–Application of AC low-voltage technology is
introduced in this paper, and the essentiality of AC low voltage’s
verification is indicated. Respective discussed some methods
applied in AC low voltage meter verification, include method of
resistance divider, method of inductive divider, method of
AC-DC transfer and method of standard source. Principle and
actuality development of those four methods be expatiated. At
the last the characteristic and specification of an AC low voltage
standard source is introduced, this instrument manufactured by
our Institute, which consist of 10V voltage reference, 7-bit
programmable decimal divider, sine wave generator and low
noise programmable divider, voltage reference be used to
change amplitude of standard output, sine wave generator be
used to output AC voltage signal, low noise divider be used to
generate AC low voltage, uncertainty is 120×10-6 mV at 10 mV 1
kHz.