Re: Old dog learns new trick...Welding!
That interesting that you figured that. I did see on the flow guage it also says for Argon 0.032 so I guess for a different tip or the density of a different gas type would alter the calibration for the flow.
I suspect you get a handle on these things and also not to forget that I found the Hobart site has threads also and you can search there. On the phone they were very helpful and did not ask for cc info to just answer information on getting parts and initial use of the purchase product. Sort of unique in these times I'd say.