We are using TIMY as a stand alone timer (i.e., not connected to any software)running Stopwatch. Is there an easy way to cancel a false finish,false start or to DNF a racer?

You use the CLR button in conjunction with the Green and Red OK buttons.

DNS

Just type in the next number to start and ignore the DNS

False Start

Retype number of racer who false started followed by Green OK button.

Press CLR followed by Green OK button

DNF

Just move on to the next racer and ignore the DNF is the easiest way to deal with that.

False finish

Press CLR followed by the Red OK key to put the last finisher back on course.