Calibration Procedure - wtw Oxi 1970i Mode D'emploi

Oxi 1970i
Calibration data
sets
Calibration
procedure
Sensor evaluation
Display
Relative slope

Calibration procedure

The Oxi 1970i administrates two sets of calibration data:
Set 1, for sensor type 1:
Set 2, for sensor type 2:
Sensors of different types can be calibrated separately from one another.
When a sensor of one type is calibrated, the calibration data of the other type
remain stored. The Oxi 1970i recognizes the type of the connected sensor
and automatically uses the correct calibration data.
2 calibration procedures are available:
Calibration in water vapor-saturated air. Use the OxiCal
calibration vessel (accessory) for the calibration.
Calibration via a comparison measurement (e. g. Winkler titration
according to DIN EN 25813 or ISO 5813). At the same time, the relative
slope is adapted to the comparison measurement by a correction factor.
After the calibration, the measuring instrument evaluates the current status
of the sensor against the relative slope. The evaluation appears on the
display. The relative slope has no effect on the measuring accuracy. Low
values indicate that the electrolyte will soon be depleted and the sensor will
have to be regenerated.
S = 0.8 ... 1.25
Note
The measuring instrument automatically recognizes the type of the
connected oxygen sensor (CellOx325 or DurOx325).
– Oxygen depth armature,
– CellOx 325, or
– StirrOx G
– DurOx 325
S = 0.7 ... 0.8 S = 0.6 ... 0.7
Calibration procedure
®
-SL air
E3
Invalid
calibration
S < 0.6 or
S > 1.25
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