No, don’t worry, your pH meter should still work. To fix it, leave your pH electrode in the pH 4 calibration solution for an hour and it should return to normal function. Enabling SO2 mode with the pH electrode attached could cause the pH electrode to wear out more quickly. Because of its design, SO2 mode cannot be accessed unless you press ‘enter’ after pressing the ‘mode’ button, this is another safeguard we installed to prevent this from becoming a problem.
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