Introduction to the voltage Gear of the multimeter:
When testing or manufacturing, it can be used to measure the voltage of each pin of the device and compare it with the normal voltage to determine whether it is damaged. It can also be used to detect the voltage regulator value of the Zener diode with a small voltage regulator value. The principle is as follows: R is 1K, and the voltage of the power supply terminal depends on the nominal voltage regulator value of the Zener tube, which is generally larger than the nominal voltage. Above 3V, but not more than 15V. Then use a multimeter to detect the voltage value at both ends of the D tube, this value is the actual voltage regulation value of the D tube
