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COM280
12.4 Calibration
You calibrate the sensor in water vapor-saturated air.
1.
Insert the sensor into the calibration beaker.
2.
Press <CAL>.
The oxygen calibration mode appears (display shows O2 CAL).
3.
Press <RUN/ENTER>.
The AutoRead measurement begins. If the measured value is stable, the instrument
displays the value of the relative slope and the sensor evaluation.
The
relative slope has no effect on the measuring accuracy. Low values indicate that the
electrolyte will soon be depleted and the probe will have to be regenerated.
Sensor evaluation:
Display
E3 (invalid calibration)
4.
Switch back to the measuring mode with <M>.
Endress+Hauser
Relative slope
S = 0.8 to 1.25
S = 0.7 to 0.8
S = 0.6 to 0.7
S < 0.6 or S > 1.25
Commissioning
25
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