frequency function will do nothing for you. I will do my best to remember to get the number off of mine tonight and post it.
You need to look at the list of functions. It will be clearly labeled "Duty Cycle" or " % "
PS, I haven't seen a Simpson 260 in a very long time. It seemed like every one I ever had my hands on, had a broken case. My Dad had an optional case that had a rolltop door on the front. His was always in good shape. LB