Today's Message Index:
----------------------
1. 06:38 AM - TC wire and dsub (Jan de Jong)
2. 07:28 PM - Re: TC wire and dsub (Robert L. Nuckolls, III)
3. 07:58 PM - Flaky EGT Probe (Art Zemon)
4. 08:32 PM - Re: Flaky EGT Probe (Jared Yates)
5. 11:01 PM - Re: Flaky EGT Probe (Bob Verwey)
Message 1
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| Subject: | TC wire and dsub |
Theoretically, extending thermocouple wires using a dsub connector
(with, say, gold over bronze contacts) should be ok provided any
temperature gradient across the connector is ignored. The thermocouple
voltages across the connector cancel out to 0.
In practice there could be a problem with corrosion of a thermocouple
wire where it meets gold.
Is there experience?
Thanks,
Jan de Jong
Message 2
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| Subject: | Re: TC wire and dsub |
At 08:36 AM 8/15/2019, you wrote:
>
>Theoretically, extending thermocouple wires using a dsub connector
>(with, say, gold over bronze contacts) should be ok provided any
>temperature gradient across the connector is ignored. The
>thermocouple voltages across the connector cancel out to 0.
>
>In practice there could be a problem with corrosion of a
>thermocouple wire where it meets gold.
Gold is electrolytically inert. I think
most thermocouple alloys are similarly
resistant to oxidation. I've run
TC wires though d-subs for decades with
good success . . . with one caveat:
My tasks were temporary instrumentation
installations so I've not personally
observed/demonstrated longevity in
field service. But given the low
reactivity of the alloys involved,
I'm pretty confident that they'll
last a long time.
Bob . . .
Message 3
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Folks,
One of my four EGT probes is flaky. Sometimes it works. Most of the time it
reads zero (too low to register). I don't actually use the EGT for anything
so I'm not very excited about spending money to fix it. But it annoys me to
see three nice green bars and one black space where there should be a green
bar.
Are these things repairable?
-- Art Z.
--
https://CheerfulCurmudgeon.com/
*Love the stranger for you yourselves were strangers in Egypt. *Deut. 10:19
Message 4
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| Subject: | Re: Flaky EGT Probe |
Art, you seem like the kind of fellow who would appreciate a lengthy blog post:
http://bearhawkblue.com/replacing-the-oem-dynon-thermocouple-connectors-with-omega-connectors/
On August 15, 2019 23:05:01 Art Zemon <art@zemon.name> wrote:
> Folks,
>
> One of my four EGT probes is flaky. Sometimes it works. Most of the time it
> reads zero (too low to register). I don't actually use the EGT for anything
> so I'm not very excited about spending money to fix it. But it annoys me to
> see three nice green bars and one black space where there should be a green
> bar.
>
> Are these things repairable?
>
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> *Love the stranger for you yourselves were strangers in Egypt. *Deut. 10:19
Message 5
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| Subject: | Re: Flaky EGT Probe |
Hi Art
So how is it that you dont use your EGT? To me it is a prized tool in the
engine management arsenal!
On Fri, 16 Aug 2019 at 05:03, Art Zemon <art@zemon.name> wrote:
> Folks,
>
> One of my four EGT probes is flaky. Sometimes it works. Most of the time
> it reads zero (too low to register). I don't actually use the EGT for
> anything so I'm not very excited about spending money to fix it. But it
> annoys me to see three nice green bars and one black space where there
> should be a green bar.
>
> Are these things repairable?
>
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> *Love the stranger for you yourselves were strangers in Egypt. *Deut.
> 10:19
>
--
Best...
Bob Verwey
082 331 2727
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