appears instead of
, the
incubation period was less than 24 hours and calcu-
lation will not be possible. After pressing the
the message “Repeat Initial Reading.” appears. If
replacing Initial BOD is required then press
otherwise press
.
• Remove probe from sample and rinse with purified
water. Press
to analyze another prepared
sample or seed.
The list will reflect the 5 day analysis.
Note: No Seed correction is made in these calculations at this step. This may be made manually
by subtracting the seed concentration from the samples, or made automatically with the meter
(see SEED CORRECTION section).
To print a copy of the BOD analysis of the sample:
• Use
HI92000
software to connect the
HI5421
meter.
• Select BOD sample from available BOD samples.
• Press
to have a paper copy of analysis.
BOD MEASUREMENT
