Balances's qualification

Dear all, regarding balances’s qualification , i want to proceed for internal qualification using standard weights. What the right method To Follow to détermine the MPE (acceptance creteria) should i take in count MPE of standard weights ???
Morover , shoud i calculate the k To Find the e because (e=k*d) or i consider just the value of e given by the To calculate the appropriate MPE???
I am lookin eagerly for your reply