to reach the desired time for the mode the select button 60 is used to select the pressure or light mode for input of time led buttons 48 located above the stop and start buttons indicate when a cycle is running start led is lit and when a cycle is over stop led is lit a curing operation using the pressure and light mode proceeds as follows press start key 46 to start the cycle the pressure latches 35 will close and seal the chamber the start led will light to indicate the cycle is in progress the unit will first pressurize the chamber to up to about 85 psi pressure is set by an external regulator the time display will begin to count down in seconds after the pressure segment the light will be activated the pressure led will go out and the light led will go on indicating that the time display is now counting down for the time that the light is on pressure will be maintained the time display will continue to decrease until the time reaches 0 00 the pressure will then be released when the pressure reaches nominal pressure the stop led will come on and the start led will go out pressure latches 35 will then retreat to add a purge segment to the cycle the purge key or button is pressed when setting up the mode to begin the cycle.