wtw MultiLab P5, Operation Manual

Page: 115 / 251

Oxygen measurement Oxygen measurement
114
BA61101/08.00/IWa/MLP5-E2 BA61101/08.00/IWa/MLP5-E2
115
Other calibration procedures and corrections
H
2
O-Cal: Calibration in air-saturated water
Immerse oxygen probe into air-saturated water!
Care for incident flow!
Ãmeth.
Âmenu
ÀCal
ÁOº m¥/L 25.4°C
AR
Menu oxygen
measurement.
HºO-Cal
ÂOº
Sal
¡OxiCal
Select calibration.
Oº-Ref
ÂOº
OxiCal
¡HºO-Cal
Select calibration
procedure H
2
O-Cal.
AR
HºO-Cal
S= 0.983
T= 21.6°C
Start calibration in air-
saturated water.
AR
: Meas. values "running".
¡AR
ÂOº
S= 0.983
T= 21.6°C
Wait until
¡
appears before
AR
: Calibration terminated
(signal sound). The
determined data are stored.
Ãmeth.
Âmenu
ÀCal
ÁOº m¥/L 25.4°C
AR
Confirm calibration and
back to menu oxygen
measurement.
O
2
Reference: Calibration against a known (titrated)
concentration value
Information on the solubility function:
The solubility of oxygen depends on the solvents, the dissolved
agents and the temperature. Oxygen partial pressure and
temperature are measured. The concentration is calculated according
to the solubility function for pure water (or seawater respectively)
stored in the instrument.
The solubility factor indicates the relative concentration difference to
pure water (or seawater).
Except for pure water the displayed concentration value is valid for
solutions of the same composition at calibration temperature only.
Immerse oxygen probe into solution with known
oxygen concentration!
Care for incident flow!
HºO-Cal
ÂOº
Sal
¡OxiCal
Select calibration.
With
or select
calibration procedure O
2
reference.
F= .000
ÂOº
Oº= 10.2m¥/L
É
Confirm selection.
Display of the current
oxygen concentration.
F= .954
ÂOº
Oº= 9.7m¥/L
È
Change factor until the
correct oxygen
concentration is set.
: Select figure
: Set figure.