Section 7 Troubleshooting - Hach BODTrak II User Manual

Section 7
Incorrect BOD curves through a 10 day test period are shown in
typical curves refer to
1 High oxygen demand
2 Nitrification
3 Excessive time lag
Troubleshooting
Figure 4 on page 32.
Figure 5 Incorrect BOD curves
4 Initial sample temperature below
º
20 C or supersaturated with
oxygen
5 Bottle leak
Figure 5. For
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