... PSI, Bar, Kgf/cm or Kpa Display, the unit is in the system for measuring tyre pressure. 3. Press"UNITS"button to choose ... : PSI, Bar, Kgf/cm² Or Kpa. 4. Place the chuck of the gauge onto the tyre valve, Pressing firmly to insure a good seal ... to Relief until you get the right pessure. *In the situation for measuring tyre tread depth: 1. Press the "MOLD" button. When "mm"or ...