X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from py-out-1112.google.com ([64.233.166.177] verified) by logan.com (CommuniGate Pro SMTP 5.1.5) with ESMTP id 1780527 for flyrotary@lancaironline.net; Sun, 21 Jan 2007 03:22:23 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.166.177; envelope-from=bartrim@gmail.com Received: by py-out-1112.google.com with SMTP id a29so454884pyi for ; Sun, 21 Jan 2007 00:21:35 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:from:to:subject:date:message-id:mime-version:content-type:x-mailer:thread-index:content-language; b=SHxkFyVFF8R+IITRUFVNGvDz4F1kok4ZKxk8pB1mtsldYmWAiClJfQwa3mkugUsBahfC8tfAP24jfK7O8seVxf5OqVJI12+KD4oz3s9An4RGWuGg5sA9NEo9kXKPE/tqm5r1vLO9idGCmbch9ckVLuceMJY1Y14K0QMoX5qO7J8= Received: by 10.35.99.17 with SMTP id b17mr7760297pym.1169367694960; Sun, 21 Jan 2007 00:21:34 -0800 (PST) Return-Path: Received: from Endurance ( [205.250.245.125]) by mx.google.com with ESMTP id w38sm3861924pyg.2007.01.21.00.21.33; Sun, 21 Jan 2007 00:21:34 -0800 (PST) From: "Todd Bartrim" To: "'Rotary motors in aircraft'" Subject: Thermocouple Splicing Date: Sun, 21 Jan 2007 00:21:17 -0800 Message-ID: <00aa01c73d35$21240c00$636c2400$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AB_01C73CF2.1300CC00" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Acc9NRdAt3LErO3DSJ+rLdOHU7oOZQ== Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_00AB_01C73CF2.1300CC00 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Scott; My replies to your questions keep bouncing, so I'm trying this as a new e-mail. I'm just going to paste a response to a previous e-mail of a similar nature. It should lead you to the answers you need. Ernest is correct in that the error introduced at the junction will cancel each other as long as careful attention is paid to keep everything the same at both junctions. However the junction created when you switch to copper is called the reference junction and has special importance. More info can be found here... http://www.omega.com/techref/thermoref.html If you are unfamiliar which thermocouples and want more good info, then this link is excellent. http://www.omega.com/techref/themointro.html It also has links to other good info on various aspects of T/C's In my application I used a bundled T/C extension wire to go from the D-sub connector on the EM2 to a small sealed junction box located beside the engine. http://www.omega.com/pptst/4KX_MULTIPAIR_CABLE.html I used a 4 pair "K" type stranded and a 4 pair "J" type stranded cable. They are flexible and I was able to solder to the D-sub connector. This keeps the reference junction at the EM2. In the junction box beside the engine I have a terminal strip where I can connect individual T/C wires. Some of these are permanent, such as the "K" type which are used for the EGT & TIT, but the "J" types I have moved to various locations while experimenting. S. Todd Bartrim C-FSTB Turbo13B RV9 http://www3.telus.net/haywire/RV-9/C-FSTB.htm http://members.cox.net/rogersda/rotary/configs.htm#C-FSTB ------=_NextPart_000_00AB_01C73CF2.1300CC00 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi Scott;

         &= nbsp;      My replies to your questions keep bouncing, so I’m trying this as a = new e-mail. I’m just going to paste a response to a previous e-mail of = a similar nature… It should lead you to the answers you = need.

 


Ernest is correct in that the error introduced at the junction = will
cancel each other as long as careful attention is paid to keep = everything
the same at both junctions. However the junction created when you = switch to
copper is called the reference junction and has special importance. = More
info can be found here...
http://www.= omega.com/techref/thermoref.html
If you are unfamiliar which thermocouples and want more good info, = then this
link is excellent.
http://www.= omega.com/techref/themointro.html
It also has links to other good info on various aspects of = T/C's

In my application I used a bundled T/C extension wire to go from the = D-sub
connector on the EM2 to a small sealed junction box located beside = the
engine.
http://www.= omega.com/pptst/4KX_MULTIPAIR_CABLE.html
I used a 4 pair "K" type stranded and a 4 pair = "J" type stranded cable. They
are flexible and I was able to solder to the D-sub connector. This = keeps the
reference junction at the EM2. In the junction box beside the engine = I have
a terminal strip where I can connect individual T/C wires. Some of = these are
permanent, such as the "K" type which are used for the EGT = & TIT, but the
"J" types I have moved to various locations while = experimenting.

 

S. Todd Bartrim

C-FSTB

Turbo13B RV9

http://www3.telus.net/haywire/RV-9/C-FSTB.htm

http:/= /members.cox.net/rogersda/rotary/configs.htm#C-FSTB

 

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