Hanna Instruments HI 221 - Manual (Page 24)

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CURRENT YEAR SET
Press the CAL key when the current year is displayed. The year will begin
blinking.
Press the ARROWkeys to change the year.
Press the CFM key to save the modified value or press the CAL key to cancel
without saving the year.
pH RESOLUTION SET (HI 223 ONLY)
Press the CAL key when the pH resolution is displayed. The pH resolution
(0.001 or 0.01) will begin blinking.
Press the ARROWkeys to change the pH resolution.
Press the CFM key to save the modified pH resolution or press the CAL key to
escape without saving the pH resolution.
BEEP STATUS SET
Press the CAL key when the beep status is displayed. The beep status (On or
OFF) will begin to blink.
Press the ARROWkeys to change the beep status (On or OFF).
Press the CFM key to save the modified beep status or press the CAL key to
cancel without saving the beep status.
Note: If enabled, an audible signal will follow each key press. Inactive keys
have a longer beep. A longer beep is also sounded when the limits of
the range of a parameter are reached.
An audible signal will also sound when the reading becomes stable
during calibration.