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Interesting. Well, at this point, I guess the quickest way to find out what is best is to do a resistance check on the probes I have.
On Friday, December 14, 2018, 10:24:52 AM EST, Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:
Thank you for the write up, Todd. I'm working on a
Corvair engine, and want to get away from CHT probes
with spark plug rings. What I'm looking to do is have a
small ring terminal clamped to the end of TC wire and
then clamp that to the side of the head with a screw
into a hole tapped into the head near the spark plug.
At that point, I'm picking up the temperature of the
aluminum near the plug, without the probe being part of
the spark plug installation.
The only question I have (and why I haven't moved
forward with the idea) is, "Is it ok to ground the end
of the TC wire?" Your write-up seems to suggest that it
is.
I'm not Todd, but 'it depends'. Thermocouples are made in both
grounded and ungrounded configurations. The configuration has to
match your measurement device's configuration.
Charlie
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