Only a few decades ago, if you knew how to use a multimeter, you were probably an electronics technician or an engineer. But, today, the handy test tool known as a Digital Multimeter should be in the toolbox of every handyperson. The multimeter is great for determining the working status of many appliances. Multimeters are ready in whether digital or analog models. Digital multimeters will display readings in numbers. Analog multimeters indicate the value with a needle over a scale.
Have you ever wondered why a light doesn't turn-on. If the lightbulb is not bad, the lamp may be out of order? Is the lamp cord bad? Here is one uncomplicated example where a digital multimeter comes in very handy. A beneficial function of a multimeter is the resistance, or "continuity" test function. To avoid the opening of electrical shock, it is important to never use the continuity test function on any appliance that has live voltage connected. Always make sure the appliance is first Not related to any power source.
SHOCK YOU LIKE AN ELECTRIC EEL
Now with the power disconnected, set the multimeter dial to Resistance (Ohms). Touch the two test probes together (one is Red "positive", the other is Black "negative"). The Ohm meter reading will indicate zero resistance. When there is zero resistance, you have continuity. A reading of zero indicates the circuit is complete and the circuit can guide current. Now for an easy first test, take a appropriate lightbulb out of a lamp socket. Touch one test probe to the bottom of the lightbulb, and touch the other test probe to the threaded side of the lightbulb socket. If you read continuity, or zero resistance, the lightbulb is good. If the meter does not indicate continuity, then you know the lightbulb interior filament is broken (current can not pass thru). The same test can be performed on two ends of a uncomplicated electrical cord. If the meter does not indicate continuity, then there is a break in the circuit, and the cord is probably cut. Remember to never test the continuity of any cord or appliance with the power on. Always first disconnect any power or current source.
To test a switch, place a test probe on each side (pole) of the switch. When you move the switch from the off to on position, the multimeter reading should convert from zero to infinity. If not, then the switch is not working properly. To test a motor, touch a test probe to each pole. Again, a reading of zero indicates that the motor has continuity, current can pass through, and the motor windings are good.
After determined learning the instructions of the digital multimeter, you will be able to move on to more detailed electrical tests. A multimeter can part alternating current (Ac or household current) or direct current (Dc or battery current) in a live circuit. It can also check voltage. A multimeter can test 120 volts Ac in a home circuit, or it can test Dc batteries to learn if they are weak or fully charged.
Take the time now to learn how to properly use a basic multimeter. You will be glad you did when someday you would like to verify the cause of an daily electrical problem.
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Digital Multimeters SHOCK YOU LIKE AN ELECTRIC EEL
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