Electronics Forum | Thu Jan 26 20:12:46 EST 2012 | gaz
We have a thermocouple that is basically some tc wire plugged into our reflow oven. The oven converts these voltages into the readings, but are all K type thermocouple wire the same, so would have the same exact same values sent to the ovens cpu? I
Electronics Forum | Fri Jan 27 09:00:14 EST 2012 | davef
A thermocouple is a set of two wires welded together at one end, where a junction is formed between the two wires. Because each wire is composed of a different type of metal, each wire reacts differently to the temperature of the junction. Because of
Electronics Forum | Thu Apr 15 11:53:37 EDT 2004 | Claude_Couture
Hi everyone, Our QC manager is bugging me about calibrating the TC readings on our reflow ovens. I keep telling him that doing a regular reflow profiling with a mole is sufficient to see if the oven temperature are normal. The manuals state that TC c
Electronics Forum | Thu Apr 15 16:33:40 EDT 2004 | wgaffubar
We never really use to calibrate the thermocouples on our reflow oven or wave solder systems, but we did disconnect the T/C's and input a calibration standard to check that the computer cards were correctly reading the proper temperature for a given
Electronics Forum | Fri Apr 16 07:34:10 EDT 2004 | Claude_Couture
Ken, thanks for your answer, it is much better presented than what I was fed by our qc. By "calibrating TCs" I meant the readings the controller is displaying on the screen. So that would be the converter that we would check and calibrate. Thank you
Electronics Forum | Thu Apr 15 20:41:22 EDT 2004 | Ken
There are ledgitimate reasons for checking furnace calibrations, but let me clarify what that is. 1. TC's are not necessarily calibrted. Not unless you need "absolute" accuracy. TC's operate against a (non-linear) standard +/- a tolerance. Most
Electronics Forum | Wed Aug 07 12:35:36 EDT 2013 | cyber_wolf
I was asked how we verify that the thermocouples INSIDE the reflow oven are calibrated. That seems pretty impractical to me. Has anyone come across this ?
Electronics Forum | Thu Aug 08 13:09:38 EDT 2013 | cyber_wolf
Hege, there is no actual calibration of the thermocouple itself. You can however verify that they read correctly. Heller sells an option on their reflow ovens specifically for this purpose. I hoping that someone chimes in here that is NADCAP certifi
Electronics Forum | Thu Jan 08 16:21:05 EST 2004 | Bill
James: The ovens can be calibrated to help get this a little closer. In the computer box are 3 cards (alike) attached to the motherboard. They are called IPS-7 cards. On these cards are 2 potentiometers to calibrate the T/Cs for the heat zones. There
Electronics Forum | Sat Sep 19 09:52:09 EDT 2009 | profilingguru
Before you rule out the profile, did you run an actual profile of the board or run machine characterization? How old are your TCs? Have you run them more than a half dozen times? Is your profiler calibrated. In my experience making a living of pr
