Capacitance meter of 40 milli farad range

Discussion in 'General Electronics Chat' started by vks_foe, Nov 29, 2013.

  1. vks_foe

    Thread Starter Active Member

    Jan 11, 2009
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    Can somebody pls suggest a handheld meter which can measure capacitance upto 40 milli farad? Also, is there any website where we can compare the meters (DMM, portable oscilloscope etc) by specs? It is very difficult to choose a meter even amongst the meters of one brand.
     
  2. w2aew

    Member

    Jan 3, 2012
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    40 millifarads is an unusually large value of capacitance, not often encountered in electronics work. Thus, most handheld DMMs will not cover this range. You'll probably have better luck with a dedicated LCR meter, or a bench DMM. Or, with this large value capacitance, it wouldn't bee too hard to estimate the capacitance by measuring charge time via a resistor and power supply, or current source.
     
  3. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    The vast majority of meters max out at 20 mF.

    This one goes up to 200 mF:

    http://www.home.agilent.com/en/pd-1...acitance-meter?nid=-34196.920241&cc=US&lc=eng
     
  4. k7elp60

    Senior Member

    Nov 4, 2008
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    Another solution would be to take a value in uF, measure it and then put it in series with the larger value, measure the total capacitance and then calculate what the larger value is.
     
  5. vks_foe

    Thread Starter Active Member

    Jan 11, 2009
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    Its a nice idea.. in theory.. Can there be any practical issues which may bring in any error ??
     
  6. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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  7. PackratKing

    Well-Known Member

    Jul 13, 2008
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    Someone is not considering their scientific notation here...
    milli-farad = 1/1000 farad
    microfarad, 1/1,000,000 -- is the standard measure for a DMM... either that or it's me that ain't paying attention :D
     
    Last edited: Nov 30, 2013
  8. k7elp60

    Senior Member

    Nov 4, 2008
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    The only thing I can think of is the accuracy of the capacitance meter. I currently have a BK Precision LCR meter that measures up to 2000uF. It is model 875A(I have had over 10 years)I have used it to measure low value of capacitors in the pF range, by putting capacitors in parallel, and measuring inductors of low value by putting inductors in series with a higher known value.
     
    Last edited: Nov 30, 2013
  9. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Agilent is not Chinese, it's a division of Hewlett packard and the range is what it says it is.
     
  10. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    I know what the specs mean and so does Agilent. It is what it says it is.
     
  11. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    Sorry I should have posted more clearly. My point was that if checking specs of products on ebay etc, where they have "Chinglish" specs etc to be aware that they can sometimes use "mF" to mean microfarad.

    I did not really expect the Agilent product to be specced in Chinglish, it was a general warning about "mF". :)
     
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