wtw Multi 350i, Operating Manual

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Multi 350i Operation
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Note
The ConOx double sensor can perform the salinity correction automat-
ically. The conductivity module of the sensor measures the salt content
of the test sample simultaneously with the DO. The measuring instru-
ment takes the measured value into account.
AutoRead
(drift control)
The AutoRead function (drift control) continually checks the stability of
the measurement signal. The stability has a considerable impact on the
reproducibility of measured values. The display of the measured vari-
able flashes until a stable measured value is available.
Criteria With identical measurement conditions, the following applies:
4.6.3 Settings for DO sensors
Overview The following settings are possible for DO sensors:
!
Salinity correction
!
Salinity (salinity equivalent)
!
Calibration interval
!
Comparison measurement
Measuring mode Reproducibility Response time
DO concentration better than 0.05 mg/l > 10 seconds
DO saturation in-
dex better than 0.6 % > 10 seconds
DO partial pres-
sure Better than 1.2 mbar > 10 seconds