continuity across capacitor

Discussion in 'Electronic Design' started by sudheervemana, Dec 19, 2003.

  1. Hi All,

    In my circuit board,there is continuity across the
    capacitor ends ,first i thought it has been shorted so even after
    removing it from the board,it was showing the continuity across the
    two ends of a capacitor,i looked out the possibility of showing the
    continuity ,but there is no way of getting it.what could be the reason
    behind it.when i tried to measure the value through the DMM it was
    showing the wrong value.generally when will show the continuity across
    the capacitor.Please give me your valuable suggestions.

    Thanks in advance.

    With Regards,
    sudheervemana.
    sudheervemana, Dec 19, 2003
    #1
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  2. sudheervemana

    Robert Baer Guest

    sudheervemana wrote:
    >
    > Hi All,
    >
    > In my circuit board,there is continuity across the
    > capacitor ends ,first i thought it has been shorted so even after
    > removing it from the board,it was showing the continuity across the
    > two ends of a capacitor,i looked out the possibility of showing the
    > continuity ,but there is no way of getting it.what could be the reason
    > behind it.when i tried to measure the value through the DMM it was
    > showing the wrong value.generally when will show the continuity across
    > the capacitor.Please give me your valuable suggestions.
    >
    > Thanks in advance.
    >
    > With Regards,
    > sudheervemana.


    Good capacitors will read *open*; in other words, NO CONTINUITY!
    Now a large electrolytic may take a while to charge up (especially on
    the high resistance scales), but will read a rather high resistance at
    worst (and will read open when very good).
    Some DMMs also have a capacitance setting, with seperate connections
    for measurement.
    Since you are not being specific, i have no idea as to how you are
    trying to make measurements, what you are reading, or what you *think*
    is wrong with what you are reading.
    ..and i also have no idea as to what kind of capacitor or its value
    that you are trying to measure.
    Robert Baer, Dec 19, 2003
    #2
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  3. sudheervemana

    R.Legg Guest

    (sudheervemana) wrote in message news:<>...
    > Hi All,
    >
    > In my circuit board,there is continuity across the
    > capacitor ends ,first i thought it has been shorted so even after
    > removing it from the board,it was showing the continuity across the
    > two ends of a capacitor,i looked out the possibility of showing the
    > continuity ,but there is no way of getting it.what could be the reason
    > behind it.when i tried to measure the value through the DMM it was
    > showing the wrong value.generally when will show the continuity across
    > the capacitor.Please give me your valuable suggestions.


    If you are troubleshooting a circuit and you suspect a short exists
    across a specific part, the fastest way to confirm this is to remove
    the specific part. If the short follows the part, you've guessed
    right.

    You've been asking a lot of questions that could have been answered
    much more quickly by using similar basic troubleshooting methods.
    Obviously, you cannot expect serious responses to these inquiries, if
    they continue, without any evidence that you've taken the time to
    consult a primer on basic DC circuits.

    RL
    R.Legg, Dec 19, 2003
    #3
  4. sudheervemana

    N. Thornton Guest

    (sudheervemana) wrote in message news:<>...
    > Hi All,
    >
    > In my circuit board,there is continuity across the
    > capacitor ends ,first i thought it has been shorted so even after
    > removing it from the board,it was showing the continuity across the
    > two ends of a capacitor,i looked out the possibility of showing the
    > continuity ,but there is no way of getting it.what could be the reason
    > behind it.when i tried to measure the value through the DMM it was
    > showing the wrong value.generally when will show the continuity across
    > the capacitor.Please give me your valuable suggestions.
    >
    > Thanks in advance.
    >
    > With Regards,
    > sudheervemana.


    I get the gist but its hard to understand the details here. If the cap
    is shorted its dead.

    Regards, NT
    N. Thornton, Dec 19, 2003
    #4
  5. Robert Baer <> wrote in message news:<>...
    > sudheervemana wrote:
    > >
    > > Hi All,
    > >
    > > In my circuit board,there is continuity across the
    > > capacitor ends ,first i thought it has been shorted so even after
    > > removing it from the board,it was showing the continuity across the
    > > two ends of a capacitor,i looked out the possibility of showing the
    > > continuity ,but there is no way of getting it.what could be the reason
    > > behind it.when i tried to measure the value through the DMM it was
    > > showing the wrong value.generally when will show the continuity across
    > > the capacitor.Please give me your valuable suggestions.
    > >
    > > Thanks in advance.
    > >
    > > With Regards,
    > > sudheervemana.

    >
    > Good capacitors will read *open*; in other words, NO CONTINUITY!
    > Now a large electrolytic may take a while to charge up (especially on
    > the high resistance scales), but will read a rather high resistance at
    > worst (and will read open when very good).
    > Some DMMs also have a capacitance setting, with seperate connections
    > for measurement.
    > Since you are not being specific, i have no idea as to how you are
    > trying to make measurements, what you are reading, or what you *think*
    > is wrong with what you are reading.
    > ..and i also have no idea as to what kind of capacitor or its value
    > that you are trying to measure.


    DearSir,

    Before giving the supply to the board , When i tried to
    measure the value of an electrolytic capacitor (10uf)on the pcb
    through DMM on capacitance settings,it was reading a low value around
    1nf and there is no continuity across them .After giving the power and
    doing some troubleshooting,later switching off the power i tried to
    measure the value,even then it was showing low value around some nano
    farads,but this time there is continuity across the pins,what could be
    the reason,please help me in this continuity across the discretes.

    Regards,
    sudheervemana.
    sudheervemana, Dec 20, 2003
    #5
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