Hanna Instruments HI 3221 Instruction Manual page 35

Language
Focus on the Language item.
Use the desired function key to change the option. Wait until new language
is loaded. If language load fails the instrument will try to reload current
language.
If any language can't be loaded, the instrument will work in safe mode. In
this mode all messages are displayed in English and Help is not available.
Temperature unit
Focus on the Temperature unit item.
Press the displayed function key in order to change the temperature unit.
Beep On
Focus on Beep On item.
Press the displayed function key to enable/disable beep.
When enabled, beep sounds as a short beep every time a key is pressed or
when the calibration can be confirmed.
A long beep alert that the pressed key is not active or a wrong condition is
detected while in calibration.
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