Multimeters have an option to measure resistance indicated on their front panels. By switching the dial to the ohms setting and turning the power off to the appliances being measured, the status of a circuit can be determined.Know More
A multimeter tests resistance by sending a small electrical charge through the device and recording the current. If the power is on, it will disrupt the device and blow the fuse of the multimeter. Therefore, remove the battery or unplug the appliance from the wall.
The red lead goes to the port marked "VA" or something similar. The black lead goes to the port labeled "COM". Turn the measurement setting of the multimeter to resistance, which is indicated by the ohms symbol. Many digital multimeters will adjust range, but analog multimeters may have ohm, kiloohm, or even megaohm ranges.
Touch the red lead to the positive terminal, marked with a plus sign or the shorter outlet plug, and touch the black lead to the negative terminal or larger outlet plug. Although current can travel either way, it's best to get into the habit of learning which leads are which. Also, always grip the leads by the plastic or rubber housing, never by the metal tip.
A multimeter is able to let you know how much electricity is flowing through a wall outlet. Though it generally is not a good idea to insert objects into a wall outlet, a multimeter only works when you insert its probes into an outlet. There is a safe way to do this.Full Answer >
To test a capacitor set the multimeter to OHM and touch the leads of the multimeter to the terminals on the capacitor. The multimeter should read to infinity, indicating that the capacitor is in good condition. This method is meant to work with analogue multimeters.Full Answer >
Using a multimeter, insert one of the probes from the multimeter into one of the parallel slots in the 240-volt outlet and insert the other probe into the other parallel slot to test if the outlet is indeed carrying 240 volts. If the voltage does not add up to 240 volts, check the slots individually to see which one is carrying less voltage.Full Answer >
To test a household electrical circuit for short circuits or places where the circuit deviates from its path, use a multimeter. Set the multimeter to measure resistance, and test any electrical outlets that are suspected of having short circuits.Full Answer >