Electronics Forum | Mon Jan 28 16:12:47 EST 2013 | emeto
I will treat it as any other BGA. Drill a hole in the board, put thermocouple and do your profile.
Electronics Forum | Mon Apr 07 15:14:41 EDT 2014 | garym4569
I drilled a small hole from the other side in order to get my thermocouple under the inductor pad. I did not have anything on hand to fill the hole, so I covered with kapton tape the best I could. I suspect that is why it looks like it should work.
Electronics Forum | Tue Apr 08 08:04:57 EDT 2014 | cyber_wolf
Ahhh...now this makes sense. Glad you found the issue. Gary, try using aluminum tape to secure thermocouples. It works much better than kapton in my opinion. KIC sells it, but I'm sure it can be found elsewhere.
Electronics Forum | Thu Apr 24 12:18:01 EDT 2014 | cyber_wolf
You must thermally profile your circuit boards with a data-logger and thermocouples. Just putting in oven set points and looking at solder joints is not enough. Reference IPC-7530
Electronics Forum | Fri Dec 05 10:09:36 EST 2014 | robl
Hi Rob, Could be moisture getting into the boards or the BGAs or it could be drafts messing with the thermocouples measuring the heat at board level meaning you over cook it. Are you pre-baking the PCBAs & the BGAs before reworking and replacing?
Electronics Forum | Mon Jan 19 22:59:52 EST 2015 | mac5
Carl, You can use a high temp solder to connect your T/C's but we use Kapton or glass tape so the T/C's can be reused. Mac
Electronics Forum | Mon Jan 19 23:18:56 EST 2015 | cspasol
Thank you mac. May I know what t/C's your using? Do you have any recommended High temp solder that we can buy? We already use Kapton, but it affects the curved on our profile data.
Electronics Forum | Tue Dec 15 09:21:49 EST 2015 | fuji_user_2014
Can you please contact me? We may have work for you related to Conceptronics HVA102 oven. Our oven is not showing any readings from thermocouples. We suspect bad special function card? My number is 774-553-6644, ask for Greg.
Electronics Forum | Wed Dec 16 07:09:36 EST 2015 | jdengler
I have seen bad transistors on the expansion boards cause no display of temperatures from the thermocouples. Jerry
Electronics Forum | Wed Jan 13 10:10:22 EST 2016 | tombstonesmt
I believe it's time to upgrade. We use Data Paq. Had it for YEARS! Easy to setup; has all the features you need without all the bells and whistles of Kic.
