Multimeter Basics and Applications

Multimeter 1

• Aim: Use of multimeter, including continuity testing, voltage measurements (DC and AC), and checking components

• Continuity Test: Checks if a circuit is complete. A beep indicates continuity (low resistance). No beep means discontinuity (high resistance)

• Multimeter Functionality: A single device acting as ammeter, voltmeter, and ohmmeter. It can measure both alternating and direct current/voltage.

• Range Adjustment: Adjusting the dial changes internal shunt resistance in the ammeter circuit, and internal series resistance in the voltmeter circuit

• Apparatus: Multimeter, cartridge fuse, wire, various cells (Leclanche, Danielle, dry), step-down transformer

• DC Voltage Measurement:

  • Set the dial to DC Voltage mode
  • Connect the red probe to the positive terminal and the black probe to the negative terminal
  • The display shows the voltage reading.

• AC Voltage Measurement:

  • Set the dial to AC Voltage mode
  • Insert probes into the secondary terminals of the step-down transformer
  • Record the reading

Procedure (General)

• Continuity Test:
  • Set the multimeter to continuity mode.
  • Touch the probes together and listen for a beep. A beep indicates the multimeter is operational. -Place probes at two points on a circuit/wire to test whether or not there is a connection/continuity
• Checking a Fuse: Test the fuse for continuity
• Measuring Cell Voltage: Measure the voltage across various cells
• Measuring Transformer Voltage: Measure the AC voltage across the secondary of a step-down transformer

Results

• Continuity: Record whether the tested components (fuse, wires) have continuity or not
• DC Voltage: Record voltage readings for various cells
• AC Voltage: Record AC voltage readings across the secondary tapping of the step-down transformer

Explore the essential functions of a multimeter, including continuity testing and voltage measurements for both DC and AC. This quiz covers the practical use of a multimeter in checking electronic components and making accurate voltage readings. Test your knowledge and understanding of this vital electronic measurement tool.