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Reply To: | TechNet E-Mail Forum. |
Date: | Thu, 8 Feb 2001 11:31:36 -0500 |
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Phil,
Does the Aluminum tape have to have certain characteristics or be from a
certain manufacturer? We are presently using aluminum tape simply bought at
a hardware store, should we be using more specific tape whose adhesive if
more resistant to temperature? Does such a product exist?
Samuel Ares
Process Engineering
Leitch Technology Int.
[log in to unmask] <mailto:[log in to unmask]>
(416) 445-9640 x. 3395
-----Original Message-----
From: Phil Zarrow [SMTP:[log in to unmask]]
Sent: Wednesday, February 07, 2001 7:57 PM
To: [log in to unmask]
Subject: Re: [TN] "Temprobe" thermocouples for profiling
Howard and all -
I benchmark tested the Temprobes a few years ago. I found the trick
to
getting a reltatively accurate reading was to make sure that the
probe tip is
in firm and tangent contact with the solder joint. If it is not
making good
contact, as in only a portion of the tip on the joint due the angle
of the
joint, you will get the noise you noticed (and a very inaccurate
reading)l.
Very similar to attaching a TC with kapton tape (another no--no) =
you're
reading air temp, IR, and not just the interconnection. Some users
have
actually put thermal "grease" on top of the Temprobe/Joint
interconnection
(yuk).
I've been very dubious of temporary probe attachment but, having
worked in
contract assembly, know the reality of some situations. The
Temprobe can
work but with the caveats. Greg Jones of KIC and others have
experimented
with aluminum tape with very good, reliable results. I have yet to
test this
method thoroughly but Greg is very credible.
Happy profiling!
Phil Zarrow
ITM Consulting
Durham, Great White North of NH USA
www.ITM-SMT.com
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