# 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
55
5
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
219
64
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
2,498
507
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
479
69
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
55
5
Its a nice idea.. in theory.. Can there be any practical issues which may bring in any error ??

Feb 11, 2008
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7. ### PackratKing Well-Known Member

Jul 13, 2008
850
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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

Last edited: Nov 30, 2013
8. ### k7elp60 Senior Member

Nov 4, 2008
479
69
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
2,498
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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
2,498
507
I know what the specs mean and so does Agilent. It is what it says it is.

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11. ### THE_RB AAC Fanatic!

Feb 11, 2008
5,435
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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".