Light Spot Galvanometer

Description

The instrument consists of a taut suspension movement, light source, projection system, scale and sensitivity control switch. All components of the instrument are housed in a dust free aluminium cabinet nicely finished by stoving enamel paint.

The light source consisting of a 4V 4W lamp is mounted on a small rectangular detachable plate fixed in front of the galvanometer housing to allow the bulb to be replaced. A circular plate is fixed on this rectangular plate which enables the exact adjustment of light spot. The Galvanometer indicator consists of a bright circular spot of light with a vertical hair line shadow on a translucent scale with dual graduations in millimeters (0….14 & 7….0….7 cms).

Two models are available for different purposes:

  • Voltage sensitive model Cat. No. PL64- In this model the coil resistance is low and it is useful for measurement of low resistances.
  • Current sensitive model Cat No PL64.01- In this model the coil resistance is high and it is useful where high resistances are measured.
  • High sensitivity (70 mm/ µA)
  • Five sensitivity positions
  • Built-in universal shunt
  • Constant terminal resistance

Cat No.

Resistance Of Coil in ohms

Period in Seconds

Critical damping resistance in Ohms

Terminal resistance in Ohms

Sensitivity

PL64

20

2

140

17.5

7

0.35

PL64.01

1500

1.7

13000

1345

70

0.046

 Over all size : 280 x 185 x 140 mm

 Weight : 3 Kg

  • Science Laboratories
  • Engineering applications
  • General electrical work

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