Humboldt H-4114SD.3F Electrical Density Gauge - Manual (Page 13)

If you already have Proctor data for the material you are going to be
testing, enter the Maximum Dry Density and the Optimum Moisture in
the appropriate fields. Simply press the appropriate field and a keyboard
will appear for you to enter data into the field. The screen shots below
show adding a value to the Max Dry Density field.
Once you've entered data, press the Select button and your info
will be saved to the field.
Now you can add a value to the Optimum Moisture field.
Once you've entered data, press the Select button and your info
will be saved to the field.
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