What will happen if you use the thermocouple welding technique? It seems = that the thermocouple is based on the peltier effect of the dissimilar = junction between the iron constantan or chromel alumel or what ever. If = other metals are introduced, like tin-lead, for example, the peltier = characteristics will be altered and likely not follow the normal curve. I = have never heard of anyone soldering a thermocouple but I suppose some = people might do that. I have seen the two separate thermocouple wires = affixed to a common substrate where the errors cancel. If soldering is a = common practice I would sure like to hear about it and know if the soldered = junction tracks the TC curve exactly. One idea might be to go to the Omega Website and see what products they = offer for making thermocouples. ----- Original Message ----- = From: "Darrell Wyatt" To: Sent: Monday, June 12, 2006 1:18 PM Subject: RE: [EE] Soldering thermocouple wire? > Neil, > > Don't know if you're aware of this, but the metals in the solder will = > alter > the signal when they come into contact with the thermocouple wires. Not > much help, I know, but I'd hate to see you put a > lot of effort into something like this and have it fail to function as > intended. > > D. > > > > >>From: Picdude >>Reply-To: "Microcontroller discussion list - Public." >>To: piclist@mit.edu >>Subject: [EE] Soldering thermocouple wire? >>Date: Wed, 07 Jun 2006 22:25:42 -0700 >> >>I tried to solder thermocouple wire to a PCB board, but the solder >>(standard 63/37, rosin-cored tin/lead solder) would not adhere to it. Is >>there an easy way to solder this to a PC board? I'd like to have the cold >>junction right on the PC board, but space is really tight and I cannot fit >>a screw terminal in there easily to join the parts >> >>Any clues? The thermocouple wire I have is solid, so not sure if that >>makes a difference, but can't see why it should. Or are there different >>types of k-type thermocouple wire such that one might be easily = >>solderable? >> >>Thanks, >>-Neil. >> >>-- >>http://www.piclist.com PIC/SX FAQ & list archive >>View/change your membership options at >>http://mailman.mit.edu/mailman/listinfo/piclist > > _________________________________________________________________ > Is your PC infected? Get a FREE online computer virus scan from McAfee=AE > Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3D3963 > > ---------------------------------------------------------------------------= ----- > -- = > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist