Dunno - but I've just tried a wee experiment with my
innokin Coolfire Z80 - it records 1 puff if I draw for 1 second and one if I draw for 5 seconds - so it's hardly that scientific!
I've never bothered with looking at the puff counter - imho it's just a piece of fluff that I can manage well without.
Being honest, if i could be bothered to read the instructions I'd turn it off altogether, but as someone once said to me -"You're a nice guy Gerry, but for God's sake RTFM!"