The measurement of the slip of an induction motor is a common industrial and educational measurement. Traditional methods of slip measurement, of which some of the most common are outlined, tend to be either inaccurate or cumbersome. A recently developed instrument which may be used for both transient and steady-state measurements, is described, which is easy to use and accurate results are quickly obtained. It is not necessary to make any connections to the supply or to fit a transducer to the shaft of the machine.
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