Besides testing capacitors, inductors and resistors individually, the passive components test devices are also able to measure assorted electronic components which are composed of them. The former includes wound components, communication and power filters; the latter includes switches, connectors, lead wires, conductive, dielectric material, magnetic material and semiconductor components. The tests not only analyze the features of these components but also optimize the entire application process such as the inspection of auto manufacturing and incoming/outgoing material, quality verification and RD analysis to meet the low cost/high efficiency requirements.