Gotcha. Okay it makes sense now.
So Congress told the voters of the states to elect ratifying conventions. The model followed by most states was to elect one delegate from each district of the lower house of that state's legislature. Delegates would run pledged to vote to ratify or not ratify. When the ratifying convention met, there was a brief debate and then an up-or-down vote to ratify. Once the vote was tabulated, the delegates went home.