Version 1 .0
28 |
Figure 28. Qc parameters.
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“Blank (depletion)”: Sets the maximum allowed oxygen depletion in the blank. Blank depletions above this value will be flagged as invalid.
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“Seed (depletion)”: Sets the minimum allowed oxygen depletion in the seed controls. Seed controls with depletion values below this will
not be used to calculate the seed contribution factor.
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“QC Sample (BOD5)”: Sets the tolerance range for standard BOD5 values. Values beyond this range will be flagged as invalid.
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“Sample (depletion)”: Sets the minimum allowed oxygen depletion in the sample. Samples with depletion values below this will be flagged.
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“DO (Final)”: Sets the minimum allowed dissolved oxygen concentration during Day 5 measurements. Bottles with final DO values below
this will be flagged as invalid.
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“Temperature MAX”: Max. allowed temperature for samples. Samples above this value will be flagged.
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“Temperature MIN”: Min. allowed temperature for samples. Samples below this value will be flagged.
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“Stirring time”: Sets the stirring time during DO measurement, and should match equilibration time for the BOD probe.
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If the Day0 measurement of the bottle is not within the remeasure range as defined in Utilities, the bottle in in question turns orange.
The system will prompt the user that bottles have not passed criteria and will give the user the opportunity to remeasure the bottles in
question. The probes will wash between each bottle.
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In Remarks, a bottle which failed measuring criteria will be marked with <R>. If remeasured and bottle passed the criteria, <RM> will
appear to the right of <R>.
6.5.6 Parameters
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Seed pump speed: Power setting of the seed pump. Adjusted when installing a new seed pump.
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Timing delay of the dilution water pump. Measured at installation of the pump.
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Stabilization time of the dissolved oxygen probe. Default value: 22 seconds.
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Autofill: Activates or deactivates the autofill sensor
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Cap/Decap: Activates/deactivates the Cap/Decap accessory on each of the runs.
Figure 29. Parameters.
Figure 30. Stability Parameters.
The DO probe use the following criteria to measure a sample. It will take 5 measurements and when the measurements are all with in the
sensitivity level the reading is populated on the results page. The factory recommended sensitivity is 95%. The Max. Time is the longest time
that a BOD probe will attempt to reach stability. If measurement stability is not reached after this time, the software will note the sample as "not
stable".
