However, if it's only live readings, it's not so useful unless you have someone else watching or record on ya phone.
It doesn't matter, in that case. Just measure the wirespeed - pull trigger for 10 seconds and measure the length, make sure the return lead is safely out of the way.The reason I asked I have an old Tekker welder I replaced the wire motor speed control with a cheap Chinese controller and I don't know if the out put is the same as the original controller range.
30mm wire drive wheel at 140 revs on the top speed gives me roughly13 metres per min. 14.4 yds 43 ft 129 inches