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Analog Panel Meters

Home Measuring & Control Instruments Analog Panel Meters

Analog multimeters do take some energy from the circuit they are testing, whereas digital multimeters operate independent of circuit energy. In order to give an accurate reading analog multimeters need a high level of sensitivity—otherwise, the results may be skewed. When testing for resistance, the multimeter can rely on battery power.

Category: Measuring & Control Instruments
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Description

Advantages

  1. They are more accurate than analog multimeters.
  2. They reduce reading and interpolation errors.
  3. The ‘auto-polarity’ function can prevent problems from connecting the meter to a test circuit with the wrong polarity.
  4. Parallax errors are eliminated. If the pointer of an analog multimeter is viewed from a different angle, you will see a different value. This is parallax error. A digital multimeter’s numerical display solves this problem
  5. Digital multimeter displays have no moving parts. This makes them free from wear and shock failures.
  6. The reading speed is increased as it is easier to read.
  7. Unlike analog multimeters, zero adjustment is not required.
  8. Digital output is suitable for further processing or recording and can be useful in a rapidly increasing range of computer controlled applications.
  9. With the advent of Integrated circuits, the size, cost and power requirements of digital multimeters has been drastically reduced.
  10. Accuracy is increased due to digital readout. You can make mistake in reading the scale in analog multimeter, but digital multimeters have a LCD display to show accurate reading.
  11. DMMs can be used in testing continuity, capacitors, diodes and transistors. More advanced digital multimeters can also measure frequency.
  12. The ‘auto-ranging’ feature of a digital multimeter helps in selecting different measurement ranges, which can prevent damage to the meter if the wrong range is selected.
  13. Portable size makes it easy to carry anywhere.
  14. They cause less meter loading effects on the circuits being tested.
  15. Some advanced digital multimeters have microprocessors and can store the readings for further processing.
  16. They have very high input impedance.

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