You can always move the payload away from the centrifuge, you don’t have to spin any slower or faster.
The maximum apparent gravity is still fixed, but it’s a direct consequence of the materials available so there’s some industry standard chart somewhere where you can put those 1900 g-ton and read how many gs you can get.
Is 1 ton it’s weight limit? Dunno.
Its weight limit is 19 MN. You can divide it in any reasonable product of payload mass and apparent gravity you want.
It would be way more practical to label it by the actual weight than that gravity*mass bullshit. But engineering has some boneheaded practices that people insist on keeping alive, mostly for gatekeeping.