In this work are considered the features of measuring devices like multimeters on the base of the digital signal processing, their structure is analyzed. The basic differences of measuring are indicated through the digital signal processing from the ordinary measuring through digital measuring devices. Formulas by which the signal processing is carried out are also resulted, in particular, formulas for the calculation of mean square value of voltage, harmonic content, power. Possible approach is considered to the evaluation of uncertainty of measurement with the help of a multimeter.
multimeter, digital signal processing, microprocessor