ADA INSTRUMENTS Cosmo 100 Operating Manual page 8

 COSMO 100
Reference Setting
Default reference setting is from the rear of the device.
Press the button (8) to set the reference: the front or the rear.
When the end-piece is folded out fully, the reference rear is set.
You will see the reference symbol on the display.
Selecting Units
Press and hold the button (7) for 2 sec. until the desired unit is displayed.
Clear-Key
Cancel the last action. Press button (5).