Mailing List flyrotary@lancaironline.net Message #64534
From: Ernest Christley echristley@att.net <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Hey Neil,
Date: Fri, 14 Dec 2018 16:25:16 +0000 (UTC)
To: Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net>
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:


On 12/14/2018 8:57 AM, Ernest Christley echristley@att.net wrote:


On Thursday, December 13, 2018, 6:22:16 PM EST, Todd Bartrim bartrim@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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