The ST2828 series is an impedance test instrument with an advanced technique of a auto balancing bridge. It fulfills all the measurement needs for components and materials with its high basic accuracy of 0.05%, wide frequency range from 20Hz to 1MHz and an impedance range up to 100MΩ. The instrument is especially suitable for low dissipation factor (D) capacitor test and high quality factor (Q) inductor measurement. The high power measurement conditions of up to 20V test signal level and 40A DC bias current and list sweep function makes it easy to extend the user's capability of component evaluations. The 4-terminal pair configuration eliminates the electromagnetic coupling of test leads and extends the low impedance measurement range ten times down of the normal 5-terminal configuration instrument.