Hanna Instruments HI 3221 Instruction Manual page 41

Use ARROW keys to focus on the parameter to be changed ("Change Slope"
or "Molar Weight").
Focus on Change Slope item.
Use ARROW keys in order to select the desired combination.
If None/-59.16 is selected the slope of the probe can be changed by pressing
Modify key.
Press Modify.
Use ARROW keys to change the slope.
Press Accept to confirm or ESC to exit.
Focus on Molar Weight .
Press Modify in order to change molar weight.
Use ARROW keys to change the value. Press Accept to confirm or ESC to exit.
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