wtw Oxi 7310, Operating Manual

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Dissolved oxygen Oxi 7310
22
ba75931e03 12/2011
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.
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. When the salinity correction is
switched on, the
[SAL]
indicator is displayed in the measuring screen.
1. Connect the D.O. sensor to the meter.
The D.O. measuring screen is displayed.
D.O. measurements can be carried out with the CellOx 325 /
StirrOx
®
G or DurOx 325 D.O. sensor.
The meter automatically recognizes the type of the connected D.O.
sensor.
2. If necessary, select the measured parameter with
<M>
.
3. Immerse the D.O. sensor in the test sample.
4. If necessary, select the measured parameter with
<M>
.

D.O. concentration [mg/l]

D.O. saturation [%]

D.O. partial pressure [mbar].
O
2
7.92
mg/l
25.1
°C
[CellOx]
01.07.2011
08:00
Menu
USB output
You can switch the salinity correction on or off and enter the salinity
in the menu for calibration and measurement settings (see section
6.1.1 C
HANGING THE SETTINGS FOR
D.O.
SENSORS
, page 30).