37
SOUR
The 5100 uses the following formula to calculate the SOUR value:
OUR
=
Where:
DO
START
= Dissolved oxygen level at start of test
DO
END
= Dissolved oxygen level at end of test
T
ELAPSED
= Elapsed time of test in seconds
= Dilution factor of sample (entered in setup screen as Sample/Total)
SOUR =
Where:
Solids Weight = Total Solids or Volatile Suspended Solids in g/L
From the Model 5100 Application mode menu press the [SOUR] (Specific Oxygen Uptake Rate)
soft-key. The following screen will be displayed.
2.8
mg
/h /g
25.37°C 9.12
0:00
START
SETUP
REVIEW
SEND
DO
START
- DO
END
T
ELAPSED
mg/L/h
3600 Sec
1 Hour
Total Volume
Sample Volume
x
=
x
Total Volume
Sample Volume
OUR
Solids Weight =
mg/h/g (mg O
2
/ hour / g solids)
SEND: off
SOUR
mg
/L
