Dissolved oxygen inoLab
®
Multi 9620 IDS
74 ba77173e04 12/2017
8.2.4 Evaluation
The evaluation is based on the accuracy required by the used. Together with
the nominal value (100 %) this results in a validity scope for the check.
If the measured value is within the validity scope, no cleaning or user
calibration is required.
If the measured value is outside the validity scope, the sensor shaft and
membrane should be cleaned, and the check should then be repeated
(see section 5.4.1).
Example:
– Required accuracy: ± 2 %.
– In water vapor-saturated air or in air-saturated water, the nominal value is
100 % (while taking into account the local air pressure).
– Therefore, the validity scope is 98 ... 102 %
– The check resulted in a measured value of 99.3 %
The measurement error is within the specified validity scope.
No cleaning or user calibration is required.
4. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter flashes.
5. Wait for the end of the AutoRead measurement ([HOLD][AR]) status indi-
cator or
take over the measured value with <ENTER>.
The measured value is frozen.
6. Switch to the measured value display with <M>.
The check measurement is not documented.
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