Xylem MULTI 3500i HANDHELD MULTIPARAMETER METERS - Manual (Page 30)

Operation Multi 3500i
28
4.4.3 Measuring the ORP voltage
Note
ORP electrodes are not calibrated. However, you can check ORP elec-
trodes using a test solution.
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 Submerse the ORP electrode in the sample.
3 Select the mV display with .
U
157.0
mV
24.8
°C
Measured variable Reproducibility Response time
ORP voltage better than 0.6 mV > 30 seconds