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

Multi 3500i Operation
27
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 .
pH
6.949
24.8
°C
Measured
variable Reproducibility Response time
pH value Better than 0.01 > 30 seconds