Step 1: Understanding Diode
Fig. 1: Image of a Diode
Diode has two terminals Anode (+) and Cathode (-). Terminals can be identified by the shaded portion at the end of the diode. Terminal near the shaded portion is Cathode (-) and other one is anode (+).
Diode can be tested with the help of Diode function of the multimeter
Fig. 2: Image showing DMM connection on Multimeter
{C}{C}{C} ·Power ON the multimeter
{C}{C}{C} ·Turn the knob towards the “Diode Function”
{C}{C}{C} ·The Digital Meter will show no reading as there are no terminals connected.
Step 3:Testing Leads Connection
Fig. 3: Image showing crocodile probes connected to Diode
{C}{C}{C} ·Connect the leads in forward biasing i.e. Positive to the Anode and Negative to the Cathode.
{C}{C}{C} ·Connections should be tight and neat
{C}{C}{C} ·After connecting note down the reading.
Fig. 4: Image showing multimeter displaying Forward Voltage Drop of the Diode
The multimeter will show theforward voltage drop between the two testing leads.
Filed Under: Tutorials