Version 1 .0
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Figure 27.
6.5.4
Instrument Memory Parameters
The Memory can be changed by altering an individual cell and pressing enter. The cell must turn yellow, The Memory parameters must then be
updated.
The Memory parameters must then be Written/Reload, which will turn red as it is rewriting. The
BOD-300
software must then be restarted.
6.5.5 QC Controls
None/EPA/ISO: Select input default QC criteria for method selected (EPA or ISO).
“Blank (depletion)”:
for bottles of Type: Blank, maximum allowed oxygen depletion
in the blank. Larger blank depletion values will be flagged as invalid.
Default values:
EPA: 0.2 mg/L O
2
ISO: 1.5 mg/L O
2
“Seed (depletion)”:
for bottles of Type: Seed Control, minimum allowed oxygen depletion in the
seed controls. Smaller seed control depletion values will not be used to
calculate the seed contribution factor.
Default values:
EPA: 2 mg/L O
2
ISO: 2 mg/L
“Sample (depletion)”:
for bottles of Type: Sample, minimum allowed oxygen depletion in
the sample. Smaller sample depletion values will be flagged as invalid.
Default values:
EPA: 2 mg/L O
2
ISO formula: (DOI/3)
≤
Sample(depletion)
≤
(2*DOI/3)
“DO (Final)”:
Minimum allowed dissolved oxygen concentration at Day 5/Day7. Lower
final DO values will be flagged as invalid.
Default values:
EPA: 1 mg/L O
2
ISO: 1 mg/L
“QC Sample (BOD5)”:
for bottles of Type: QC Sample. Tolerance range for Glucose-Glutamic
Acid standard BOD5 concentrations. Values beyond this range will be
flagged as invalid.
Default values:
EPA: 198 ± 30.5 mg/L O
2
ISO: 210 ± 40 mg/L O
2
for BOD5
225 ± 40 mg/L O
2
for BOD7
