Xylem MULTI 3500i HANDHELD MULTIPARAMETER METERS - Manual (Page 29)

Multi 3500i Operation
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4.4.2 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 vari-
able 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 Select the pH or mV display with <M>.
pH
6.949
24.8
°C
Measured
variable Reproducibility Response time
pH value Better than 0.01 > 30 seconds