Explain 5 things that could cause an incorrect mass when using the triple bean balance?

Incorrect mass labeling, Not starting at 0 and gradually increasing weights. Possibly weighing the wrong object (?) Maybe you keep your hand or another object on the scale ... There are many things that can go wrong while usuing the triple beam scale ... Always make sure you take more then one measurement.

If the scale is not "zeroed". If you do not use grams (g) to lable your products. If you do not unlock the balance. [that's about all I got doll]