wtw Oxi 3310, Operating Manual

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Operation Oxi 3310
26 ba75804e06 03/2012
4.4.2 Measuring
You can carry out D.O. measurements as follows:
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. When the
salinity correction is switched on, the [Sal] indicator is displayed in the
measuring window.
Note
You can switch the salinity correction on or off and enter the salinity in
the menu for calibration and measurement settings (see section 4.4.3).
Freezing the measured
value (HOLD function)
With the HOLD function, you can freeze the current measured value.
The displayed measured value stops changing until you switch the
HOLD function off.
Note
If the HOLD function is active, you can, e.g. start a manual
measurement with stability control.
1 Perform the preparatory activities according to section 4.4.1.
2 Immerse the D.O. sensor in the test sample.
O
2
7.92
mg/l
25.1
°C
[Sal]
22.09.2008
08:00
Menu
USB output
1 Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.