multimeter

• Multimeter

  Also known as a volt-ohm meter, a handheld tester used to measure values like electrical voltage, current (amperage), resistance, etc.
• Multimeter


  • Is the tool preferred by electricians for troubleshooting electrical problems in motors, appliances, circuits, power supplies, and wiring systems
• Types of Multimeters

  • Analog Multimeter
  • Digital Multimeter
• Analog Multimeter

  Is based on a microammeter, uses a needle that moves over a graduated scale, less expensive, difficult for some users to read accurately compared to digital multimeter, much more fragile as they can be damaged if dropped, great for detecting slow voltage changes due to the visible needle moving over the scale, exceptional when used as ammeters due to their low resistance and high sensitivity
• Digital Multimeter

  Most commonly available type, include simple versions as well as advanced designs, provide readings on an LCD screen, more expensive than analog multimeter, better at reading voltmeter function due to higher resistance, easier to read and more accurate reading
• Parts of Multimeter

  • Pointer and Scale
  • Dial/Infinity Knob
  • Zero Ohm Adjuster
  • Range Selector Knob
  • Test Probes

  
• How to Use Multimeter

  1. Get familiarized with the parts of the multimeter

  2. Measuring Resistance

  3. Measuring Voltage

  4. Measure Amperes
• To ensure performance and reliability, identify issues, and enhance safety and security are the reasons why it is important to test your computers
• Resistance and continuity are opposites, and you cannot measure continuity if set to resistance
• If there is little resistance, there will be a great deal of continuity
• The pointer will rest at the left-most position if the lead is not in contact with anything, representing an infinite amount of resistance or an "open circuit"
• Shorting the probes together and using the zero-ohm knob to zero out the meter is done to get more accurate resistance readings
• When measuring voltage, the meter circuitry and movement will not be damaged by voltage if set to the highest range provided for AC Volts
• The voltage scale is linear and accurate anywhere along its length
• When measuring amperes, the meter must be able to measure the same mode (AC or DC) amps as the circuit