Initial value problem of zero

Cordial greetings.

  I have a problem with EW 2200-2NM scale, which appears when you turn and then appears Adj -60.25 g. When adjusting the zero and span she performs the procedure correctly being observed normal behavior. To put it back again the error of zero, ie, -60.25 g. I can help with this problem. My email is tecnelco@hotmail.com