Differentiation between Zener Diode and Ordinary Rectifier Diodes

Differentiation between Zener Diode and Ordinary Rectifier Diodes

First, use a multimeter R × 1K gear, press to determine the positive and negative electrodes of the tested tube. Then set the multimeter to R × On the 10K gear, connect the black lead to the negative pole of the test tube and the red lead to the positive pole of the test tube. If the measured reverse resistance value at this time is higher than using R × The reverse resistance measured in 1K gear is much smaller, indicating that the measured tube is a voltage regulator tube; On the contrary, if the measured reverse resistance value is still large, it indicates that the transistor is a rectifier diode or a detector diode. The principle of this recognition method is that the multimeter R × The battery voltage used inside the 1K gear is 1.5V, and generally does not reverse breakdown the measured tube, resulting in a relatively high resistance value. And R × When measuring at 10K gear, the voltage of the internal battery of the multimeter is generally above 9V. When the measured tube is a voltage stabilizing tube and the voltage stabilizing value is lower than the battery voltage value, it is reverse breakdown, greatly reducing the measured resistance value. But if the tested tube is a general rectifier or detector diode, then regardless of the use of R × 1K gear measurement or R gear measurement × When measured at 10K gear, the resistance values obtained will not differ significantly. Note that when the voltage stabilization value of the tested Zener Diode is higher than the multimeter R × When the voltage value is at 10K gear, it is impossible to distinguish and distinguish using this method.