I'm not sure if you can on the XMT's, you will have to check the manual. If you go to Millers site and pull up the manual for the Dynasty, it will give you the start up sequence of buttons to push when you power up the unit to get to the arc start and hours display. I know you can do this for the Syncrowave 200's, Maxstar's and Dynasty's. I've checked hours on all 3, but I have to read the manual to remember the sequence of buttons to push.