Hanna Instruments HI 3221 Instruction Manual page 38

The meter informations are displayed:
-firmware version
-language version
-mV and temperature factory calibration time/date
RANGE SPECIFIC PARAMETERS SCREENS
Calibration Timeout
Focus on the Calibration Timeout item.
Press Modify.
Use ARROW keys to set desired value.
Press Accept to confirm or ESC to return without saving.
Note: If enabled "CAL DUE" warning will be displayed, the set number of
days after calibration is over passed.
First point mode
Focus on the First Point item.
Press the displayed function key in order to change the option.
First point mode refers to the behaviour of the instrument regarding "One
point calibration".
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