How to Use a Multimeter

Using a multimeter will help you get an idea of how the electricity functions in and around your home. The features of each product may vary, so look for the comparable feature on your device if you’re going to use this guide.

How to Measure Voltage

Configure the meter so it is set at the maximum AC volt level. Put the black probe into the -jack. Put the red probe in the V section. Look for the voltages scale. There may be quite a few there.

Remember that the highest value scale must be the same as the selector knob. Look for an electrical outlet (i.e., 120 volts). Set the black probe in one of the straight slots. When using a
multimeter, remember that the probe can be released.

Put the red probe in another straight slot. Done properly, the meter will register 240 volts. Take out the probes. Set the selector to the lowest setting possible. It should be higher than the voltage shown (i.e., 120). Put the probes back in place. The results may be 110 or 125 volts.

If nothing happens, you probably picked DC. AC and DC modes cannot be interchanged. Double check this to make sure. If the multimeter has alligator chips, use it to help you with the process.

How to Measure Resistance

To start using a multimeter to check the resistance, configure the meter to ohms. Link the black test lead to a jack called Common or the “-“. Get the red test lead and link it with Omega.

This is the one with the letter R. if possible, set the R to 100. Grab hold of both leads’ ends. The meter will move to the right. Find the Zero Adjust knob. Turn it so the sign reads 0. Never forget to reset it to zero after altering the resistance range.

Get new batteries if you can’t get a zero ohm. Install the new batteries and try it again. If you’re just experimenting, try it with a light bulb. Look for the bulb’s electric contact points.

Get someone to hold the bulb glass. To start using a multimeter, set the black probe on the threaded base. Put the red probe on the center base near the bottom. The needle will move.

Trips and Warnings

Before assessing continuity, the power must be removed. The ohm meters have their own power supply with a battery. Not getting rid of the power will destroy the unit. Check the manual of your multimeter for more information.

For testing purposes, use the multimeter only with working voltages. This will ensure the product is working. If the meter reads 0 it is broken. Never connect a multimeter with a battery if it’s configured to detect amps. This will cause the multimeter to explode.

Remember that you are working with electricity here. Take all the necessary precautions. Do not attempt to do readings on damaged or burned circuits. If you are uneasy about handling electrical components, get someone to help you.

Using a multimeter isn’t as complicated as some may assume. If you follow the instructions carefully, getting appropriate readings will be straightforward.

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