Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!bgsuvax!valdes
From: valdes@bgsuvax.UUCP (oscar Valdes)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: Peltier effect device
Keywords: Thermocouples
Message-ID: <6793@bgsuvax.UUCP>
Date: 29 Dec 90 17:33:29 GMT
References: <18522@shlump.nac.dec.com>
Reply-To: valdes@bgsuvax.UUCP (oscar Valdes)
Organization: MD & MF International
Lines: 33

In article <18522@shlump.nac.dec.com> pierson@ggone.enet.dec.com (Dave Pierson) writes:
>	There are always two junctions.  One may be the juction of the
>	TC leads with the measuring instrument terminals.  TC rigs always
>	measure the difference between the two junction temperatures.  To get
>	(attempted graphics, Cu/Con couple...)
>                 _______Cu_____________o_(Cu)____>Amp hi
>		/                      |
>	       /measuring junction     |<-Ref temp
>	       \                       |	
>		\______Con_____________o__(Cu)___>Amp Lo
>				       ^-the "other" junction
>	




	In other words, what you are saying is that if there is no

measuring instrument there is no voltage generated due to the 

dissimilarity of the two metals.

	I wonder how the metals "know" there is a measuring instrument

present.



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	Sooner or later reality bites you in the ass

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