Xylem Multi 3430 - Manual (Page 73)

Multi 3430 Operation
73 ba75865e11 02/2011
Evaluation The evaluation is based on the accuracy required by the user. 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 air-saturated water, the nominal
value for the relative D.O. saturation (abbreviated: saturation) is
100 %.
– 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
5 Wait for the AutoRead measurement to be completed
([HOLD][AR]) display or
accept the measured value with
6 Switch to the measured value display with
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