Press “CAL” key for a few seconds, until the green display blinks and indicates “470”.
Shake the electrode 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” key. If the process has concluded satisfactorily, a long “beep”
will be listened and the controller will be calibrated and ready to operate.
NOTES ON CALIBRATION
:
If the calibration process is interrupted for whatever reason, the ORP
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
green display will appear.
If the ORP value detected during the calibration process is very different
from the expected one (e.g., defective electrode, etc.), green display will
indicate “E2”, not allowing calibration.
If the ORP measure is unstable during the calibration process, code “E3”
will appear. In addition, the pH-electrode calibration will not be allowed.
6.6 MAINTENANCE OF THE pH/ORP ELECTRODES
Ensure that the electrode membrane remains moist at all times.
If the electrode is not going to be used for a long period, keep it submerged in a
conservation solution at pH=4.0
To clean the electrode of possible dirt, avoid the use of abrasive materials that can scratch
the sensor surface. Use an acid based probe-cleaning solution to clean the electrode.
The pH electrode is a consumable part and will need to be replaced over a period of time.
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