testing_smd_capacitors_with_the_chinese_clip_IMG_6997.JPG
The 47 pF SMD reads 45.230 pF, after zeroing the meter with the clip attached, hand free measurements.
The clip
fits nicely with
It is the small ones I care about.
The spring in the Chinese alligator clip is very strong, I bended it a bit back to reduce the force on the SMDs. It is not so easy to get the spring out, easy to shift it back in...
My people use this for receiving inspection, a few parts off each reel.
I found the little fixture on ebay.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
That's a copy of the HP 16034E, for the 4192A, etc.
--
Thanks,
- Win
On a sunny day (Wed, 12 Jun 2019 15:42:25 -0700) it happened John Larkin wrote in :
That is nicely made!
One thing I wonder, had the same idea here, that foam you use, what is the dielectric constant? It gets a bit between the test pins, if you zero with it, and then add the SMD does it cause an error? I forgot to mention that I adjusted the spring in my case so the alligator clip never 100% closes, but just stays a mm or 2 open, and am using a flat table:
That makes zeroing easier, else you'd have to put a something like a match in between the contacts.
It is nice, but there is price difference with my gadget
356$ plus 90$ shipping on ebay:For production it is cool of course. I just wanted to check if the SMD caps were in the right boxes from my ebay set, after I had some strange effects replacing caps for tuning RF stuff.
That is either a VERY small one or a short?
Yes:
:-)
That is a lot of icecream.
It is. It's $150 on ebay.
I open the gap by eyeball, about the size of the part, zero the meter, then insert the part.
I think this is the one I bought:
That's the default position, shorted. It's spring loaded in the shorting direction.
If we catch one reel of bad parts, it's paid for itself. Reworking 50 boards would be expensive.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
On a sunny day (Thu, 13 Jun 2019 07:56:49 -0700) it happened John Larkin wrote in :
OK, got it, thought for a moment even smaller SMDs .. :-)
True
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