July 27, 2010
Tutorial - Reflow Toaster
about 2 years ago
Be aware when using thermocouples, that I found the temperature measured by a probe style thermocouple in the air a couple of cm above the board registered up to 30 deg C lower than a thermocouple bead clipped onto the board (over a via hole) using a paper clip.
This is because the board and components are much better absorbers of infra-red radiation from the heating elements than the metallic probe in the air.
So there is a serious risk of overheating your components if you don’t measure the temperature of the board itself.
I used a 9 litre, 1400W mini-oven with 4 unshielded elements.
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