Digital multimeters are electronic test instruments with versatile usage, forms and types which may be more than other kinds of instruments.

Times changing make many systems also have big changes accordingly, while it needs more and more advanced techniques to support.

A digital multimeter (DMM) is an electronic instrument used for electrical measurement. It can have many special functions like math function and temperature, but the main function is to measure electrical parameters such as voltage, current, resistance and continuity.

ㆍFor the quick check and analysis of Spectral Characteristic ㆍEMC pretest ㆍAnalysis and test of characteristics various signals ㆍTest systems that requires a very compact instrument ㆍMeasure the frequency response of cable, attenuator, filter and amplifier

Crest factor (CF) is defined as the ratio of the peak amplitude of a waveform to its RMS value.

The definition of power quality - is the deviation of voltage, current, or frequency that lead to electric equipment’s breakdown or abnormal work.