O'Reilly logo

Electrical Technology, Vol2: Machines and Measurements, 1/e by S. P. Bali

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

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 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required