Difference between revisions of "Zero calibration"
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Revision as of 07:47, 24 September 2010
Zero calibration is together with air calibration one of the two steps of the POS calibration, see [MiPNet12.08]. It is done at closed chamber after all the oxygen has been removed by the addition of dithionite. A zero calibration is the last part of the sensor test and described in detail there. Unlike air calibration it is not necessary to perform a zero calibration each day.
A zero calibration should be performed
- from time to time as a record of instrumental performance: use the template [O2k-Calibration-list].
A zero calibration has to be performed
- when a new or serviced POS is used for the first time
- when a new membrane was applied to the sensor
- when the gain is changed
- when a new POS connector is used
