. OPERATION DETAILED CONTROLS AND GAUGES display. 3 - 40 Service Meter/Clock Display Selector Switc On the standard screen, it is possible to press switch F4 to switch the met cloc display of the onitor When the time is being displayed, press switch F4 to switch to t he servic e meter display. being displayed, press switch F4 to When switch the to t service he time meter is display.