Principle of measuring resistance with digital multimeter
The functions of measuring voltage, current and resistance are realized through the conversion circuit part, and the measurement of current and resistance is based on the measurement of voltage, that is to say, the digital multimeter is extended on the basis of the digital DC voltmeter. The converter converts the analog voltage that changes continuously with time into a digital quantity, and then counts the digital quantity by the electronic counter to obtain the measurement result, and then displays the measurement result by the decoding and display circuit.
The logic control circuit controls the coordination of the circuit, and completes the entire measurement process in sequence under the action of the clock. A digital multimeter (DMM) is an electronic instrument used in electrical measurements. It can have many special functions, but the main function is to measure voltage, resistance and current. Digital multimeter, as a modern multi-purpose electronic measuring instrument, is mainly used in physical, electrical, electronic and other measurement fields.
