Lumina 40 System64. SystemAccess the system menu by pressing the UP and DOWN navigation keys simultaneously for a few seconds.SYSTEM4.1 SystemSYSTEM SYSTEM tab page CommonClock type Setting of the 12 or 24 hour time indication.Time and Date Setting of the current time and dateComputer name Setting of the name of the control computer.Computer number Setting of the sequence number of the control computer in the network.Language Setting of the program language.SYSTEM SYSTEM tab page UnitsUnit of measurement Setting to simultaneously set all units to METRIC or NON-METRIC.