How to test 1F Capacitors ?

[Walter Harley]

"Jeff" <frontline_electronics@NSatt.net> wrote in message
news:a3pcb.151913$0v4.11300834@bgtnsc04-news.ops.worldnet.att.net...

Of course the meter responce should be included in
the measurement/time.
I have never tried that measurement and do not know
how my meter would read but I would assume 1A
for a short time and then not much because it would
be over by then.
Just joking on the "question" but maybe a peak hold
function would give a faster answer to the OP.

As with so many postings on this group, the original poster has never
responded to requests for more information. We really have no idea what
s/he was asking.

 

[Jeff]

"Walter Harley" <walterh@cafewalterNOSPAM.com> wrote in message
news:vn4bcv99g3eob6@corp.supernews.com...

"Jeff" <frontline_electronics@NSatt.net> wrote in message
news:a3pcb.151913$0v4.11300834@bgtnsc04-news.ops.worldnet.att.net...
Of course the meter responce should be included in
the measurement/time.
I have never tried that measurement and do not know
how my meter would read but I would assume 1A
for a short time and then not much because it would
be over by then.
Just joking on the "question" but maybe a peak hold
function would give a faster answer to the OP.

As with so many postings on this group, the original poster has never
responded to requests for more information. We really have no idea what
s/he was asking.

How true for many groups and posts, but with just as
many possible reasons why or why not.
How would that go with a 1/8W resistor?(joking)
Damn, all these caps are bad! They keep blowing the
resistor.
Or assuming the OP intended a cap for vehicle use...
Jeff

 

[WMGS]

mike <spamme0@juno.com> wrote in message news:<3F6EBE7B.9060201@juno.com>...

WMGS wrote:
Dear All,

I have lots of 1F Capacitors and want to check them if they are up to
their claimed stsndard. What should I do ? What equipment should I
need and where to find them ? I know it is common to check "u"F
Capacitors but not 1F .

Thanks in advance
WMGS

Why do you want to check them???

If you're building something, what cap parameters are important to that
design? Test for that.

If you just want to verify that they meet their spec, the first thing
you have to do is obtain and understand that spec. Then you have to
devise a test for each spec. And you probably need to heat them real
hot and cool them real cold to verify the electrical specs over the
specified temperature range.

Bottom line is that it's probably not practical. Just decide what's
most important and test that.
If "lots" is 50 your problem is different than if "lots" is 500,000 units.
mike

--
Bunch of stuff For Sale and Wanted at the link below.
laptops and parts Test Equipment
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http://www.geocities.com/SiliconValley/Monitor/4710/

I have finally found an equipment in SENCORE which costs about $2XXX
to test capacitors of 2000pF to 20F ! But I have lots of capacitors ,
which is around 100,000. So I would need lots of unskilled workers to
check them. I want to the check the claimed capacitance , charging
rate , discharge rate of the capacitors. The voltage is 5V . But it
still needs quite a lot of oscilloscopes (or just multimeters and
timers ? ) to check the dV/dt according to the proposed ways here .
Around 1000 of the capacitors will be selected from the large lot and
the checked for the first round to find the approximate % bad caps. Is
that right ?