Tachometer

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OBSERVATION OF TACHOMETER
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WHAT IS TACHOMETER?

• A tachometer is an instrument measuring the
  rotation speed of a shaft or disk, as in a motor
  or other machine.
• The device usually displays the revolutions per
  minute (RPM) on a digital display.

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METHODS FOR MEASURING ROTATION SPEED

• There are two methods for measuring rotation
  speed of a shaft by a tachometer. They are
• Contact Method.
• Non Contact Method.

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CONTACT METHOD

• In this method, we have contact the tachometer to
  the shaft of the motor to get its rotation speed.

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NON CONTACT METHOD

• In this method, we do not need to contact the
  tachometer to the shaft. We just need to switch
  on the button of emitting laser. We need to hold
  the tachometer firmly in such a way so that the
  laser is put on the shaft. Then, we will get the
  rotation speed in RPM.

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THE END

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