Dissolved oxygen
Multi 3620 IDS
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10/2021
7
Dissolved oxygen
7.1
Measuring
7.1.1 Measuring D.O.
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.
You have the following options to measure the salinity:
Measurement of the salinity with an IDS conductivity sensor.
If the measured value from an IDS conductivity sensor is taken over, the sta-
tus indicator [Sal
↑
] is displayed in the measurement window of the IDS oxy-
gen sensor. The status indicator [Sal
↓
] is displayed in the measurement
window of the IDS conductivity sensor.
Manual determination and input of the salinity.
The sensor connection and the USB-B (
USB Device
) interface are
galvanically insulated. This facilitates interference-free measure-
ments also in the following cases:
Measurement in grounded test samples
Measurement with several sensors connected to one
Multi 3620 IDS in one test sample
1.
Connect the D.O. sensor to the meter.
The D.O. measuring screen is displayed.
2.
Check or calibrate the meter with the sensor.
3.
Immerse the D.O. sensor in the test sample.
30.09.2012 08:00
Info
You can switch the salinity correction on or off and enter the salinity
in the menu for calibration and measurement settings (see section
11.4.1).
