Thermo Scientific APEX 100 User Manual page 23

5) Use the navigation buttons to select the metric/imperial function.
Metric/Imperial Units
6) Press the Go button to toggle between imperial and metric units. Highlight the units
of measure (meters, or feet and inches) you prefer to use.
7) To exit (and select the units you chose in Step 6), press the Back button repeatedly
until you get back to the Main Menu.
Thermo Scientific APEX User's Guide Page 23