how to measure stray capacitance using LCR metre?

Discussion in 'General Electronics Chat' started by altaf, Sep 3, 2008.

  1. altaf

    Thread Starter New Member

    Sep 2, 2008
    3
    0
    Hi,
    I wanna to measure capacitance of a piece of wire inside some steel made system with respect to ground using LCR metre with 100KHz frequency.
    Using this meter I am getting anomalous results each time. from zero to negative capacitance. Could any one of you guide me in this respect?
     
    Last edited: Sep 12, 2008
  2. theamber

    Active Member

    Jun 13, 2008
    318
    0
    The rage of your LCR metre may not be enough.
     
  3. altaf

    Thread Starter New Member

    Sep 2, 2008
    3
    0
    Then what are requirements to measue a capacitance of a wire in such a systme?
     
  4. theamber

    Active Member

    Jun 13, 2008
    318
    0
    Stray capacitance is usually a residual effect that creates an error in a reading when measuring capacitance from a capacitor. If the stray capacitance is large enough to worry about in normal operation a tipical LCR meter will measure it.
    An AC excitation is necessary for sensing capacitance variations in stray capacitance.
    If your stray capacitance is minor you may need a more sophisticated lab equipment that regular test equipment.
     
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