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Re: [Fot] EGT Probes?

To: 'Gary Schneider' <garygret@sbcglobal.net>, 'Tony Drews' <tony@tonydrews.com>, FOT <fot@autox.team.net>
Subject: Re: [Fot] EGT Probes?
From: "Barr, Scott" <sbarr@McCarty-Law.com>
Date: Mon, 18 Aug 2014 22:15:47 +0000
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Thread-topic: [Fot] EGT Probes?
Right - naturally I knew that.  I mean, who doesn't, right?   ;-)

I'll pull the old ones out and replace them and send or bring the new ones to
you to play with.

Scott

From: Gary Schneider [mailto:garygret@sbcglobal.net]
Sent: Monday, August 18, 2014 5:13 PM
To: Barr, Scott; 'Tony Drews'; FOT
Subject: Re: [Fot] EGT Probes?

As you likely know a thermocouple is just two dissimilar-metal wires welded
together at the tip. They are made tiny for quick thermal response and not
much can survive 1400 degrees of corrosive gases for extended periods. I'd
guess the tips corrode and go open or resistive. If you give me a failed one
sometime I'd be interested in taking it apart and making some comparative
measurements. I believe the EGTs are all Type K and I can compare to
temperature references we have at work for calibration. We have microscopes
with cameras too.

Gary

________________________________
Sent: Monday, August 18, 2014 3:38 PM
Subject: Re: [Fot] EGT Probes?

That's what I've been thinking.  Do the probes foul, or do the wires just
break?  I've been told the wires are a little fragile.

Scott B.

-----Original Message-----
Sent: Monday, August 18, 2014 3:37 PM
To: Barr, Scott; FOT
Subject: Re: [Fot] EGT Probes?

Yes, that's the normal failure mechanism for the EGT gauge.  I'm on my 2nd
set
of probes.

Tony Drews

At 03:26 PM 8/18/2014, Barr, Scott wrote:
>So if my EGT stops working or works only intermittently, is it likely
>that I need new probes? (I did check to see that the connections are
>still...connected)  The tailpipe color looks good (a nice dove grey),
>but I'm getting no reading on one side of the gauge and a low reading
>on the other side.
>
>Scott B.
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