أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
I agree with the answers in here.
any how many manufacturing have specified the interval period for their product. On other hand many owner they just applay to what Mr.Hassan Idami says
It depends on client. For some clients , calibration validity is six months. For others it is one year validity.
Calibration frequency depends on a number of factors including: