BENIFERRO ZPTX0010-P, Руководство пользователя

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2. Press the pH and Redox buttons (upper and lower button) for 10 seconds.
Once the calibration starts a screen is activated and shows what YOU are calibrating, you can
calibrate pH separately or calibrate Rx.
A timer will stop after 120 seconds and give a message whether the calibration was
successful.
In case of an unsuccessful
calibration there is the following
message