If it is used in electronic circuits, in addition to meeting the previous conditions, there should also be a three-level tube measurement gear and a temperature measurement gear. Especially the capacitance measurement gear should meet the needs of measurement. Many capacitors on the circuit board have a capacity of 1 picosecond, so the capacitance measurement range of a multimeter must be able to measure small capacity components on electronic circuits. Some multimeters measure capacitance by inserting the pin of the capacitor into the capacitance measurement port on the meter. Some multimeters do not need to be inserted into the meter for measurement, as long as the gear is set to the capacitance measurement gear, the capacitance can be directly measured with two probes.