multi X 2500
Maintenance and care
105
10.4.7
Clean and store the electrode
Refer to the chapter "combined electrode" S. 93 on page for information on the
maintenance of the combined electrode.
Observe the following instructions when servicing the sensor electrode:
Keep the sensor electrode permanently wetted to prevent the diaphragm and the
silver ring from dehydrating.
Keep the sensor electrode in the storage container in the chlorine module door
filled with a 0.6 mol/l Na
2
SO
4
solution during measurement pauses and outages
≥ 1 day.
If the device will remain idle for a longer period of time, fill the wetting cap with
distilled water. To do this, close the refilling port for the internal electrolyte and
carefully introduce the sensor electrode into the wetting cap.
Check the filling level of the internal electrolyte once per week. When the sensor
electrode is inserted the filling level should remain visible above the cover of the
measuring cell.
If required, use the refilling port to top up with 0.6 mol/l Na
2
SO
4
solution or replace
the solution:
The solution should preferably be refilled at the end of a working day or the end of
a working week since the electrode should be allowed a stabilization time of 2 to
24 hours depending on its degree of aging.
Top up at least until above the ground surface of the sensor electrode or ideally
until just below the refilling port. Close the refilling port. Carefully swing the filled
sensor electrode back and forth to mix the internal electrolyte.
Observe the instructions in the user manual for the sensor electrode.
Make sure that the opening for the salt bridge of the platinum electrode is not
obstructed. Otherwise, the electrode is maintenance-free.
Wipe the silver surface with cellulose after use. Otherwise, the electrode is
maintenance-free. The silver electrode is consumed with time when in operation and
must be replaced as required.
Sensor electrode
Platinum electrode
Silber electrode
