Hanna Instruments HI 84429 - Manual (Page 17)

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Press Select to view the firmware version, language
version, mV factory calibration date and time and
temperature factory calibration date and time.
Press ESC to return to the Setup mode.
Meter information
Press the function key to select the new option.
When enabled, a short beep is heard every time a
key is pressed or when the calibration can be
confirmed.
A long beep alert sounds when the pressed key is
not active or a wrong condition is detected while in
calibration.
Beep On