Multifunctional universal meter capable of measuring direct current resistance under condition of port voltage

A multifunctional multimeter capable of measuring direct current resistance under the condition of port voltage comprises a digital multimeter body, a measured resistor RX and a reference resistor R0 are connected in series and then are connected between a V + interface and a COM interface of the digital multimeter body, the V + interface is communicated with a VREF + interface, a VREF-interface is communicated with an IN + interface, the IN-interface is communicated with the COM interface, and the measured resistor RX and the reference resistor R0 are connected in series and then are connected between the V + interface and the COM interface. And a fixed-value resistor R1 connected in parallel with the measured resistor RX is additionally arranged. The utility model provides a multifunctional universal meter capable of measuring DC resistance under the condition of port voltage, and the multifunctional universal meter can accurately measure CT secondary DC resistance in any magnetic field environment. In fiel