In the traceability transfer process from the national standards of the Ist
ituto Elettrotecnico Nazionale "Galileo Ferraris" (IEN) to standards of cal
ibration laboratories accredited by Servizio di Taratura in Italia (SIT), t
he use of high-precision multifunction instruments, in particular digital m
ultimeters (DMMs), as reference standards turned out to be a good transfer
method. In fact, their use provides swift and less expensive transfer at an
uncertainty level comparable to that one obtained using high-precision ind
ividual standards, such as 10 V de voltage standards, standard resistors, o
r ac/dc transfer standards.
In this paper, it is described how this transfer process is performed and w
hat results are obtained.