Put the personal bag down before you start scanning items so the scale doesn't get surprised when you put your bag down without having scanned anything. If it g

Put the personal bag down before you start scanning items so the scale doesn't get surprised when you put your bag down without having scanned anything. If it gets fussy at you when scanning (unexpected item), pick up a side of the bag an inch or two or wiggle it a bit to get the scale to be happy again to continue your checkout.