wtw Oxi 3315, Operating Manual

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Dissolved oxygen Oxi 3315
24
ba75944e02 03/2012
5 Dissolved oxygen
5.1 Measuring
5.1.1 Measuring D.O.
NOTE
When connecting a grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect. The USB
interface is not galvanically isolated.
Selecting the
displayed
measured parameter
You can switch between the following displays with
<M>
:
 D.O. concentration [mg/l]
 D.O. saturation [%]
 D.O. partial pressure [mbar].
Salinity correction
When measuring the concentration of solutions with a salt content of more than
1 g/l, a salinity correction is required. For this, you have to measure and input
the salinity of the measured medium first.
1. Connect the D.O. sensor to the meter.
The D.O. measuring window is displayed.
2. If necessary, select the measured parameter with
<M>
.
3. Check or calibrate the meter with the sensor.
Only in special cases does the FDO
®
925 D.O. sensor require cal-
ibration. A regular FDO
®
check is sufficient.
4. Immerse the D.O. sensor in the test sample.
Info
01.09.2011
08:00
USB output
[t90= 30 s]
If D.O. concentration [mg/L] is selected as the measured parame-
ter, lower concentrations (under 1 mg/L) are automatically dis-
played with a higher resolution (0.001 mg/L).