I do my set up when i first get to the home.
I hook up a hose to the tank “T” spigot and run the hose as far from the house, septic, well as possible.
Then I flush out the line for a few minutes while I check the cut in/out pressure for the switch.
I then hook up the Toro to the hose end and adjust the flowrate on the Toro until it hits that midpoint pressure (i.e. 40 @ 30/50) and record it then let it run.
I start my normal inspection and check back at the tank every once and awhile.
I then document the flowrate at the end of the HI (usually 3-4H) and report as “8gpm @ 40psi for 180min”.
By the way, be very careful with the Toro, they can stop working all of a sudden so I always bring my “measured” bucket and stop watch with me.
When it stops showing flowrate, I take it all apart, clean etc.