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

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49

Meter Movement

OBJECTIVES

In this chapter you will learn about:

  • The different types of torques in metre movements
  • The associated scales in metre movements
  • Moving-coil and moving-iron instruments
  • The merits and demerits of the above instruments
  • Polarized moving-iron instruments
  • The construction and operation of dynamometer-type instruments
  • Different types of induction-type instruments
  • The details of construction and operation of hot-wire instruments
  • The operating principles of thermocouple
  • Utility of thermocouples as measuring instruments
  • Galvanometers and their use as multi-type instruments
  • Optical system associated with galvanometers
  • The principle of electrostatic voltmeters
  • The properties of electrostatic voltmeters
  • Simple problems ...

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