Idegis DOM-12 PH, Operation Manual

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ELECTRODES
The DOMOTIC Series system has a light indicating malfunction of the electrolysis cell electrodes [13]. This usually occurs at the
end of the electrodes ’useful life, when they lose their power. However, although this is a self-cleaning system, this malfunction
could also be due to excessive scaling on the electrodes when the system operates with hard water with a high pH value.
Fig. 31
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PH / ORP OUT OF RANGE (only in models DOM-XX PH and DOM-XX PLUS)
The integrated pH/ORP control system has two ALARM lights which come on whenever a pH value of less than 6.5 “LOW” [19] or
more than 8.5 “HIGH” [16] is detected, or ORP falls outside the 600 mV “LOW” [25] - 850 mV “HIGH” [22] range. When the
regulator detects an active pH alarm, it opens the control output of the dosage pump (pH).