How would I measure Power Factor

Discussion in 'The Projects Forum' started by Viann, Jun 16, 2009.

  1. Viann

    Thread Starter New Member

    Jun 16, 2009
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    0
    I'm working on a Digital Wattmeter project, where the wattmeter is plugged to the mains, and an appliance is plugged to the wattmeter.

    My question is, is there a way to measure Power Factor accurately?

    EDIT:
    I have heard of a Power Factor IC, which conveniently measures the power factor when connected. However, I could not seem to come across it.
     
    Last edited: Jun 16, 2009
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    If you have an oscilloscope you can find the phase difference between the voltage and current and thus the power factor.
     
  3. Viann

    Thread Starter New Member

    Jun 16, 2009
    5
    0
    I might have access to an oscilloscope, however, since I am building a wattmeter, I cannot use the oscilloscope to measure power factor.

    Is there an alternative?
     
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