24
Fig. 35
ERROR MESSAGES:
If the calibration process is interrupted for whatever reason, the pH-controller will automatically leave the
calibration mode if the intervention of the user is not detected in a few seconds. In this case, “E1” indication in the
display [15] will appear.
If the pH value during the calibration process is very different from the expected one, (e.g., defective sensor, etc.),
display [15] will indicate “E2”, not allowing calibration.
If the pH measure is unstable during the calibration process, code “E3” will appear in display [15]. In addition, the
pH-sensor calibration will not be allowed.
6.3. Calibration of the ORP sensor (only in DOM-XX PLUS models)
The calibration frequency of the controller will be determined in each particular application. Nevertheless, we recommend to make it at least,
once a month during the use period of the pool. The ORP controller has an automatic calibration system for the ORP sensors based on the
utilisation of a 470 mV reference solution.
PROCEDURE:
IMPORTANT: before closing the by-pass valves, stop system from control panel (see Section 5.1).
1. Extract the ORP sensor from the holder and wash it with tap water.
Fig. 36
2. Press “CAL” [23] key for a few seconds, until the ORP display [24] blinks and indicates “470”.
3. Shake the sensor smoothly so that any water drops that may be adhered to the plastic body are removed and introduce it to the
calibration solution (470 mV). Shake smoothly for a few seconds and press “CAL” [23] key. If the process has concluded
satisfactorily, a long “beep” will be listened and the controller will be calibrated and ready to operate.
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