Calibration Of Redox Electrode - Burkert 8206 Manuel D'utilisation

4 OPERATION

4.2.2 Calibration of redox electrode

In order to obtain reliable measurements, it is necessary to perform regular calibrations of
the redox electrode.
A buffer solution is necessary to calibrate the reference value, we recommand the choice of
a buffer value as close as possible to the required final redox potential value. Before each
calibration, clean the electrode (see §5.2).
This maintenance procedure is very important to ensure a reliable control operation.
The frequency of calibration depends upon the degree of contamination of the measuring
fluid, in normal operations conditions, calibration should be repeated once a week.
ORP CAL.
Press Enter
for 5 sec.
235 mV
ENTER
The message "WARNING" at the end of
calibration indicates a buffer solution error or
advanced ageing of the electrode. In the latest
case, a replacement of electrode must be
anticipated. In normal conditions, the message
"WARNING" appears then the electrode has
reached the half of its lifetime (i.e. an Offset
value between -60 mV and
-35 mV or between 35 mV and 60 mV).
To escape electrode calibration, press
sign can be changed as numbers.
-0000 mV
ENTER
0......9
230 mV
ENTER
ORP CAL.
ENTER
OFF = -20
0......9
E-25-
REDOX TRANSMITTER 8206
Enter buffer value
Immerse electrode in buffer
solution and confirm
Automatic confirmation (approx. 20 s.) or
press ENTER
ERROR
WARNING
or
ENTER
The message "ERROR" at the end of
calibration indicates a buffer solution error
or that the electrode is out of tolerance.
The message is displayed when the Offset
value is < -60 mV or > 60 mV. In this case,
values of previous calibration are kept. The
electrode must be changed, otherwise the
measured values would be erroneous.
for 2s. Previous calibration values are kept. The