Dip your stick into the thinned paint. when the fluid remaining on the stick breaks up into individual drops, the first few drops should be about 1 second apart. I just thin things approximate then adjust my gun accordingly. Remaining paint goes back into the pot, then repeat the thinning process. This is why I never bother to measure..Thanks for the advice. When you say until the drops are one second apart, do you mean after the initial stream drips from the stick?
measuring with a viscosity cup is similar, dip the cup and measure the time it takes until it forms individual drops but holy heck would I get yelled at if I was sitting there on site with a stop watch 😆.