Maintenance
45
Waltron User Manual 101-045-E.1
9031CX Sodium Analyzer
Fit the ‘O’ ring and sleeve and return the electrode to the flowcell. Prior to performing a calibration, run
the monitor for one to two hours on low level sodium sample. No further calibration should be needed
until the next reactivation procedure.
This procedure must be carried out at regular monthly intervals and the process started as soon as a new
electrode is put into service.
ATTENTION
It is extremely difficult to recover an ‘old’ electrode.
As the buffer solution, is replaced monthly, the following procedure should be carried out 24 hours after
replenishment to allow pH stability to be achieved.
This procedure applies to both ammonia and amine buffered systems.
4.5.3
SHUT-DOWN PROCEDURE (PROLONGED SHUT-DOWN, 1+ MONTHS)
Close the sample valve upstream of the monitor.
Remove the buffer container and safely dispose of the solution. Rinse the containers thoroughly.
WARNING
For safe handling instructions of buffer solutions refer to Section 4.
Fill the Low Sodium Standard (100ppb) calibration solution container with high purity water and do a
single point calibration to flush the system.
Remove the electrodes and follow procedure in Section 5.6.1.
Use a syringe to flush all tubing with high purity water. This removes any particulate deposits.
Switch off the main power supply to the Transmitter Unit.
4.5.4
STORING THE ELECTRODES
Fill the rubber teat, supplied with the sodium electrode, with 5M sodium solution. Push the teat over the
end of the electrode. For storing the refillable reference electrodes, fill the rubber teat with the refillable
solution and push teat onto the end of the electrode. Refit the filling hole plug to seal the refill aperture.
For storing the Gel-filled reference electrode, fill the rubber teat with a dilute KCl solution (part number
N1234-547) and push teat over the end of the electrode.
TIP
Do not let either electrode dry out.
