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From: Jean-Yves on 24 Dec 2007 05:42
In article <476EE8F6.D9D86385(a)earthlink.net>,
"Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote:

> Jean-Yves wrote:
> >
> > In article <fkiuma$og2$1(a)aioe.org>,
> > Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote:
> >
> > > >> robb wrote:
> > > >>
> > > >> > so i googled for some ESR meter plans and settled on this one
> > > >> >
> > > >> > http://ludens.cl/Electron/esr/esr.html
> > > >> >
> > > >> My opinion, It does not come close to actually giving you a
> > > >true
> > > >> ESR reading.
> > > >> All the design is doing is relying on high valued capacitors
> > > >assumed
> > > >> to still have life and hoping to display the effective series
> > > >resistance
> > > >> in them by assuming the Xc to be at a very low value with the
> > > >50khz
> > > >> referenced used.
> > > >> In practice, that isn't a real ESR meter.
> > > >>
> > > >
> > > >so this luden's ESR gives no useful info about a cap ? and its
> > > >a waste of time design ?
> > > >
> > > >Thanks for advice Jamie,
> > > >robb
> >
> > I bought recently this one :
> >
> > http://www.m3electronix.com/lcr.html
> > (the french version but it works the same)
> >
> > nice kit, and with the esr meter you have for the same price of most of
> > esr meters kits , a precise LCR meter !!!
> > this is a valuable instrument I really enjoy mine !
>
>
> It only has a 12.5 KHz maximum test frequecy.

it can go to 25khz with the user selectable frequency
yes it's less than the 100khz esr meters often use
but it's enought to measure dead caps !
and far more precise to measure other caps and inductors !
I also have a small analog esr meter I build
(the one from poptronix)
and I never use it anymore...

--
Jean-Yves.
From: Michael A. Terrell on 24 Dec 2007 12:27
Jean-Yves wrote:
>
> it can go to 25khz with the user selectable frequency
> yes it's less than the 100khz esr meters often use
> but it's enought to measure dead caps !
> and far more precise to measure other caps and inductors !
> I also have a small analog esr meter I build
> (the one from poptronix)
> and I never use it anymore...


If the OEM specifies their product at 100 KHZ, then that is the
frequency needed for a proper test.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
From: Daveolla on 28 Dec 2007 07:09
On Dec 24, 5:42 am, Jean-Yves <no_pub_for_jypoc...(a)free.fr> wrote:
> In article <476EE8F6.D9D86...(a)earthlink.net>,
>  "Michael A. Terrell" <mike.terr...(a)earthlink.net> wrote:
>
>
>
>
>
> > Jean-Yves wrote:
>
> > > In article <fkiuma$og...(a)aioe.org>,
> > >  Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote:
>
> > > > >> robb wrote:
>
> > > > >> > so i googled for some ESR meter plans and settled on this one
>
> > > > >> >  http://ludens.cl/Electron/esr/esr.html
>
> > > > >> My opinion, It does not come close to actually giving you a
> > > > >true
> > > > >> ESR reading.
> > > > >>  All the design is doing is relying on high valued capacitors
> > > > >assumed
> > > > >> to still have life and hoping to display the effective series
> > > > >resistance
> > > > >> in them by assuming the Xc to be at a very low value with the
> > > > >50khz
> > > > >> referenced used.
> > > > >>    In practice, that isn't a real ESR meter.
>
> > > > >so this luden's ESR  gives no useful info about a cap  ? and  its
> > > > >a waste of time design ?
>
> > > > >Thanks for advice Jamie,
> > > > >robb
>
> > > I bought recently this one :
>
> > >http://www.m3electronix.com/lcr.html
> > > (the french version but it works the same)
>
> > > nice kit, and with the esr meter you have for the same price of most of
> > > esr meters kits , a precise LCR meter !!!
> > > this is a valuable instrument I really enjoy mine !
>
> >    It only has a 12.5 KHz maximum test frequecy.
>
> it can go to 25khz with the user selectable frequency
> yes it's less than the 100khz esr meters often use
> but it's enought to measure dead caps !
> and far more precise to measure other caps and inductors !
> I also have a small analog esr meter I build
> (the one from poptronix)
> and I never use it anymore...
>
> --
> Jean-Yves.- Hide quoted text -
>
> - Show quoted text -

Greetings, what is wrong with the Poptronix version..........details
anyone (I've had one as an ongoing project for awhile, I had the
bright idea a couple of years ago to put it in a probe style case with
small meter)? It also has a led for DC shorts.
Dave
From: Jean-Yves on 28 Dec 2007 09:03
In article
<4493e4a6-79f8-4f7b-b8f7-c6dc8742afee(a)s8g2000prg.googlegroups.com>,
Daveolla <grobbins(a)netflash.net> wrote:

> > it can go to 25khz with the user selectable frequency
> > yes it's less than the 100khz esr meters often use
> > but it's enought to measure dead caps !
> > and far more precise to measure other caps and inductors !
> > I also have a small analog esr meter I build
> > (the one from poptronix)
> > and I never use it anymore...
> >
> > --
> > Jean-Yves.- Hide quoted text -
> >
> > - Show quoted text -
>
> Greetings, what is wrong with the Poptronix version..........details
> anyone (I've had one as an ongoing project for awhile, I had the
> bright idea a couple of years ago to put it in a probe style case with
> small meter)? It also has a led for DC shorts.
> Dave

there is nothing wrong with the poptronix version except that I have now
a far better esr (in fact rlc) meter since...
I still have the poptronic and it still works fine but I only have 10
leds to tell me the esr and now I have a 10000 count rlc meter...

the poptronic still has the frequency of 100khz for the test and I can
only go to 25khz with the rlc meter.

--
Jean-Yves.
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