Metrological characteristics of MN-3 solid-body DC voltage measures

Results of theoretical and experimental investigations into the statistical characteristics of the voltage instability of type MN-3 measures are prese nted. The capabilities of linear mathematical models of the voltage instabi lity of solid-body measures are considered and evaluated. It is shown that MN-3 type measures maintain a relative measurement (comparison) error in th e range 1.10(-8)-3.10(-8) only for a measurement period Deltat less than or equal to 1 h and that with Deltat approximate to 1 day, the error increase s to values in the range 5.10(-8)-8.10(-8), while when Deltat approximate t o 1-3 months it increases to 5.10(-7).