Xylem CG 842 - Manual (Page 23)

Operation
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Note
The current AutoRead measurement (with acceptance of
the current value) can be terminated at any time by pressing
<run/enter>.
4.2.2 Measuring the Redox voltage
The pH meter can measure the Redox voltage (mV) of a so-
lution when connected with a Redox electrode, e.g.
BlueLine 31 Rx.
Note
Redox electrodes are not calibrated. However, you can
check Redox electrodes using a test solution.
1 Perform the preparatory activities according to sec-
tion 4.2.
2 Immerse the Redox electrode into the test sample.
3 Press the <pH> key repeatedly until U appears in the
status line.
The Redox voltage (mV) of the sample appears on
the display.
4 Wait for a stable measured value.