Digital Micrometer

 

A digital multimeter (DMM) is a device that provides multiple types of measurements within one device. DMMs use a more accurate and readable digital output than an analog solution. Without using a DMM to immediately measure live voltage and currents, there is a risk of painful shocks that can even be lethal. Therefore, it poses a serious safety hazard.

Modern multimeters are often digital due to their accuracy, durability, and extra features. In a digital multimeter, the signal under test is converted to a voltage, and an amplifier with electronically controlled gain preconditions the signal. A digital multimeter displays the quantity measured as a number, which eliminates parallax errors.

 

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Description

 

A digital multimeter (DMM) is a device that provides multiple types of measurements within one device. DMMs use a more accurate and readable digital output than an analog solution. Without using a Digital Multimeter to immediately measure live voltage and currents, there is a risk of painful shocks that can even be lethal. Therefore, it poses a serious safety hazard.

Modern multimeters are often digital due to their accuracy, durability, and extra features. In a digital multimeter, the signal under test is converted to a voltage, and an amplifier with electronically controlled gain preconditions the signal. A digital multimeter displays the quantity measured as a number, which eliminates parallax errors.

Modern digital multimeters may have an embedded computer, which provides a wealth of convenience features. Measurement enhancements available include:

 

  • Auto-ranging
  • Auto polarity
  • Sample and Hold
  • Current-limited tests for the voltage drop across semiconductor junctions.
  • A graphic representation of the quantity under test, as a bar graph
  • A low-bandwidth oscilloscope.
  • Automotive circuit testers, including tests for automotive timing and dwell signals
  • Simple data acquisition features to record maximum and minimum readings over a given period or to take a number of samples at fixed intervals.
  • Integration with tweezers for surface-mount technology
  • A combined LCR meter for small-size SMD and through-hole components