15/09/2014
Testing Electrical and Electronics Components and Devices with Multimeter
We all know the rule andimportanceof “Troubleshooting” in Electrical and Electronics Engineering. Most EE Components and Elements used in Electrical and ElectronicsEquipments, andDevices are common in their functions and operations. To be a good analyzer and troubleshooter, you must know the following basic techniques in Electrical and Electronics Troubleshooting. In this basic tutorial, we will use AVO Meter (Ampere-Voltage-Resistance Meter) or MultiMater (Digital/Analog) to test the continuity or resistance of the following components.
*.Cable and Wires
*.Switch/Push Buttons
*.Fuse
*.Capacitors
*.Resistors
In troubleshooting, we use different kinds of basic Electrical and Electronics Engineering Toolsbut the main and important tool is Multimeter. Now we will check the above mentioned components and devices with this tool one by one.
Cable and Wires
To check if the cable and wires are in good condition or broken, we perform the continuity test. For this purpose, take AVO meter (or Digital Multimeter) and select “Resistance” (in AVO meter…Rotate the k**b to the “Ω” or Resistance). Now connect both terminals, i.e. both naked ends of the cable/wire with the AVO or Digital Multimeter Terminals. If the meter reading shown “0 Ω”, it means Cable/Wire is in “Good Condition”. On the other hand, if meter reading is “Infinite”, it shows the cable/wire may be defected or broken. So you need to replace it with a new one.
Switch/Push Buttons
Use the same method (mentioned above for checking the cable and wires)…to perform this method correctly, you will need to apply this method in both cases (ON & OFF positions) on switches and push buttons…In other words, first apply this method on switches/push buttons and then “Push” the push button and perform the same method again. At first attempt, if meter reading is “Zero” and in the second attempt, the meter reading is infinite, it means Switch/Push button is in good condition