How to use a multimeter to measure the positive and negative poles of a diode in detail
1. I can't see the specific model of your multimeter clearly;
2. A typical digital multimeter measures a voltage of less than 2V at the diode level, while you are measuring P6KE36, which is a bidirectional diode. This type of diode requires a voltage of at least 6V or above at the diode level in order to measure it. However, a typical digital multimeter cannot achieve this voltage at all at the diode level;
3. Simply put, it is only possible to measure this type of diode when the voltage between the two probes in the diode range exceeds 6V, and your multimeter cannot meet this requirement at all;
4. To measure this type of diode with your multimeter, you must use a regulated power supply with a voltage exceeding 10V, connect a resistor in series, and then connect it to the diode in series to measure whether it is good or bad;
5. As for the resistance value and power of the series connection, it depends on the normal working current of your diode. I cannot provide you with a specific calculation here.
6. Because the voltage on the diode range of your multimeter does not meet the requirements, both forward and reverse measurements do not work, but it cannot prove that the bidirectional diode is broken.
7. Simply put, this type of diode cannot be directly measured using the diode range of a multimeter.
What is the value measured by the diode block of a digital multimeter when measuring the rectifier diode
Using the diode range of a digital multimeter, insert the red lead into the V Ω hole and the black lead into the COM hole. We know that in a digital multimeter, the red lead contacts the positive pole of the internal battery, while the black lead contacts the negative pole of the internal battery. In a pointer multimeter, the resistance range is where the red lead contacts the negative pole of the internal battery, and the black lead contacts the positive pole of the internal battery. In a digital multimeter, the red lead contacts the positive pole of the diode, while the black lead contacts the negative pole of the diode, (Measure the forward resistance value) The normal value is 300-600 Ω. Then, contact the red lead with the negative electrode of the diode and the black lead with the positive electrode of the diode (measure the reverse resistance value). The normal value is "1". If both measurements show 001 or 000 and the buzzer sounds, it indicates that the diode has broken down. If both measurements show "1", it indicates that the diode is open. If the two measurements are similar, it indicates that the quality of the tube is poor, The reverse resistance value must be "1" or above, and the forward resistance value must be 300-600 Ω. Diodes are good.
