YSI BOD Analyst Pro - Manual (Page 78)

YSI BOD Analyst Pro ® User Manual 78
After storing a reading to one bottle be sure that you move the DO probe to the next bottle
immediately. Of course, use your lab protocol for cleaning the probe between bottles as
prescribed. The advantage to moving the bottle right after a reading is that the probe can be
equilibrating to the next solution while you are entering the bottle number.
The Auto stabilization routine starts immediately after the bottle number is entered. You can
choose exactly how and when a stable reading will be stored. This is the fastest technique by
which to take BOD readings.
The Dual technique requires minimum stabilization criteria to be met but also requires you the
user to ACCEPT/CONFIRM that the reading may be stored. You may ACCEPT/CONFIRM prior
to the minimum stabilization time, but this is a two-action (dual) operation to enter and store a
DO reading.
The Manual technique does not require stability criteria to be met. When you press
ACCEPT/CONFIRM either in the program or at the YSI 5100 if applicable, the DO reading at
that moment is entered and stored. The 5100 displays STBL on its display if using this technique.
The None technique option does not apply stability criteria and enters and stores the DO reading
when you press ACCEPT/CONFIRM and does not display STBL if using the YSI 5100.
See Section 10.5 (YSI Instrument Parameters Form) for more detailed instructions.
10.3 THE CRITERIA FORM
BOD testing can be complicated due to the number of criteria that tests must meet for acceptance.
The BOD Analyst Pro software checks tests for compliance with many of these criteria. These
criteria are defined in the Criteria Setup form. Default values are based on values recommended
in Standard Methods for the Examination of Water and Wastewater. However, values may be
changed to meet requirements of state or local regulating agencies.