Re: Testing solder joint
From: Bob Shuman (reshuman_at_removethis.lucent.com)
Date: 10/25/04
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Date: Mon, 25 Oct 2004 12:11:18 -0500
You will not be able to test the joint with a multi-meter. This is because
the dry solder joint could show as a low ohms (good) connection when you
measure and then easily break open or go high resistance (a bad connection)
at any time later.
The only way I have found to determine if a joint is bad is to physically
look at it. A magnifying glass is helpful in this regard, especially if the
joint area is small.
The best way to avoid creating a cold solder joint is to make sure your
surfaces being joined are CLEAN and that you use a good quality rosin core
solder and a well tinned temperature controlled soldering iron. You need to
leave the iron on the surfaces long enough to get them hot enough to flow
the solder and create a smooth joint.
Bob
"Grant" <grogers@lineone.net> wrote in message
news:1098713026.067716.22650@c13g2000cwb.googlegroups.com...
> Hi all,
>
> I have been installing a back light for my gameboy advance but I have
> created a few dry joints, I am going to order some new equipment to
> make it better, some braid solder sucker, new solder iron and a
> multimeter so I can clean it up start again then test the new joints.
>
> What I would really like to know is how can I test a solder joint is
> perfect/good using a multimeter? Or do I need some other equipment?
> Thanks
> Grant
>
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