A New Multifunctional Digital Instrumentation

A new multifunctional digital instrumentation is presented in this paper, which consists of multiplex, analog-to-digital converter (CAD), frequency-to-digital converter (FDC), single-chip-microcomputer, keyboard, digital display and printer. It can measure seven analog signals and two frequency signals. The analog signals are the output signals of analog transducers. The frequency signals may be the output signals of the transducers with frequency output. Besides, some main special functions of this digital instrument are: automatic compensation of temperature and source voltage fluctuation.