How to Use Digital Multimeter

Summary

This tutorial video provides a step-by-step guide on how to use a digital multimeter, explaining its main components, such as the test probes, selector, and display. The video highlights the advantages of digital multimeters over analog ones, including affordability, ease of use, and greater accuracy. The tutorial covers how to measure voltage (both DC and AC) and resistance, offering practical examples like measuring a battery's voltage and household AC voltage. Additionally, the video demonstrates how to measure resistors and emphasizes safety when measuring high voltages. Viewers are encouraged to comment, like, and subscribe for future updates.

Takeaways

• 😀 Multimeter, also known as multitester or avometer, comes in two types: analog and digital.
• 😀 This video focuses on using a digital multimeter, which is cheaper and easier to use compared to the analog version.
• 😀 Digital multimeters offer higher accuracy with readings down to decimal places (e.g., 0.0).
• 😀 The main components of a multimeter include the test probes, selector switch, and display screen.
• 😀 The multimeter is primarily used to measure voltage, resistance (ohms), and current (amperes).
• 😀 To measure DC voltage (e.g., battery), set the selector to the closest voltage range, such as 20V for a 3V battery.
• 😀 For higher voltage measurements, set the selector to an appropriate range (e.g., 200V for a 50V measurement).
• 😀 When measuring AC voltage (e.g., household voltage), use a higher range like 750V for a typical 220V electrical system.
• 😀 Be cautious when measuring high voltage like AC mains voltage; avoid hesitation during the process to prevent sparks.
• 😀 The multimeter can also measure resistance. For instance, a 2.2kΩ resistor should be measured in the 20kΩ range, and a 30kΩ resistor in the 200kΩ range.

Q & A

What are the two main types of multimeters?

The two main types of multimeters are the analog multimeter and the digital multimeter.

Why is the digital multimeter more popular compared to the analog version?

The digital multimeter is more popular because it is cheaper, easier to use, and provides more accurate measurements.

What is the function of the 'probe' in a multimeter?

The 'probe' is used to make contact with the circuit or component being tested, allowing the multimeter to measure voltage, resistance, or current.

What does the selector switch on a multimeter do?

The selector switch allows you to choose the measurement type, such as voltage (DC or AC), resistance, or current, as well as the range of the values you want to measure.

How do you measure DC voltage using a multimeter?

To measure DC voltage, set the selector to the DC voltage setting (usually marked with a straight line above the 'V' symbol), then choose an appropriate range, such as 20V, for the voltage you're measuring.

What happens if the selector is set to too low a range for the voltage you're measuring?

If the selector is set to a range too low for the voltage you're measuring, the multimeter will not display any reading.

How do you measure AC voltage from a power socket?

To measure AC voltage from a power socket, set the multimeter to the AC voltage setting (marked with a 'V' and a wavy line), then choose an appropriate range, such as 750V, and place the probes into the socket.

What is the typical voltage for household power (AC) in many regions?

In many regions, the typical household AC voltage is around 220V, although it may vary slightly depending on the location.

How do you measure resistance using a digital multimeter?

To measure resistance, set the multimeter to the resistance setting (marked with an Ohm symbol), select a range higher than the expected resistance value, and place the probes across the resistor or component.

What should you do if the reading on the multimeter for resistance is not close to the expected value?

If the reading for resistance is not close to the expected value, ensure that the probes are correctly placed and check that the multimeter is set to the correct range. If the resistance is too high or too low for the range, adjust the range setting.