{"id":4662,"date":"2020-07-01T09:44:59","date_gmt":"2020-07-01T07:44:59","guid":{"rendered":"https:\/\/dcaclab.com\/blog\/?p=4662"},"modified":"2022-11-21T19:35:54","modified_gmt":"2022-11-21T17:35:54","slug":"how-to-test-rectifier-diode","status":"publish","type":"post","link":"https:\/\/dcaclab.com\/blog\/how-to-test-rectifier-diode\/","title":{"rendered":"How To Test Rectifier Diode"},"content":{"rendered":"

Diodes are one of the commonly used components in electronic devices. Thus, for ensuring that the diode is apt for the particular (as per requirement) use, to test a diode is important. We can test ordinary diodes and Zener diodes using the digital or analog multimeter.<\/span><\/p>\n

As diodes are used in circuits for protection, rectifications, etc thus it is the one which gets damaged first in case of any fault in the system. Few example circuits can be a full-wave rectifier<\/a>, half-wave rectifier<\/a>, LED driver circuit<\/a>. This reason gives even stronger reason to check a diode always before its use. Also, we have two modes of diode namely, forward conducting mode and reverse blocking mode. Thus both of these need to be tested separately.<\/span><\/p>\n

How to test a diode<\/span><\/h2>\n

It can be tested using a multimeter. In a practical diode, we have resistance in both forward and reverse directions. It is always better to check a circuit before assembling it. But if we don\u2019t do so and results are also not as per our expectations then we may get confused that whether there is an issue in the circuit or the components (diode, other electronic devices) are not performing desirably.<\/span><\/p>\n

A diode is best tested when it is forward biased. The voltage drop due to its forward resistance <\/span>is calculated. In forward-biased condition, the diode acts as a switch (if resistance is ignored). Let us now learn how to test the diodes.<\/span><\/p>\n

\"Diode

Testing of Diodes<\/p><\/div>\n

With Digital Meters<\/span><\/h2>\n

Nowadays most digital multimeters are provided with special \u2018diode test\u2019 range. It is done to ensure perfect measurement as other voltages may not overcome the diodes forward junction potential (and thus no conduction in the forward direction).\u00a0<\/span><\/p>\n

But one question that arises here is that what if we don\u2019t have a diode test range in a digital multimeter!<\/span><\/p>\n

Well, we have another method that can help test the health of the diode. We could set the multimeter to the resistance mode (ohmmeter method) and then proceed.\u00a0<\/span><\/p>\n

Let us understand the procedure of conducting the health check-up test for diodes by both the ways.<\/span><\/p>\n

With Diode Test Range in Multimeter\u00a0<\/span><\/h3>\n

The following procedure is used to test the diode:<\/span><\/p>\n