What is the basic working principle of a digital multimeter?
A: The basic circuit of a digital multimeter is a meter circuit, and its basic function is to quantify the input DC voltage (analog quantity) and output it; other functions generally require the addition of external circuits. PS: Now the multimeter chip has higher and higher integration, and less and less peripheral circuits, which has advantages and disadvantages. Advantages: high integration, simple external circuits, and fewer quality failures caused by component quality problems; disadvantages: once the chip is broken, the replacement cost is high and troublesome. Generally broken and had to be scrapped.
