50

Ammeters, Voltmeters and Ohmmeters

OBJECTIVES

In this chapter you will learn about:

  • Difference between ammeters and voltmeters and how to connect them
  • Accuracy of meters in terms of full-scale deflection
  • Requirement of a shunt to bypass excess current
  • Multi-range ammeters
  • Calculation of the value of shunt for different currents
  • Different methods of connecting shunts in multi-range ammeters
  • Universal shunt and its significance
  • Calculation of the value of universal shunt
  • Ammeter loading and how to minimize its effect
  • Requirement of multiplier to drop excess voltage
  • Multi-range voltmeters
  • Calculation of the value of multipliers for different ranges
  • Different methods of connecting multipliers in multi-range voltmeters
  • Voltmeter loading ...

Get Electrical Technology, Vol2: Machines and Measurements, 1/e now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.