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CLEANING OF THE pH AND REDOX ELECTRODES (mV)
1) Inorganic depostis and incrustations:
Immerse the electrodes in a 3% hydrochloric acid for a period of 5 minutes to dissolve the
deposits and incrustations.
2) Organic oil and grease film:
Use a solution of water and detergent to wash the end of the electrode. If this does not help, the
porous ceramic diaphragm is probably clogged. Immerse the end of the electrode in a HCl
solution at a temperature of 60, 70°C and leave it submerged for approximately 10 minutes. Let
the electrode slowly cool down, before you check, whether it is in good working order again. If
the sensitivity of the electrode has not improved after this treatment, it needs to be replaced.
STORAGE OF THE pH AND REDOX ELECTODES
For a correct responsiveness, the electrodes must always be immersed. The vial with the
protective liquid where the electrodes are immersed is a perfect protection during extended
periods of storage. Therefore, do not remove this vial, unless you use the electrode. If the vial
with the protective liquid gets lost, you can also immerse the sensor in a pH 4 buffered solution
with an addition of 1/100 saturated KCl. You can also use tap water for shorter storage periods.
Do not use distilled water. To avoid damage to the electrode, it must not be connected to the BNC
connector of the tank alarm sensor.
The pH and Redox electrodes are not covered by a guarantee.
WARNING
Disconnect the power supply before you access the terminal box. The original value must be
observed for the replacement of the fuse. Start with the connection to earth. We recommend that
you install a differential circuit breaker, sensitivity 300 mA, for additonal protection against electric
discharge.
ATTENTION
Prior to installation, check whether the supply voltage is compatible with the voltage of the station. The
technical drawings and data are subject to change at any time without prior notice.
TROUBLESHOOTING GUIDE:
If ... the pump is not dosing and the screen is turned off:
- Make sure that the pump is under tension.
- Make sure that the tension is compatible with that of the pump.
- Check, whether the fuse is in good working order.
- Replace the control card.
If ... the pump is not dosing and "LowLev" is displayed on the screen:
- Make sure that the pump contains a dosing product.
- Check, whether the floater of the level regulator is blocked.
- Remove the incrustation which might clog the floater in the low position.
If ... the pump is not dosing and the electro magnet develops pulses:
- Make sure that the filter is not blocked by dirt particles or cristallized matter.
- The pump body contains air. Restart the pump.
- Check, whether the suction and injection devices are cristallized or clogged.
- Make sure that there is no O-ring deformation caused by a chemical product which is
not compatible with the O-ring material.
The dosing station is equipped with a 630 mA fuse to protect it against overloads. Shut off the
power supply and remove the four screws of the front plate, before you replace the fuse.
S.A. au capital de 6 000 000 € - R.C.S/Rennes B 333263846000 37
MAINTENANCE
TROUBLESHOOTING
2002/09 - Indice de révision : A - code : 0029511
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