wtw pHotoFlex, Operating Manual

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Operation pHotoFlex / pHotoFlex Turb
52 ba75491e05 04/2009
4.6.2 Measuring the pH value
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 pa-
rameter flashes until a stable measured value is available.
Criteria With identical measurement conditions, the following applies:
1 Perform the preparatory activities according to section 4.6.1.
2 Immerse the pH electrode in the test sample.
3 Press the <M> key (short pressure) repeatedly until the mea-
sured variable, pH is selected.
pH & ORP \ pH
6.94
25.0
°C
[AR]
01.02.05 15:12
Measured
parameter Reproducibility Response time
pH value Better than 0.01 > 30 seconds