To discover why Fluke is better will take 10 to 20 years
Fluke will still be on originals specs
I doubt Brymen will ( just in case the meter still works )
It's not fair to compare the two
Frankly, after such a long time I would try to callibrate it, no matter what brand it is. Is there some sort of science that supports the supposed superiority of Fluke in terms of long-time stability? I don't mind firm beliefs as I consider myself Catholic, but while God is omnipotent, the manufacturer of may not be
In this case I would prefer to rely on scientific arguments.
And is it 10-20 years of bench use or 10-20 years of abuse in industry envoronment everyone here suppoertink Fluke is so passionate about. For example mine will be used only on a desk.
Also if it takes 10-20 years to notice some sort of drift from callibration, I would assume that after such a long time one will have a new DMM anyway.
Assuming that recallibration will cost say 20-30% of the Brymen cost, it would take 50-100 years to make up for the price difference