[NJARC] Questions on use of capacttance meter (Heathkit)

[John Ruccolo]

Hi Phil,

Just curious -- did you also try to measure the *capacitance* of those NOS caps? 
The eye should close somewhere around .2 uF. (This is on the cap test, not the 
leakge test -- assuming that this is a cap bridge and will measure capacitance).

JR



----- Original Message ----
From: Aaron Hunter <ahunter01 at comcast.net>
To: Mike Feher <n4fs at eozinc.com>
Cc: Phil Vourtsis <philvourtsis at gmail.com>; NJARC Reflector 
<njarc at mailman.qth.net>
Sent: Sat, July 17, 2010 9:19:14 AM
Subject: Re: [NJARC] Questions on use of capacttance meter (Heathkit)

Just remember 
Reply = Poster
Reply All = Everyone

_________________________________________________________
Phil

If yours is like my Heathkit IT-11, then the eye should stay open.  
There is no mention of how long to observe the "eye".  The eye will take 
longer to open while charging larger value caps.  If the eye does not 
fully open or starts blinking at you, then it is bad.  Electrolytic 
testing is a different story.

Aaron

Mike Feher wrote:
> Just remember 
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> If the eye is open when the capacitor is not attached, then I would assume
> that if the eye stays open when you do attached it, at the rated voltage,
> does imply minimal leakage. One way to confirm it is to place a 1 meg or a
> 100K resistor in place of the capacitor and then see what the eye does.
> Regards - Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
>
>
>
> -----Original Message-----
> From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
> On Behalf Of Phil Vourtsis
> Sent: Saturday, July 17, 2010 12:45 AM
> To: NJARC Reflector
> Subject: [NJARC] Questions on use of capacttance meter (Heathkit)
>
> Just remember 
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> Guys,
>    I'm trying to test some .2 mfd sprague new old stock capacitors with a
> Heathkit capacitance tester. I don't have the instruction book so here are a
> couple of questions. To measure leakage on a .2 mfd 600 volts cap, I set the
> voltage to 600 and push the lever to leakage test. The eye tube has the open
> V. Can I presume that the open V means no leakage? How long do I have to run
> the leakage test to determine if the cap is leaky?
>
> Thanks,
> Phil V
> ExPres - NJARC 1998 - 2008
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