Endress+Hauser Oxymax COS22D, Руководство по эксплуатации

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Commissioning Oxymax COS22D
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Hauser
6.3 Calibration
Calibrate the sensor (air calibration) immediately after the polarization time has elapsed.
The calibration intervals depend heavily on:
• The application and
• The installation position of the sensor.
The following methods help you determine how long the calibration intervals should be:
1.
Check the sensor one month after its being put into operation by taking it out of the fluid, drying
it and then measuring the oxygen saturation index at air after 10 minutes.
Decide using the results:
a. If the measured value is not at 100 ± 2 %SAT, you have to calibrate the sensor.
b. Otherwise, double the length of time to the next inspection.
2. Proceed as per Point 1 after two, four and/or eight months. In this way, you can determine the
optimum calibration interval for your sensor.
Be sure to calibrate the sensor at least once a year.