Hi Brian,
My use of the thermal grease, as I had indicated, was in the past. I have not
used it for a long
time.
But, I'm curious. What were the reasons that these people/entities gave to you
for not using the
thermal grease? Why wasn't it acceptable for them? Surely, they should have
given reasons for their
positions. Please advise. (BTW, I'm not trying to be contentious. I'm just
trying to know their
reasoning)
Best regards,
Ron Pickard
rpick...@hypercom.com
boconn...@t-yuden.com
Sent by: To:
emc-p...@majordomo.ieee.org
owner-emc-pstc@majordo cc:
mo.ieee.org Subject: RE: Thermocouple
glue
04/28/2003 09:55 AM
Please respond to
boconnell
My use of thermal grease was discontinued several years ago by request of
various agency engineers
reviewing test data/technique. And more recently, during my ISO 17025 audit,
the NCB auditor
explicitly directed me to never use thermal grease for thermocouple
application. And auditors from
other NRTLs/NCBs have emphasized, at least verbally, that thermal grease is
not acceptable.
R/S,
Brian
From: Ron Pickard [mailto:rpick...@hypercom.com]
Sent: Friday, April 25, 2003 10:19 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: Thermocouple glue
To all,
I'm surprised that no one hasn't mentioned this yet.
In the past for this application, the securement that I was introduced to was
fiberglass tape and
that white thermal grease. The tape exhibited high thermal stability and was
used to secure the
thermocouples, but left adhesive residue when removed after a temperature
test. The thermocouple was
inserted into the grease which offered excellent thermal conduction from the
measurement point to
the thermocouple. The downside to this grease, as anyone who's used this
grease would say, is that
the grease is "messy to the extreme" and it generally could not be completely
removed from any
surface that it came in contact with. And, it always found a way to get onto
unintended surfaces
including clothing. But, as a plus, the thermal grease would stay put
physically over a very wide
temperature range.
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