[TriEmbed] need stupid pet trick immediately
pete at soper.us
Wed Oct 15 14:44:20 CDT 2014
I've got four of the typical high temp fabric-coated type K thermocouple
probes and can't get the buggers to reliably sit with some tension on
the top of PCBs in an oven. I can imagine many solutions better than the
fractional hectares of Kapton tape I'm applying along with bending the
freaking things down, then pulling them back up with the silly hope that
they'll sit on the target board surface. The kapton is of course
screwing my experiment 'cause it is a fabulous heat insulator.
What is the proper way to do this??? The crux of the problem is
"something" that can magically hold the last inch or so of thermocouple
lead down against the PCB where the lead kisses the PCB and the thing
holding it down doesn't itself hose up the temperature measurement process.
This is what the oven drawer looks like. As you can see, the
thermocouple lead is threaded through the slots in the drawer, and with
a bit of tape that keeps it from being sensitive to the drawerin being
slid back and forth. It's that last bit of getting the thing to reliably
sit on the PCB and not pop off and start measuring air temperature
that's killing me. Any help appreciated.
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