In this Video, we will discuss that How to check the diode by using Digital Multimeter. We will check that How to identify the anode and cathode of the diode with a Multimeter and by physical condition. Further it we will also check that either the diode is normal or faulty and what is the faulty condition in the diode. Detailed Lab video and Diode testing methods is given below.
How to Identify Anode and Cathode of Diode:
Every diode has two terminals Anode (+) and Cathode (-). These terminals can be identifying by the shaded side at the end of the diode. The shaded side terminal of the diode is Cathode or negative terminal of the diode while the other terminal of the diode is Anode or positive side of diode as shown in the below image.
Testing a Diode Using Multimeter:
- Turn the rotary switch of the multimeter to diode test mode and adjust the probes as black probe in COM socket and Red probe in diode symbol socket.
- Connect the multimeter probes to the diode terminals and record the value.
- Now reverse the multimeter probes to the diode terminals and record the value again.
- A good diode will show the value of 0.570 to 0.900 in forward biased condition and 0.00 in reverse biased condition as shown in the below image.
Faulty Conditions of Diode:
- If the diode shows the value on both forward & reverse sides, the diode is faulty and the fault is “Diode is short”.
- If the diode not shows the value either forward or reverse biased, the diode is faulty and the fault is “Diode is open”.
You can also watch the video tutorial to practically learn more about these this practical explained in the video tutorial below.