5 Clicks on power button keep clicking to mode set "Mode" press up or down till "Joule". "Set Temp" (gonna have to play with this to you find how warm u like it), make sure "Coil select" is on ni200. Lock the coil resistance before you start using the device/coil for the 1st time up+down buttons "Lock Resistance". .5 @40w's is maybe in the 50j 450-520temp range. Just think of joules as the gas/ramp time and the temp as the speed limit/warmth.