Lil'Wayne

Is something wrong with my digital scale?

When I calibrate it with a 200 gram weight, it gives me .02 less on the check weight the first time around.

When I zero an object, then remove it, the value shifts by as much as .2 *grains*. Putting the same object back on the scale ALWAYS gives me 0.

According to the onboard level, the scale is perfectly fine on the solid surface. It has a box, so air currents are not a problem. The closest electrical object is through a wall about 6 feet away– and it’s a fridge. (Computer is about 12 feet, through a wall/door combo.) It is brand new, as is the check weight.