Measuring The Ph Value - wtw pHotoFlex pH Operating Manual

®
pHotoFlex pH
AutoRead
(Drift control)
Criteria
ba75975e05 10/2017

4.6.2 Measuring the pH value

1 Perform the preparatory activities according to section 4.6.1.
2 Immerse the pH electrode in the test sample.
pH & ORP \ pH
6.94
25.0
[AR]
01.02.05 15:12
3 Press the <M> key (short pressure) repeatedly until the mea-
sured variable, pH is selected.
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.
With identical measurement conditions, the following applies:
Measured
parameter
pH value
°C
Reproducibility
Better than 0.01
Operation
Response time
> 30 seconds
51