Proof of diode is different from the test of resistance because you need a capacity to do so. If you do not know whether or not to test a diode can not be repaired equipment. A bad diode looks good. This will certainly lose precious time. A diode rectifier may fail in one of four ways. It May:-Open-
card
leak
-Ventilation, when all the tension of a multimeter analog or digital multimeter can be used to check if all the first three conditions, except the last, where diode breakdown in full stretch. From my point of experience in electronics repair the line, I found that control of diode use analog multimeter is more precise than using a digital multimeter. I can explain why I preferred analog meters. I do not know about you, because actually met a good number of diodes which is confirmed by a digital multimeter ok, but not when tested with analog meters. The first step in the right way to test a diode is to eliminate one of the diode lead. You can not always be sure whether a diode is good or bad thing if it is done in a test circuit, because behind circuits by other components. To be sure, will be lifted, or log drive a diode circuit to avoid circuits. Unless you are sure that the board see. Sometimes I feel unwell diode in the realization that the board of directors. His experience will tell you when to check a diode on board or outboard. If you are new to the repair of electronics, I recommend you check a diode to drive withdrawn from the council. I will establish my analog X1 ohm meter to check if there is leakage current diode reverse and forward evidence. Connect the black probe of the meter to the cathode and the probe red at the anode, the diode is reverse biased and should be something like a reading open. Connect the red probe of the meter to the cathode and black probe to the anode, the diode is biased forward and the value-cons should read some resistance. If you have two readings then most probably the diode is a short circuit or leak and must be replaced. If you do not get a player, either forward or backward prejudices, the diode is considered open. The real problem in the verification of a diode using the test of a digital meter diode is open or leaking diode, against one said ok (0.6). This is due to digital output diodes (which can measure the production of test tube with another subway) is about 500mV to 2v. A set of analog meters have X1 ohms output 3V (remember the two batteries that only 1.5 V installed in the subway). The voltage of 3V is sufficient to show that reading requires a diode when you are tested. Even if you have a good reading of what ohms X1 does not mean that the diode is good. It is now your feet for x10K to test the new diode. The output voltage of x10k ohms is being 12V (remember 9V batteries in your meter 1.5 V +1.5 vv +9 = 12v). Again, the diode during the test must show a single reading. It is an exception for the Schottky diode, in which they have two readings, but not short-circuit reading. If the meter showed a reading and then diode under test is good. If you have two readings then most probably the diode is a short-circuit or leaks. The digital underground is not because the subway exit is only 500mV to 2v. If a diode at a full breakdown of tension, there is no way to test diode (unless you have a very expensive than tests diode specially designed to find such problems). Substitution to a well-known diode is often the only way to prove that a recurring diode which is behind a particular problem. Sometimes a recurring diode can find using a spray cooling water. Caution: Make sure the power gets out of circuit before proceeding with any of these controls diode, the subway or another circuit can cause damage. Conclusion of the diode test works properly, you must X1 analog meters and x10K ohm-ohm range. Jestine Yong is an electronics repair shop and a writer. For more information on the repair of electronics, you can visit their website on http://www.noahtec.com/electronic-repair-articles.htm http://www.noahtec.com/electronic- - Repair articles. htm
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