how to use analog multimeter | analog multimeter tutorial | Check AC volt with analog multimeter

Summary

This video provides a comprehensive guide to using an analog multimeter, covering its user interface, measurement techniques for DC and AC currents, voltage, resistance, and continuity testing. Viewers will learn how to connect the multimeter correctly, calibrate it for accurate readings, and interpret the results on various scales. The tutorial emphasizes practical applications, such as measuring the current through an LED or checking the continuity of an electrical switch. With clear instructions and demonstrations, this video is an excellent resource for beginners looking to enhance their skills with this essential tool.

Takeaways

• 😀 Understand the components of an analog multimeter, including the scale, needle, calibrating knob, and connecting ports.
• 🔌 To measure DC current, connect the black probe to the common port and the red probe to the positive port, selecting the appropriate current range.
• 🔧 Calibration is essential; if the needle isn't at zero, adjust the zero ohm knob with a screwdriver before taking measurements.
• 💡 When measuring DC current with a load like an LED, always connect the multimeter in series within the circuit.
• 🔋 For measuring DC voltage, connect the probes to the battery, selecting a suitable voltage range, and calibrate as needed.
• ⚡ To measure AC voltage, follow similar steps as DC voltage, but ensure to select the AC voltage range.
• 📏 Resistance measurement requires connecting the red probe to the ohm port and calibrating by shorting the probes.
• 📊 If the needle shows little movement while measuring resistance, increase the selected range for accurate readings.
• 🔄 To check continuity in a switch, connect the probes appropriately and listen for a sound indication when the switch is on.
• 🎥 This tutorial provides a comprehensive guide on using an analog multimeter effectively for various electrical measurements.

Q & A

What is the first step in using an analog multimeter?

The first step is to familiarize yourself with the user interface, which includes understanding the scale, needle, calibrating knob, zero ohm adjuster, selection area, connecting ports, and the positive and negative probes.

How do you measure DC current with an analog multimeter?

To measure DC current, connect the black probe to the common port and the red probe to the positive port. Select the appropriate current range, calibrate the multimeter, and then connect it in series with the circuit to read the current on the scale.

Why is calibration necessary before taking measurements?

Calibration is necessary to ensure accurate readings. If the needle is not at zero, adjustments using the zero ohm knob must be made before taking any measurements.

What do you do if the multimeter needle does not move when measuring resistance?

If the needle does not move, it indicates that the selected range is too low for the resistance value. You should switch to a higher range and calibrate the multimeter again if needed.

What steps are involved in measuring AC voltage?

To measure AC voltage, connect the black probe to the common port and the red probe to the positive port. Select the appropriate voltage range, calibrate the multimeter, and then connect the probes to an AC power source to read the voltage.

How can you check the continuity of an electrical switch?

To check the continuity of an electrical switch, set the multimeter to the buzzer mode, connect the probes to the switch terminals, and check for sound when the switch is in the on position. If the multimeter produces sound, the switch is working properly.

What should you do if you don't know the voltage of a battery when using a multimeter?

If the voltage of a battery is unknown, start by selecting the maximum voltage range on the multimeter and then decrease the range as needed until you get a reading.

What does the selection area on the multimeter indicate?

The selection area indicates the measurement mode and range that the multimeter is set to, such as DC current, AC voltage, resistance, etc.

How do you measure resistance with an analog multimeter?

To measure resistance, connect the red probe to the ohmic port and the black probe to the common port. Select the resistance range, calibrate the multimeter, and then connect the probes to the resistor to read the resistance value.

What is the significance of the blinking line on the multimeter display?

The blinking line indicates the measurement section being used, whether it's for DC current, AC voltage, resistance, or continuity testing.